KLH Model 331 loudspeakers

 KLH Dedicated Loudspeakers - A new standard in sound and styling

KLH has always had the uncanny ability to make graceful loudspeakers that could reproduce a remarkable amount of sound. This, coupled with an unfailing reputation for quality and hand craftsmanship, is the benchmark of the KLH tradition. With the Dedicated Series of KLH loudspeakers, the company adds further to that tradition by setting a new standard in sound and styling. Each of these five superb loudspeakers borrows freely from KLH's classic technology and are of acoustic suspension design.
The tweeters, midranges and cross-over networks are all vastly improved devices of completely new manufacture that represent the industry's most advanced technology (Indeed, the 4-1/2" midrange used in the Model 353 is considered by most experts as the best cone-type ever made and is usually found in only the most costly loudspeakers.)

Each of the five Dedicated Loudspeakers boasts increased efficiency over previous models - with much brighter sound and greater overall musicality. And each of them regardless of size or price, recreates the subtleties and innervoices of the orchestra demonstrably better than past competitive models. Stated simply, they are easily among the best loudspeakers we, or anybody else, has ever made.
They are also unquestionably, the best value we have ever offered. And since we've always offered one heck of a lot of speaker for the money, that's saying quite a lot. Here then, dedicated to you, is the new KLH Dedicated Series - beautiful loudspeakers for people who really care about what they hear.

KLH Model 331

Frequency Response:  50 Hz - 18 kHz

8 ohm two-way, ported cabinet loudspeaker system

One long excursion 8-inch KLH woofer;

One 2-1/4-inch cone tweeter

Minimum Recommended Power per Channel:  8 watts RMS

Maximum Power Handling (can be safely used with amplifiers rated up to): 75 watts RMS per channel

Wood grained vinyl on high density particle board

Removable front grille panel

Dimensions (H x W x D): 530 x 300 x 220 mm (21" x 12" x 8-3/4")

Weight (Shipping carton):  41 lbs (packed one per carton)

KLH Model 317 loudspeakers

KLH Dedicated Loudspeakers - A new standard in sound and styling

KLH has always had the uncanny ability to make graceful loudspeakers that could reproduce a remarkable amount of sound. This, coupled with an unfailing reputation for quality and hand craftsmanship, is the benchmark of the KLH tradition. With the Dedicated Series of KLH loudspeakers, the company adds further to that tradition by setting a new standard in sound and styling. Each of these five superb loudspeakers borrows freely from KLH's classic technology and are of acoustic suspension design.

The tweeters, midranges and cross-over networks are all vastly improved devices of completely new manufacture that represent the industry's most advanced technology (Indeed, the 4-1/2" midrange used in the Model 353 is considered by most experts as the best cone-type ever made and is usually found in only the most costly loudspeakers.)

Each of the five Dedicated Loudspeakers boasts increased efficiency over previous models - with much brighter sound and greater overall musicality. And each of them regardless of size or price, recreates the subtleties and innervoices of the orchestra demonstrably better than past competitive models. Stated simply, they are easily among the best loudspeakers we, or anybody else, has ever made.

They are also unquestionably, the best value we have ever offered. And since we've always offered one heck of a lot of speaker for the money, that's saying quite a lot. Here then, dedicated to you, is the new KLH Dedicated Series - beautiful loudspeakers for people who really care about what they hear.

KLH Model 317

Frequency Response:  45 Hz - 18 kHz

8 ohm two-way, high-efficiency, acoustic suspension loudspeaker system

One 10-inch KLH woofer;

One 2-1/4-inch cone tweeter

Three-position tweeter control switch - toggle

Minimum Recommended Power per Channel:  10 watts RMS

Maximum Power Handling (can be safely used with amplifiers rated up to): 100 watts RMS per channel

Wood grained vinyl on high density particle board

Removable front grille panel

Dimensions (H x W x D): 580 x 300 x 250 mm (23" x 12" x 9-3/4")

Weight (Shipping carton):  29 lbs (packed one per carton)

 

KLH Model 373 loudspeakers

A new standard in sound and styling

KLH has always had the uncanny ability to make graceful loudspeakers that could reproduce a remarkable amount of sound. This, coupled with an unfailing reputation for quality and hand craftsmanship, is the benchmark of the KLH tradition. With the Dedicated Series of KLH loudspeakers, the company adds further to that tradition by setting a new standard in sound and styling. Each of these five superb loudspeakers borrows freely from KLH's classic technology and (except the Model 331) are of acoustic suspension design.

 KLH Model 373
Frequency Response:  45 Hz - 22 kHz
8 ohm three-way, high-efficiency, acoustic suspension loudspeaker system
One 10-inch KLH woofer;
One 3-7/8-inch midrange;
One 2-1/4-inch cone tweeter
Two-position presence control switch - toggle
Minimum Recommended Power per Channel:  10 watts RMS
Maximum Power Handling (can be safely used with amplifiers rated up to): 150 watts RMS per channel
Wood grained vinyl on high density particle board
Removable front grille panel
Dimensions (H x W x D): 610 x 330 x 250 mm (24" x 13" x 9-5/8")
Weight (Shipping carton):  37 lbs (packed one per carton)

KLH Modell 363 loudspeakers

 KLH Dedicated Loudspeakers - A new standard in sound and styling

KLH has always had the uncanny ability to make graceful loudspeakers that could reproduce a remarkable amount of sound. This, coupled with an unfailing reputation for quality and hand craftsmanship, is the benchmark of the KLH tradition. With the Dedicated Series of KLH loudspeakers, the company adds further to that tradition by setting a new standard in sound and styling. Each of these five superb loudspeakers borrows freely from KLH's classic technology and are of acoustic suspension design.

KLH Model 363

Frequency Response:  30 Hz - 22 kHz

8 ohm three-way acoustic suspension loudspeaker system

One 12-inch KLH woofer;

One 5-inch midrange;

One 2-1/4-inch cone tweeter

Two rotary switches - one 2-position midrange control and one 3-position tweeter control

Minimum Recommended Power per Channel:  12 watts RMS

Maximum Power Handling (can be safely used with amplifiers rated up to): 150 watts RMS per channel

Wood grained vinyl on high density particle board

Removable front grille panel

Dimensions (H x W x D): 610 x 330 x 320 mm (24" x 13" x 12-5/8")

Weight (Shipping carton):  46 lbs (packed one per carton)

KLH Model 353 loudspeakers

KLH Dedicated Loudspeakers - A new standard in sound and styling

KLH Model 353

Frequency Response:  25 Hz - 22 kHz

8 ohm three-way acoustic suspension loudspeaker system

One very low resonance,

12-inch KLH woofer;

One 4-1/2-inch midrange;

One 2-1/4-inch cone tweeter

Two rotary switches - one 3-position midrange control and one 3-position tweeter control

Minimum Recommended Power per Channel:  25 watts RMS

Maximum Power Handling (can be safely used with amplifiers rated up to): 175 watts RMS per channel

Wood grained vinyl on high density particle board

Removable front grille panel

Dimensions (H x W x D): 660 x 360 x 320 mm (26" x 14" x 12-5/8")

Weight (Shipping carton):  49 lbs (packed one per carton)

 

Kenwood LS-406 loudspeakers

 Kenwood LS-series

Speaker Systems Way Ahead of Their Time

Introducing the most advanced development in speaker design and technology, with extended dynamic range, well-dispersed sound distribution and well-defined, solid bass.

Featuring:

The Kenwood Daphne Diaphragm, "perfect" diaphragm material for clean, clear sound.

Lumber-Core Baffle Board, to cut vibration and produce distinct, rich sound without distortion.

Bass-Reflex Design, mathematically calculated to deliver optimum bass response.

Low-Frequency Driver, carefully designed for well-defined, solid bass.

Linear Diaphragm Suspension, to keep bass resonance low and permit clean reproduction of the lowest frequencies

High-Frequency Driver, with dome-shaped diaphragm and well-designed dimensional relationships for exceptional presence.

Specifications LS-406

Drivers

Woofer:  10"

Tweeter: 1" dome

Frequency Response:  48 Hz to 20,000 Hz ±5 dB

System Resonance or Tuning:  36 Hz

Nominal/Minimum Impedance:  8 Ω  / 7,1 Ω 

SPL for less than 2% Harmonic Distortion:  103 dB

Typical Distortion Maximum (at any Frequency Above 100 Hz at 100 dB SPL):  1,0%

Average Acoustic Output at 2,73 V (1W/1m):  90 dB

Crossover Type:  LC

Acoustical Crossover Frequency:  3,500 Hz

Electrical Crossover Frequency:  2,000 Hz

Controls:  3 Position

Input Power to produce 90 dB SPL per 1000 Cubic Feet of Room Volume : 1,2

Dimensions (W x H x D):  15" x 25-3/4" x 12-1/2"

Weight:  38 lbs

Kenwood LS-405 loudspeakers

Kenwood LS-series

Speaker Systems Way Ahead of Their Time

Introducing the most advanced development in speaker design and technology, with extended dynamic range, well-dispersed sound distribution and well-defined, solid bass.

Featuring:

The Kenwood Daphne Diaphragm, "perfect" diaphragm material for clean, clear sound.

Lumber-Core Baffle Board, to cut vibration and produce distinct, rich sound without distortion.

Bass-Reflex Design, mathematically calculated to deliver optimum bass response.

Low-Frequency Driver, carefully designed for well-defined, solid bass.

Linear Diaphragm Suspension, to keep bass resonance low and permit clean reproduction of the lowest frequencies

High-Frequency Driver, with dome-shaped diaphragm and well-designed dimensional relationships for exceptional presence.

Specifications LS-405

Drivers

Woofer:  10"

Tweeter: 1" dome

Frequency Response:  58 Hz to 20,000 Hz ±5 dB

System Resonance or Tuning:  43 Hz

Nominal/Minimum Impedance:  8 Ω  / 7,1 Ω 

SPL for less than 2% Harmonic Distortion:  103 dB

Typical Distortion Maximum (at any Frequency Above 100 Hz at 100 dB SPL):  1,5%

Average Acoustic Output at 2,73 V (1W/1m):  90 dB

Crossover Type:  LC

Acoustical Crossover Frequency:  3,500 Hz

Electrical Crossover Frequency:  2,000 Hz

Input Power to produce 90 dB SPL per 1000 Cubic Feet of Room Volume : 1,2

Dimensions (W x H x D):  12-3/4" x 23-1/4" x 11"

Weight:  31 lbs

 

Kenwood LS-403 loudspeakers

 Kenwood LS-403 Speaker Systems

All of the new Kenwood LS speakers can be driven with as little 10 watts per channel. Used with a 50-watt=per-channel amplifier, these speaker systems will provide the full dynamic range inherent in today's contemporary music at live sound levels.

Specifications LS-403

Drivers

Woofer:  8"

Tweeter: 1-3/4" dome

Frequency Response:  65 Hz to 20,000 Hz ±5 dB

System Resonance or Tuning:  45 Hz

Nominal/Minimum Impedance:  8 Ω  / 7,8 Ω 

SPL for less than 2% Harmonic Distortion:  101 dB

Typical Distortion Maximum (at any Frequency Above 100 Hz at 100 dB SPL):  2%

Average Acoustic Output at 2,73 V (1W/1m):  88 dB

Crossover Type:  LC

Acoustical Crossover Frequency:  2,000 Hz

Electrical Crossover Frequency:  2,000 Hz

Input Power to produce 90 dB SPL per 1000 Cubic Feet of Room Volume : 1,8

Dimensions (W x H x D):  11-3/4" x 17-3/4" x 8-7/8"

Weight:  20 lbs

Electro-Voice Sentry 100EL monitor

Electro-Voice Sentry 100EL

Professional Powered Monitor System

Near-field monitor for post production and live sound

Wide, uniform coverage

Extremely smooth frequency response

High power handling

High-Performance, built-in, 50-watt amplifier for remote operation

Description

The Electro-Voice Sentry 100EL powered monitor speaker system combines the advantages of the Sentry 100A monitor with a self-contained, high-Performance power amplifier. It is designed with the broadcast/recording studio engineer in mind, although it is well suited for a wide variety of professional applications. The Sentry 100EL offers uniform frequency response and dispersion across a wide range.

A Super-Dome tweeter is employed to faith-fully reproduce program material at high levels, with response out to 18,000 Hz and uniform dispersion (120(O) at 5,000 Hz) The low-frequency section is an 8-inch direct radiator woofer installed in an optimally vented enclosure with fourth-order Butterworth tuning. The optimally vented design is responsible for the unusual combination of small size, extended bass response and high efficiency. Such performance is simply not available in other enclosures of similar size.

The Sentry 100EL is housed in a utility cabinet wrapped in a special scratch-resistant, matte black vinyl. The cabinet size is intentionally designed fro rack mounting. The steel-reinforced grille is covered with a custom gray cloth. This provides maximum protection and a pleasing, aesthetic quality.

The Sentry 100EL may be driven room any line-level signal source. An XLR-type connector is provided for use with balanced sources, while a 1/4-inch phone jack accommodates unbalanced lines. Uses only the appropriate connector; both should not be connected at the same time. Although both inputs are protected against voltage peaks of up to 100 volts, connection from an external power amplifier is redundant and invariably results in increased noise and distortion.

Most importantly, a sharp cutoff, high-pass filter is included which has been precisely tailored to the Sentry 100EL response. It provides a dramatic reduction of energy-wasting, sub-sonic signals in the amplifier and woofer. By controlling low-frequency cone excursion and amplifier power, program material any often be reproduced at higher levels without distortion and without any reduction in acoustic low-frequency response.

A system level control is located on the front of the enclosure which varies the gain of the amplifier from zero over a useful range of more than 30 dB. Additionally, a red indicator lamp shows when AC power is applied to the Sentry 100EL. A replaceable AC power fuse is located on the rear panel of the system. The rating and type are identified beside the fuse holder. Under normal conditions, even with momentary overloads, the fuse will not blow.

Specifications

Frequency Response:  48 to 18,000 Hz (1m on Axis, Anechoic Environment, Swept One-Third-Octave Pink Noise +_3 dB)

Dispersion Angle Included by 6 dB Down Points, 10 Foot Microphone Distance, Anechoic Environment, One-Third Octave Bands Of Pink Noise

Horizontal

250 - 6,300 Hz (158°  ±32° )

8,000 - 20,000 Hz (55°  ±18° )

Vertical

250 - 6,300 Hz (140°  ±40° )

8,000 - 20,000 Hz (52°  ±13° )

Crossover Frequency:  2,000 Hz

Sound Pressure Level(1m, max. gain, 0 dBu into Balanced Input, Anechoic Environment, 300 - 2,000 Hz Average):  108 dB

Dimensions (H x W x D):  438 x 305 x 292 mm (17,25" x 12,0" x 11,5")

Net Weight:  15 kg (33 lb)

Amplifier Section

Continuous Sine Wave Power (6 ohm load, 120 V line):  50 watts

Dynamic Range:  92 dB minimum

Residual Noise (max. Gain, 600 Ω  source, 20 - 20,000 Hz bandwidth):  400 µV max

Power Bandwidth (-3 dB):  30 - 20,000 Hz

Total Harmonic Distortion:  (1,000 Hz, 50 watts): 0,05% typical

Low Frequency Filter

Slope :  12 dB/octave

-3 dB Point :  28 Hz

Balanced Input, Sensitivity (50 watt output):  0,775 V (0 dBu)

Impedance:  30 k Ω 

Maximum Level:  8,0 V (+20 dBu)

Common Mode Rejection:  40 dB minimum

Connector Type:  3-pin XLR-type female

Polarity (for positive sound pressure):  Pin 2 positive

Unbalanced Input, Sensitivity (50 watt output):  0,39 V (-6 dBu)

Impedance:  10 k Ω 

Maximum Level:  30 V (+32 dBU)

Connector Type:  1/4-inch phone jack

Polarity (for positive sound pressure):  Tip positive

Power Requirement

Domestic Model :  120 watts max. 105 - 130 V, 60 Hz

Fuse :  1-1/2 A slo-Bloe, Type 3AG MDL or MDX

Export Model :  210 - 260 V, 50/60 Hz

Fuse :  800 mA slow acting, type FTT

 

Electro-Voice Sentry 100A loudspeakers

ELECTRO-VOICE Sentry 100A

Sentry Studio Monitors, superb standard of audio reproduction

Sentry 100A for tight spaces

Just because your monitor space is limited, you don't have to compromise on sonic accuracy. The Sentry 100A is a compact, no-frills system that's ideal for restricted environments like mobile recording studios. it's the oldest member of the Sentry family and has become the industry standard of reliability.

The Sentry 100A delivers a flat 45 - 18,000 Hz frequency response with wide 120°  dispersion at 5000 Hz. The Super-Dome tweeter handles a remarkable 25 watts of input power and is matched with an 8" direct radiator woofer in an optimally vented enclosure.

The Sentry 100A is designed for efficient set up and operation. With the optional SRB-7 rack mount kit, the monitor can be installed from the front to a standard EIA 19" rack. The front mounted high frequency control allows quick and easy boost and cut adjustment.

Specifications

Frequency Response:  45 - 18,000 Hz ±3 dB

Dispersion Angle (Included by 6 dB Down Points):  

250 - 6,300 Hz :

Horizontal :  158°  ±32° 

Vertical :  140°  ±40° 

5,000 - 20,000 :

Horizontal :  55°  ±18° 

Vertical :  52°  ±13° 

Sound Pressure Level (at 1 m/1 W) :  91 dB

Power Handing Capacity:  30 W

Power Handing Capacity (10 ms above 40 Hz):  300 W

 

Tannoy DC200 loudspeakers

Tannoy DC200

The Tannoy Dual Concentric principle is widely accepted as one of the major technological breakthroughs in the design of loudspeakers.

The Dual Concentric is, in fact, "2-speaker-in one". If you took the grille off any Tannoy Dual Concentric there is what appears to be a single drive unit. Closer examination will show the compression high frequency driver sharing the same chassis as the bass unit. These two separate drive units provide a single xis for the reproduction of sound at all frequencies. The audio signal is supplied to each drive unit by a time compensated crossover, that aligns both high and low frequency sound sources towards a single point on that axis.

The music is clearer and more natural because the real harmonics and dynamics of the instruments and voices are retained, while the stereo image of the original performance is sharper and more convincing.

Tannoy's strong reputation for transducer design within the broadcast and recording industry has been harnessed within the recently designed 10" Dual Concentric used in the DC200.

Both DC's have excellent frequency response and good dispersion, and their ability to reproduce wide dynamics makes them particularly suitable to be used with the latest CD systems.

With the new DC series, the hi-fi enthusiast can experience all the characteristics and benefits of a major studio monitor in a smaller, cleanly styled enclosure.

Specifications DC200

Recommended Amplifier Power (RMS per channel into 8 Ω):  10 to 120 watts

Peak Input Power:  150 watts

Impedance:  8 Ω  (Nominal); 6 Ω  (Minimum)

Sensitivity (for 2,8 V in at 1 metre):  90 dB

Frequency Response:  45 Hz to 20 kHz ± 3 dB

Phase Response:  110 Hz to 10 kHz ±30*

Dispersion (at -6 dB points):  90°    conical

Crossover Frequency:  1,8 kHz

Crossover Type: Hardweired first & damped second order network with paralled impedance compensation

Distortion (for 90 dB at 1 m):  Less than 1% 100 Hz to 10 kHz

Bass Loading:  Single ducted port

Internal Volume:  33 liters

Cabinet Material:  18 mm and 15 mm particle board

Cabinet finish:  Walnut vinlyl veneer

Grille Construction:  Acoustic cloth over timber frame , detachable

Dimensions (HxWxD):  560 x 330 x 265 mm (22" x 13" x 10,4")

Weight:  12,5 kg (27,5 lbs)

 

Tannoy DC100 loudspeakers

Tannoy DC100 

The Tannoy Dual Concentric principle is widely accepted as one of the major technological breakthroughs in the design of loudspeakers.

The Dual Concentric is, in fact, "2-speaker-in one". If you took the grille off any Tannoy Dual Concentric there is what appears to be a single drive unit. Closer examination will show the compression high frequency driver sharing the same chassis as the bass unit. These two separate drive units provide a single xis for the reproduction of sound at all frequencies. The audio signal is supplied to each drive unit by a time compensated crossover, that aligns both high and low frequency sound sources towards a single point on that axis.

The music is clearer and more natural because the real harmonics and dynamics of the instruments and voices are retained, while the stereo image of the original performance is sharper and more convincing.

Tannoy's strong reputation for transducer design within the broadcast and recording industry has been harnessed within the recently designed 8" Dual Concentric drive unit used in the DC100 

Both DC's have excellent frequency response and good dispersion, and their ability to reproduce wide dynamics makes them particularly suitable to be used with the latest CD systems.

With the new DC series, the hi-fi enthusiast can experience all the characteristics and benefits of a major studio monitor in a smaller, cleanly styled enclosure.

Specifications DC100

Recommended Amplifier Power (RMS per channel into 8 Ω):  10 to 100 watts

Peak Input Power:  120 watts

Impedance:  8 Ω  (Nominal); 6 Ω  (Minimum)

Sensitivity (for 2,8 V in at 1 metre):  90 dB

Frequency Response:  53 Hz to 20 kHz ±3 dB

Phase Response:  100 Hz to 10 kHz ±30°   

Dispersion (at -6 dB points):  90°  conical

Crossover Frequency:  1,8 kHz

Crossover Type: Hardwired first & damped second order network with paralled impedance compensation

Distortion (for 90 dB at 1 m):  Less than 1% 100 Hz to 10 kHz

Bass Loading:  Single ducted port

Internal Volume:  20 liters

Cabinet Material:  15 mm and 12 mm particle board

Cabinet finish:  Walnut vinlyl veneer

Grille Construction:  Acoustic cloth over timber frame , detachable

Dimensions (HxWxD):  480 x 267 x 230 mm (19" x 10,5" x 9")

Weight:  8,75 kg (19,25 lbs)

 

Technics SB-4000 loudspeakers

 Technics SB-4000

Linear Phase Speaker System

The amazing waveform fidelity of the Technics Linear Phase speaker systems has now gained widespread attention. With the SB-4000 is a similar system . Yet it still retains the essential crispness and transparency of sound that characterizes its forerunners. As our oscilloscope tests have shown, sound pressure waveforms of musical instruments played through the Linear Phase system mirror almost exactly the original waveforms. This remarkable technological achievement came only after months of patient research by teams of dedicated audio specialists. The important elements of balanced tonality, finely etched transient response and excellent stereo imaging are all there, contributing tot a very convincing impression of live music.

Optimum speaker location By precisely aligning the acoustical centers of the speaker units and placing them physically as close together (while keeping them acoustically isolated). Technics engineers have succeeded in attaining phase linearity with even sound distribution. Moreover, the location of the units is finely tuned to compensate for slight phase shift in the crossover region. You will notice that the woofer is placed well away from the floor level to reduce boomy floor effects.

Vented Design for bass extension with excellent Power Handling

The SB-4000 is perfectly at ease handling Power up to 75 watts . And the High 91 dB efficiency assures ample volume, even with low power input. A surprisingly rich, solid bass response is achieved with a carefully tuned vented cabinet.

Specifications

Type:  2-way, 2-speaker bass-reflex system

Speakers:

Woofer : 200 mm cone type

Tweeter :  60 mm cone type

Impedance:  8 Ω

Power Handling Capacity:  75 W (Music) 50 W (DIN)

Output Sound-pressure Level:  91 dB/W (At 1,0 m)

Crossover Frequency:  2,500 Hz

Frequency Range:  45 Hz - 20,000 Hz (-10 dB)

Dimensions (W x H x D):  280 x  561 x 248 mm

Weight:  10 kg

KEF Reference Model Two loudspeaker

Reference Series Model Two (1994-99)

Model Two was a three-way floor standing system with a twin coupled cavity bass section. It offered a significant performance increment over the Model One and was the direct descendent of Model 103/4. It was ideally suited to use as a main speaker in small to medium sized rooms in a stereo or multi-channel system. It was updated in 1997 to include a boundary compensation device – switch-able attenuation of the bass output for use in small rooms or for positioning close to the room boundaries

Model Two Twin bass drivers and advanced,, large diameter force-cancelling rod provide prodigious levels of bass from a surprisingly slim enclosure. The Uni-Q mid and high frequency driver ensures that the sound stage is both wide and deep.

But if, like most people you tend to sit in different places, and want great sound for more than one person at a time, a pair of KEF Reference Loudspeakers will be music to your ears. The Uni-Q Drive Unit with its high frequency driver at the acoustic centre of the Mid-range cone turns the entire room into a "sweet spot".

Music in Minutes, not Hours.

It's the Uni-Q Driver Unit that makes KEF Reference Loudspeakers so simple to position. With ordinary loudspeakers their restricted "sweet spot" means that finding just the right position in your room can literally take hours. Furniture, curtains, walls, ceilings, even the sort of music you're playing can affect how they sound.

KEF Reference Loudspeakers on the other hand, with their ultra smooth off-axis response can be placed, plugged in and played in minutes. After all, it's the music that should be moving you, not the other way around.

Sound Where You Need It Not Where You Don't

It's not just the front of some loudspeakers that give out sound. A badly designed and ill-constructed unit can transmit vibrations through the back and the sides. This unwanted "cabinet Talk" can blur the stereo image and mar the reproduction of fine details.

At KEF we've virtually eliminated this problem in two ways. First, the drivers on the front of the loudspeakers are acoustically decoupled from the cabinet by a soft rubber mounting. And second, the internal bass units are joined back-to-back by a new and vastly improved force-cancelling rod that eliminates much of the vibration that can come from a bass unit and result in the cleanest possible reproduction.

Force-cancelling rods and acoustic decoupling reduce "cabinet talk" dramatically.

Specifications

System Type: Three-way, floor standing

Enclosure Type: Twin coupled cavity

Design:  3-way, 4-driver

Amplifier Requirements: 50 - 200 W

Frequency Response:  43 Hz to 20 kHz ±3 dB at 2 m on reference axis

Sensitivity:  90 dB at 1m/2.83V (anechoic conditions)

Maximum Output: 113 dB on programme peaks under typical listening conditions

System: SP3188

Drive Units

2 x B160 bass unit (SP1349),

B160 midrange unit (SP1345),

NT25 tweeter (SP1353)

Crossover: SP2224

Crossover Frequency:  3 kHz, 150 Hz

Nominal Impedance: 4 Ω 

Dimensions (H x W x D); 1012 x 230 x 300 mm (39.8 x 9 x 11.8 inches)

Weight" 29.6kg (65 lbs)

Finishes:  Rosetta burr/ Black ash

 

KEF Reference Model One loudspeakers

 Reference Series Model One (1994-99)

Model One was a three-way floor standing system with a single unit coupled cavity bass section. It offered refined musical reproduction in a compact enclosure. It could be used as a main speaker in small to medium sized rooms or as a rear speaker in a multi-channel system with one of the larger models at the front.

From the full three-way, three driver design with computer matched crossover to the coupled cavity bass loading. Model One are the very essence of all that we have striven for with our Reference Loudspeakers. They are perfectly suited to the smaller listening environment.

An Ability for Compatibility

Please don't think that just because we design and build KEF Reference Loudspeakers to such high standards that they are only suitable for critical applications like recording studios. Features like magnetic shielding and tonal accuracy make them ideally suited to home theatre systems. And unlike some so called "high end" products, they are quite at home with more affordable electronics. But of course, with loudspeakers of this calibre, the exceptional performance of more esoteric equipment is fully realised.

Every Part Perfect

Any loudspeakers is only as good as the sum of its parts. That's why, at KEF, we set rigorous standards for each and every component of our Reference Loudspeakers.

Just one example of this attention to detail is the Oxygen-Free Copper (OFC) internal wiring. Different gauges for bass, mid-range and high frequency drivers ensure maximum information transfer room even the most delicate of signals and as you'd expect, we hand solder these cables to further improve sonic integrity. At the rear of the loudspeakers, the internal wiring joins heavy gold plated terminals with a bi-wiring option.

Even the plinths are examples of KEF's commitment to excellence. Mineral filled and formed from rigid polymer, they can be removed and filled with lead shot for additional stability. The elegant feet are turned from solid brass then heavily plated with gold. reversible and adjustable spikes are fitted to give excellent results on a variety of floor surfaces.

Spoecifications

System Type: Three-way, floor standing

Enclosure Type: Single coupled cavity

Amplifier Requirements: 50 - 150 W

Frequency Response:  55 Hz to 20 kHz ±3 dB at 2m on reference axis

Sensitivity: 89 dB at 1m/2.83V (anechoic conditions)

Maximum Output: 110dB on programme peaks under typical listening conditions

System: SP3189

Drive Units

B160 bass unit (SP1312),

B160 midrange unit (SP1345),

NT25 tweeter (SP1353)

Crossover: SP2223

Nominal Impedance: 4 Ω 

Dimensions (H x W x D); 864 x 230 x 300 mm (34 x 9 x 11.8 inches)

Weight" 25.9kg (57 lbs)
Each cabinet has adjustable feet turned from solid brass and gold plated.

Krell LAT-1 loudspeakers

The Krell Lossless Acoustic Transducer (LAT) Series are the first loudspeakers engineered to Krell’s exacting standards. They are exceptional in their ability to provide accurate, high-powered reproduction without the distortions and information loss that occur in conventional loudspeaker designs.

The Krell LAT Series features massive aluminum construction. (The LAT-1 weighs approximately 250 lb.) The enclosures range from 0.75 to 1.5 inches in wall thickness. Internal midrange/tweeter sub-enclosures, where present, are also constructed of aluminum at least 1/4-inch thick. The cross-sectional shape of the enclosure is determined by a custom aluminum extrusion, the curvature of which is designed to absolutely minimize the effects of internal standing waves and external high-frequency diffraction

Such extensive use of aluminum may seem extravagant, but the sonic benefits are undeniable. Other than concrete and lead, which are not practical choices, aluminum possesses the ideal combination of structural rigidity and resonance damping characteristics. Within the audio passband, Krell LAT cabinets are sonically inert something that cannot be said about any wood or wood derivative

There is nothing “mystical” about the design of the Krell Lossless Acoustic Transducer. The goal was to design a mathematically correct loudspeaker that neither took anything away from nor added anything superfluous to the audio signal. Achieving that goal, nevertheless, took Krell down an engineering path never before travelled in the industry. The sound is pure Krell—as explosive, delicate, and immediate as music itself. And it’s exactly what you’d expect of Krell’s first loudspeaker system

The development of the Krell Lossless Acoustic Transducer LAT-1 was, at once, necessitated and made possible by the Krell CAST™—Current Audio Signal Transmission—technology. The LAT-1 is uniquely capable of reproducing the pure, exceptionally high resolution, wide-bandwidth signal delivered by Krell CAST components.

Separate crossover network assemblies are used for each driver complement (low, mid, and high). All circuitry is on 1/8-inch thick glass epoxy circuit boards with 4 oz. copper traces, ensuring low microphonics, low resistance, low inductance, and high current handling. 1st-order network at 300 Hz preserves transient response; 3rd-order Butterworth network at 2.9 kHz optimizes power response. Network inductors are all air-core pure copper designs, the largest of which is formed of 10-gauge wire, measuring 5 inches in diameter. Individually potted polypropylene WIMA capacitors are used in parallel to minimize inductance and resistance, and improve current handling. System impedance curve is extremely smooth, and sensitivity is a high 91 dB SPL at 1 meter with 1 W input. Custom gold-plated brass binding post terminals assure optimum signal transfer.

1-inch (25 mm) tweeter delivers flat response to 50 kHz. Central waveguide optimizes dispersion characteristics.

53/4-inch (15 cm) midrange features an advanced multifaceted cone that eliminates colorations induced by resonance modes. A proprietary suspension and extended voice coil assure extremely linear performance. D’Appolito midrange/tweeter configuration places the acoustic center at ear level and ensures pinpoint-accurate stereo imaging.

Custom-designed 8-inch (21 cm) woofer has extremely low free air resonance, a composite carbon fiber cone, and a butyl surround. The long-excursion design (1-inch peak to peak) is optimized for vented cabinet performance. Both the midrange and woofer employ cast magnesium-aluminum frames and are video shielded

Six-driver, three-way, floorstanding moving-coil loudspeaker.

Drive-units:

Three custom-built 8” woofers with carbon-fiber/paper composite cones

Two high-excursion 5.75” midrange units with multifaceted cone/dustcap assemblies

One 1” dual-concentric-ring tweeter with integral waveguide

Crossover Frequencies: 300 Hz, 2.9 kHz.

Crossover Type: first-order at 300Hz, third-order Butterworth network at 2.9kHz.

Frequency Response: 38 Hz-22,000 Hz, at 3 dB.

Sensitivity: 91 dB at 2.83V/1m.

Nominal Impedance: 4 Ω 

Minimum Load Impedance: 3,9 Ω 

Recommended Amplifier Power: 100 - 800 W.

Peak Output: 120 dB SPL

Technical Features: Solid aluminum enclosure varying in thickness from 0.75”–1.5” with non-parallel sides and rigid aluminum internal sub-enclosure for midrange-tweeter module

Cabinet: aluminum, 1-1.5" thick.

Finish: Available in either black or silver

Dimensions: (H x W x D) : 1387 x 356 x 318 mm (54.6" x 14" x 12.5")

Weight: 113.6kg (250 lbs)

Finishes: Black- or silver-anodized aluminum

 

Krell LAT-2 loudspeakers

KRELL LAT-2

2-way system, based on the same design principles that distinguish the Krell Lossless Acoustic Transducer concept. Sophisticated engineering and uncompromised construction result in dynamic, transparent, uncannily accurate sound reproduction rarely achieved in any speaker, regardless of size or the number of drivers.

The LAT-2's vented cabinet features two rear bass ports, precisely dimensioned and positioned with respect to the woofer to eliminate turbulence while providing the correct acoustic loading.

2nd-order Bessel crossover preserves phase coherence and optimizes power response. The optional stands are constructed from a carbon fiber composite and are acoustically matched to the LAT-2

The 7-inch (180 mm) mid-bass drive unit features the same ,multifaceted cone construction  and proprietary suspension design as the midrange units in the LAT-1. This advanced driver design simultaneously ensures extraordinary bass reproduction and midrange accuracy.

The tweeter is identical to the unit used in the LAT-1

specifications

Type:  2-way bookshelf loudspeaker with optimal stand

Enclosure Type:  Bass reflex

Drivers:

One high-excursion 7" woofer with multi-faceted cone/dust cap assembly

One 1" dual-concentric-ring tweeter with integral waveguide

Recommended Amp. Power:  100 - 350 W

Peak Output:  110 dB SPL

technical Features:  Solid aluminum enclosure varying in thickness from 0,75" - 1,0" with non-parallel sides

Frequency Response:  45 - 25,000 Hz ±3dB

Sensitivity:  87 dB SPL with 2,83 V input at 1 m

Nominal Impedance:  6 ohm

Finish:  Available in either black or silver

Dimensions (W x H x D):  264 x 356 x 356 mm (10,4" x 14" x 14")

Optional Stand - Height :  864 mm (34 in)

Weight:  34,1 kg (75 lbs)

 

Tannoy Westminster loudspeakers

Tannoy Westminster

The Tannoy Westminster presents the latest in Dual Concentric technology combined with traditional standards of construction and finish, and is a worthy successor to the renowed tannoy Autograph.

A 15" Dual Concentric drive unit is coupled to a straight axis horn at the front and to a long folded horn at the rear. The advantages of the system are as follows; Low frequencies, i.e. below 300 Hz are reproduced by a much larger radiating wavefront loudspeakers. the quality of low frequencies as perceived by a listener are more realistic since low frequency sound radiations in musical instruments, etc., are also generated by large radiating wavefronts. For example, timpani, contrabass, organ pipes (32 ft. 16 ft.) producing low frequencies naturally, all have a basic wavefront generating area much larger than even a 15-inch (380 mm) direct radiating loudspeaker system. The radiating area of the rear folded horn in the Westminster loudspeaker is over 2,5 times that of a 15 inch loudspeaker and therefore much more comparable to the original instruments. The quality of low frequency reproduction is therefore improved. The efficiency of the system, used in the Westminster is approximately 8 dB greater than conventional direct radiating systems using a 15-inch drive unit. A fundamental consequence of the increase in efficiency is a lower distortion content when operated at normal domestic sound levels. A further consequence of high efficiency is of course that the power amplifier is under much less stress when reproducing high peak transient sound levels typical of wide dynamic range digital recordings. The air load matching between drive unit and listening environment is improved by the use of compound horn techniques, therefore the drive unit is much less highly stressed in reproducing peak transient levels. The thermal dissipation in the voice coil is reduced resulting in a more linear conversion of quiet and loud passages, i.e., the true dynamic range of the programme material is retained.

Using conventional separate bass and treble units with a rear folded horn would result in an extremely large and cumbersome cabinet. The tannoy Dual Concentric drive unit has separate high and low frequency drivers within a common chassis. Integration of the drive unit and horn loading systems with the cabinet is therefore more effective and the physical size of the cabinet reduced.

In the Dual Concentric drive unit a single chassis carries both a direct radiating low frequency driver and, mounted behind and on the same axis, an HF compression driver.

When used in the Westminster with a time compensated crossover network, a single point sound source is provided for frequencies from which the listener can re-create stereo images. The result is a much clearer, more accurate stereophonic effect. Lowe frequencies which do not affect stereo imagery are reproduced through the rear folded horn.

The resulting sound quality available from the Westminster produces a sense of reality and presence which is simply not provided by any more conventional loudspeaker system.

The finishing touch to this fine loudspeaker is provided by the superbly finished cabinet, combining solid walnut mouldings and real walnut veneers with discrete oatmeal grille cloth. The centre grille is removable with a key for access to the HF response controls.

1. The compound horn construction shown in diagrammatical form with the rear horn straightened out for clarity.

2. Perspective view of Westminster cabinet showing the internal construction of the rear horn. Arrows show the direction of radiation from the drive units.

Specifications

Power Rating:  120 W RMS, 300 W Peak

Amp. Rating:  50 to 200 W RMS per channel (8 Ω)

Sensitivity:  96 dB (for 1 W at 1 m)

Maximum SPL:

117 dB at 1 m for 120 W

123 dB at 1 m for 500 W peak

Impedance:  8 Ω  (Nominal) 5,5 Ω  (Minimum)

Frequency vs SPL:  18 Hz - 20 kHz

Phase Response:  80 Hz - 10 kHz ±12° 

Time Compensation:  less than  ±10 µsec (80 Hz - 10 kHz)

Dispersion:  60°  incl. ang. Horizontal - Vertical at -6 dB at 10 kHz

Crossover Frequencies:  1 kHz electrical, 300 Hz acoustical

Crossover Control:  

±6 dB over 1 kHz to 20 kHz shelving

+3 dB to -6 dB per octave over 5 kHz to 20 kHz slope

Crossover Type:  Passive, Low loss, Time comp. type 1027

Driver Type:  Dual Concentric, High Compliance type 3839/W

Distortion

Less than 2% third harm, at half-power, 80 Hz - 20 kHz 

for 90 dB SPL less than  0,3% third harm, 50 Hz - 20 kHz 

for 110 dB SPL less than  1m4% third harm. 80 Hz - 20 kHz 

for 113 dB SPL less than  3,0% third harm. 80 Hz - 20 kHz 

Low Frequency Direct Radiator

Nominal Diameter:  380 mm (15")

Voice Coil Diameter:  52 mm (2")

Free Air Resonance:  22 Hz 

Total Q:  0,18

High Frequency Direct Radiator

Diaphragm Diameter:  51 mm (2")

Voice Coil Diameter:  51 mm (2")

Horn Lower Cut off Frequency:  250 Hz 

Enclosure Type:  Compound Horn

Rear Folded Horn:

Total Length = 3 m (10 feet)

Throat Area = 0,03m2 (49 sq in)

Mouth Area = 0,4m2 (620 sq in)

Flare Constant = 0,85 (exponential)

Front Horn

Total Length = 0,15 m (6 in)

Throat Area = 0,075m2 (116 sq in)

Mouth Area = 0,31m2 (480 sq in)

Flare Constant = 9,7

Enclosure Volume:  521 litres

Enclosure Dimensions (H x W x D):  1300 x 1030 x 631 mm

Enclosure Weight:  115 kg complete

packed Dimensions (H x W X D):  1500 x 1100 x 7200 mm

Packed Weight:  140 kg

Enclosure material:  Solid walnut with 25 mm particle board

Grille Material:  Specially woven cloth over wood frame with lock and key fixing

 

Infinity Quantum 5 loudspeakers

 Infinity Quantum 5

Hard to believe until you hear it  - and even then; that a moderately-sized speaker at a most reasonable price can house the most advanced high-and low-frequency drivers (plus a high-definition midrange dome) and set them free to operate in all their realism.

That's the beauty of the Quantum 5 by Infinity.

Our superlative EMIT and the revolutionary Infinity -Watkins Dual-Drive Woofer are vital ingredients of our formidable Quantum reference Standard speaker-and-equalization system priced at several thousand dollars.

Now the Quantum 5 - at a small fraction of the cost of the Quantum Reference Standard  - has an EMIT and a dual-voice coil woofer of its own. And a sound that would be a revelation from any size speaker, at any price.

IN a woofer, two voice-coils are better than one. In performance, our dual-voice-coil woofer is better than any other.

Impossible combination: good transient response, sufficient power, acceptable efficiency, and extended bass range - all from an enclosure of reasonable size.

Now Infinity brings you Wiliams Watkin's ingenious solution to problems of a speaker's fundamental resonance, back-EMF, and the resultant impedance peak.

The Infinity-Watkins Dual-Drive Woofer, available only in Infinity's Quantum Series speakers, works like this.

In the frequency range where rising impedance and falling response were considered inevitable, a second voice coil takes over. In the region of resonance, it presents a low impedance path to the amplifier.

Now back-EMF is reduced, so the speaker can make use of the amplifier's power at low frequencies. Now it isn't inherent resonance but input that controls the cone. Now extended bass response co-exists beautifully with accurate transient performance. Now the superb bass reproduction of the dual-voice-coil woofer is yours in a reasonably priced compact speaker, Infinity's marvelous Quantum 5.

Is this any way to treat a revolutionary woofer?

In our top-of-the-industry Quantum Reference Standard, the Watkins is the Oscar Peterson of woofers; it can loaf, and still out-perform the rest of the world. It is responsible for response only from its phenomenal floor of 18 Hz to an easy 100 Hz/

As used in the three-way Quantum 5, the revolutionary woofer handles a frequency range from 30 through 600 Hz. So we give the cone a special treatment to increase greatly its stiffness-to-mass ratio. This damping treatment eliminates a variety of circumferential modes and resonances that blur the bass and muddy the midbass in ordinary speakers. Low-frequency reproduction from the Quantum 5 is exciting in its combination of clarity with power. In the vital midrange, Quantum 5 uses Infinity's high-definition dome driver. It is exceptionally accurate in its range from 600 to 4000 Hz. And from 4000 Hz up - far up.

The superlative, soaring EMIT - clearly superior to domes and cones. And electrostatics.

In theory, the magnetic counter-part of the electrostatic tweeter would be just as clean, accurate, and high-ranging as the electrostatic - and trouble-free besides.

In fact, our exclusive EMIT with its magnets of the rare-earth substance Samarium Cobalt, the most powerful magnetic material on earth, is all of that and more.

The EMIT exhibits nearly perfect horizontal dispersion - clearly superior to electrostatics' narrow beaming of high frequencies. And EMIT, more than either electrostatics or conventional dome drivers, is capable of reproducing every transient peak, every fortissimo as accurately as every subtely in the most demanding recording. Listen.

IN scientific measurements and, more important, in listening tests, EMIT stays smooth as high as your ears can follow. beyond that, they keep going right up to 32,000 Hz. Infinity invented the Electromagnetic Induction Tweeter. And only Infinity offers you its advantages. It's standout technological advance and it blends beautifully with the midrange dome and Watkins woofer - thanks to Infinity's meticulous attention to crossover technology and phasing.

The resulting output of a Pair of Quantum 5 speakers has an almost pictorial depth. You place each musician or section front or rear, as well as left or right, as naturally as at a concert.

Specifications

Frequency Response:  38 through 32,000 Hz ±3 db

Horizontal Dispersion:  -2 dB 60°  left and Right (20 kHz)

Suggested for use with amp. or receivers of:  30 Watts to 250 watts per channel RMS

Nominal Impedance:  4 Ω 

Drivers

LF :  300 mm (12") Infinity-Watkins Dual-Drive Woofer

MR:  38 mm (1-1/2") high-definition dome midrange

HF:  EMIT tweeter

Crossover Frequencies:  600 Hz and 4,000 Hz

Level Controls: Midrange and Tweeters

Dimensions (H x W x D):  670 x 380 x 300 mm (26-1/2" x 15" x 12")

Weight (packed):  25 kg (55 lbs)

Finish:  Oiled walnut veneer or particle board;

Grille:  Black cloth removable grille.