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.

Infinity Quantum 4 loudspeakers

Infinity Quantum 4

The sound of this smallest floorstanding speaker in the Quantum Series is eloquent. It clearly proclaims that with Infinity, a music-lover who has to compromise on the cost of elements of an audio system doesn't have to suffer equal compromises on quality.

In 1976 our Quantum Line Source (height, well over five feet price well over $1000) set a whole new industry standard with the first use of superlative EMIT tweeters and the Infinity-Watkins Dual-Drive Woofer, among other advances.

 Now The Quantum 4 (much smaller size, much lower price) seems certain to set the new standard for compact three-way speakers, with an EMIT and dual-voice-coil woofer ot its own. Among other advances.

What two voice coils do for our remarkable woofer.

It has always been impossible to get good transient response, sufficient power, an acceptable level of efficiency and extended bass range from an enclosure of reasonable size. Till now.

Now William Watkins has found, and Infinity has made excellent use of, the solution to problems of a speaker's fundamental resonance, back-EMF, and the resultant impedance peak. Watkins's invention, available in Infinity speakers and no others, is a woofer with two voice-coils, called the Infinity-Watkins Dual-Drive Woofer. It works like this:

Down among the frequencies where rising impedance and falling response were inevitable before, the second voice-coil takes over. In the region of resonance, it presents a low impedance path to the amplifier.

Now the speaker can make use of the amplifier's power at low frequencies, because back EMF is reduced. Now input rather than inherent resonance can control the cone. Now extended bass response and accurate transient performance can co-exist beautifully. Now you can enjoy the superb reproduction of the Dual-Drive Woofer in a compact speaker, the Quantum 4.

Is this any way to treat a revolutionary woofer?

In our top-of-the-industry Quantum Line Source, the Infinity-Watkins is the Oscar Peterson of woofers; it can loaf, and still out-perform the rest of the world. We've made it responsible for response only from its phenomenal floor of 18 Hz to an easy 200 Hz.

As used in the Quantum 4, the revolutionary woofer handles a frequency range from 30 through 600 Hz. We give the cone a special treatment that greatly increases the ratio of its stiffness to its mass. This damping treatment eliminates a variety of distortions, circumferential modes and resonances that otherwise could blur the bass and muddy the midbass. And low frequencies from the Quantum 4 are exciting in their combination of clarity with power.

Next up in the Quantum 4 array of drivers is Infinity's high-definition dome midrange driver. In its range from 600 to 4,000 Hz it speakers nothing but the accurate truth. And above all.

EMIT - the eminent exclusive tweeter that stays smooth as high as your ears can reach - and beyond.

Infinity wrote the book on the electrostatic tweeter. It was a story of triumph over adversity. Now we/ve gone the electrostatic on better.

Electrostatics, with their low-mass diaphragms driven uniformly overall, delivered sweet undistorted reproduction of high frequencies. But they were subject to voltage break-down and tended to "beam" sound narrowly.

Our dream of creating a trouble-free magnetic counterpart of the electrostatic became a beautiful reality after we hit on the use of the magnetically powerful rare-earth material called Samarium Cobalt.

now our EMIT - with Samarium Cobalt magnet provides gloriously accurate and musical high-frequency performance minus the limitations of electrostatics, plus nearly perfect horizontal dispersion and high power capability, clear up to a superauditory 32,00 Hz.

EMIT tweeters are used in Infinity speakers. And in no other speakers in the world.

In the Quantum 4 the Dual-Drive Woofer, dome midrange driver, an EMIT, and Infinity's meticulous attention to phasing and crossover technology join together to produce startlingly lifelike stereo imaging and depth.

The sound of a pair of Quantum 4 speakers would be a joy no matter what size enclosures or what price instruments it came from, From compact speakers in the Quantum 4 price range it is a revelation .

specifications

Frequency Response:  35 through 32,000 Hz ± 3 dB 

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

Minimum Rec. Amp. Power:  30 Watts per channel RMS

Maximum Rec. Amp. Power:  250 watts per channel RMS

Nominal Impedance:  4 Ω 

Drivers

LF :  12" Infinity-Watkins Dual-Drive Woofer

MR:  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):  910 x 380 x 300 mm (36" x 15" x 12")

Weight )packed):  41 kg (90 lbs)

Finish:  Oiled walnut veneer; removable grille.

 

McIntosh LS360 loudspeakers

 McIntosh LS360

At just more than four feet tall, the magnificent LS360 is the flagship of the Academy Series. Like the CS350, its five tweeters are wired to produce a Bessel Function array. The individual tweeter amplitudes and phase relationships are adjusted so that the array acts as a high frequency point source with a broad dispersion pattern. In addition, the array greatly increases power handling for high frequencies. Two 10-inch LD/HP® woofers and an 8-inch LD/HP ® midrange round out the driver complement. This two bass ports are flared at both ends to form a natural horn and minimize air noise. The tweeters are mounted on traditional McIntosh screened black glass. Natural Cherry, red Cherry, and Black Ash finishes. Exotic woods and finishes available by special order (Piano Black).

The new McIntosh loudspeaker line results from the most ambitious speaker development project in McIntosh history. Never have McIntosh speakers and electronics enjoyed such harmony of quality, performance, and purpose.

With the McIntosh loudspeakers, from the very beginning these models have been designed for low-distortion performance, thanks to patented LD/HP® drivers and unique arched bridge truss cabinet construction. Music benefits from smooth, extended response without the coloration and fuzzy imaging caused by driver distortion and cabinet vibrations. Movie sound benefits from high power handling and fast, clean dynamic response, from the high-output LD/HP drivers.

McIntosh speakers are a true family, sharing a common tonal quality that allows for great configuration flexibility. Virtually any combination of speakers can be used in multichannel applications. High-end loudspeaker in particular are often characterized by just one aspect of their performance. It could be bass response, treble transparency, depth of image, cosmetic appearance, or even price. In all of its products, however, McIntosh seeks balance, and so is the case with speakers. McIntosh speakers certainly have an extremely smooth and broad frequency response, and they do “measure” well in front of a microphone and spectrum analyzer. But in the final analysis, they are distinguished by their sheer musicality, which can only be measured by listening.

LD/HP® Drivers

In LD/HP driver, a pair of aluminum shorting sleeves makes the magnetic field more symmetrical and reduces distortion. The sleeves also lower the impedance of the voice coil, permitting greater current flow and hence higher output levels.

Specifications

Anechoic Response:  29 Hz to 20 kHz ±2 dB 

Sensitivity (2,8V/1m):  88 dB 

Nominal Impedance:  4 Ω 

Drivers

LF :  Two 10” LD/HP woofer

MF :  One 8” LD/HP Midrange

HF :  Five 1” dome tweeter

Crossover Frequency:  200 Hz, 1,500 Hz

Suggested Amp Power:  200 – 600 watts

Dimensions (W x H x D):  343 x 1251 x 441 mm (13,5” x 49,25” x 17,38”)

Weight (Boxed each):  80 kg (176 lbs)

McIntosh LS340 loudspeaker

McIntosh LS340

Standing a little more than three feet tall, the elegant LS340 is a three-way design with dual 8-inch LD/HP® woofers. Like the LS320 its tweeter has a special low-diffraction mounting that reduces the “edge hole” effect – cancellation of certain frequencies caused by diffraction at the edge of the cabinet. The bass port is flared at both ends to form a natural horn and minimize air noise. As in all LS models, the tweeter is mounted on traditional McIntosh  screened black glass. Natural Cherry, Red Cherry, and Black Ash finishes. Exotic woods and finishes available by special order.

Specifications

Anechoic Response:  48 Hz -  20 kHz ±2 dB

Sensitivity (2,8 V/1 M):  87 dB

Nominal Impedance:  4 Ω 

Drivers

LF :  Two 8” LD/HP woofer

MF :  One 6,5” LD/HP midrange

HF :  1” dome tweeter

Crossover Frequencies:  250 Hz, 1,5 kHz

Suggested Amp Power:  100 – 350 Watts

Dimensions (W x H x D): 260 x 1022 x 441 mm (10,25” x 40,25” x 17,38”)

Weight (Boxed each):  50 kg (110 lb)

 

McIntosh LS320 loudspeakers

McIntosh LS320

Although it’s one of the smallest loudspeakers ever crafted by McIntosh, the LS320 delivers full-bodied sound, thanks to its 8-inch LD/HP(R) woofer. The tweeter features a special low-difraction mounting that reduces the “edge hole” effect – cancellation of certain frequencies caused by diffraction at the edge of the cabinet. As in all LS models, the tweeter is mounted on traditional McIntosh screened black glass. Natural Cherry, Red Cherry, and black Ash finishes. Exotic woods and finishes available by special order.

Specifications

Anechoic Response:  6 Hz -  20 kHz ±2 dB

Sensitivity (2,8 V/1 M):  86 dB

Nominal Impedance:  4 Ω 

Drivers

LF :  8” LD/HP woofer

HF :  1” dome tweeter

Crossover Frequencies:   1,5 kHz

Suggested Amp Power:  50 – 200 Watts

Dimensions (W x H x D): 260 x 432 x 270 mm (10,25” x 17” x 10,625”)

Weight (Boxed each):  15 kg (33 lb)

 

Toshiba SS-47 loudspeakers

3-way concave speaker system

3-step tweeter/mid-range tone control

Terminals for electronic cross-over multi-channel system

Natural walnut cabinet with removable grill panel

Specifications

Enclosure:  Infinite Baffle type

Mounted Speakers:

Woofer :  300 mm (12") concave

Mid-range :  120 mm (5") concave

Tweeter :  25 mm (1") dome

Frequency Range:  35 - 20,000 Hz

Crossover Frequency:  700 Hz (Low/Mid-range);  7,000 Hz (Mid/High)

Power Handling Capacity:  50 W Max.

Impedance:  8 Ω

Sensitivity:  93 dB /IEC

Fundamental resonance Frequency:  60 Hz

Timber Control:  Tweeter/Mid-range 3-step ±3 dB

Multi-amp. Connection:  2 & 3 way

Front Panel:  removable 

Dimensions (W x H x D):  400 x 680 x 330 mm (15-3/4" x 26-3/4" x 13")

Weight: 15 kg (33 lbs)

Toshiba SS-37 loudspeakers

3-way speaker system

3-step tweeter/midrange tone control

Terminals for electronic cross-over multi-channel system

Natural walnut cabinet with removable grill panel

Specifications

Enclosure:  Infinite Baffle type

Mounted Speakers:

Woofer :  200 mm (8") concave

Mid-range :  120 mm (5") concave

Tweeter :  25 mm (1") dome

Frequency Range:  40 - 20,000 Hz

Crossover Frequency:  700 Hz (Low/Mid-range);  7,000 Hz (Mid/High)

Power Handling Capacity:  40 W Max.

Impedance:  8 Ω

Sensitivity:  92 dB /IEC

Fundamental Resonance Frequency:  65 Hz

Timber Control:  tweeter/Mid-range 3-step ±3 dB

Dimensions (W x H x D):  342 x 590 x 295 mm (13-7/16" x 23-1/4" x 11-5/8")

Weight: 10 kg (22 lbs)

Toshiba SS-27 speakers

2-way speaker system

3-way high frequency level control

Mellow walnut cabinet with removable grill panel

Specifications

Enclosure:  Infinite Baffle type

Mounted Speakers:

Woofer :  200 mm (8") concave

Tweeter :  25 mm (1"0 dome

Frequency Range:  45 - 20,000 Hz

Crossover Frequency:  7,000 Hz

Power Handling Capacity:  30 W Max.

Impedance:  8 Ω

Sensitivity:  93 dB /IEC

Fundamental resonance Frequency:  85 Hz

Timber Control:  High 3-step ±3 dB

Dimensions (W x H x D):  300 x 500 x 252 mm (11-13/16" x 19-11/16" x 10")

Weight: 6 kg (13- 1/4 lbs)

Jensen SG-300 Sigma speaker

 Jensen brings you an advanced 12" version of the famous Triaxial loudspeaker

Many years ago Jensen introduced the G-610 Triaxial 3-way loudspeaker, three acoustically and electronically independent loudspeakers in one unitary assembly. It made history as the first 3-way system and embodied the first horn-loaded compression driver supertweeter to be used in a commercial high fidelity loudspeaker. When this 15" speaker was installed in a large enclosure,, the sound was truly awe inspiring.

Now Jensen has created the SG-300 Triax® . It is scaled down in dimensions and will go in a compact shelf-size enclosure. It retains all of the important original concepts, is even more advanced in its use of the Flexair® high-compliance long-travel surround and Syntox-6 magnetic structure in the woofer. 

The Jensen Sigma Series  of  high fidelity unitary loudspeakers offers a comprehensive range of six 12" and three 8" models to suit most every unitary application. This brilliant Series of loudspeakers embodies every advance in acoustic design, every wanted feature of convenience, performance and high reliability.

SG-300 Triax® 12" 3-way unitary loudspeaker

Jensen's newest exclusive, a true 3-way 12" unitary hi-fi speaker. The Flexair® woofer and Syntox-6® magnet structure produce rock-bottom bass to 20 Hz. A low-distortion compression midrange uses the woofer cone as its horn mouth. The cast support bar contains a new horn-loaded compression super-tweeter which delivers response well past 20 kHz. 

Specifications:

Nominal Size:  12”

Power Rating:  30 watts

Frequency Range:  20 – 20,000 Hz

Impedance:  8 ohm

Crossover:  600 Hz, 4000 Hz

Balance Control:  Mid/High Frequency

Woofer Resonance:  25 Hz

Dimensions:  12-3/8” diameter;  8-1/8 deep

Connections:  Push Type Binding post

Weight:  15 lbs (shipping)

Scientific Fidelity Tesla loudspeakers

Scientific fidelity Tesla

Tesla’s Name

Tesla is named after Nichola Tesla, the only man to understand electricity in his soul. He was the inventor of A/C electricity, making transformers and therefore long distance energy transmission possible. George Westinghouse gave him his start, Thomas Edison took credit for most of his inventions, and J. P. Morgan ( the owner of General Electric at the time) crushed him.

He died a broken and forgotten man.

this speaker is dedicated to him.

Tesla’s woofers

The woofers that are used in Tesla are Scientific Fidelity’s own Design, employing many unique features.

Long throw-soft suspension design

To avoid dynamic compression (the problem of having less and less relative bass the louder you turn it up), which is caused by the woofer’s increasing stiffness as it gols through its travel, a very long voice coil and a soft compliant suspension have been selected.

R.I.D.S.

the aforementioned system simply consists of two foam gaskets (one in front of the woofer frame and one behind it), and a compression ring to hold the woofer against the cabinet so that no part of the woofer frame touches the cabinet.

Carbon Fiber Cone

carbon fiber is very strong, yet lightweight, when woven into cloth, soaked in resin and then pressed into a cone shape it becomes an extremely rigid piston.

Aluminum Phase Plug

by extending the pole-piece completely through the voice coil to the front of the speaker, heat is conducted away from the voice coil in both directions (providing a highly conductive material, such as aluminum, is used) and power handling is greatly increased.

High Loss Norsorex Surround

a high loss surround not only flexes freele at low frequencies but also absorbs energy at high frequencies so that it damps any edge ringing norsorex is currently one of the best materials for this purpose

Edge-Wound Copper Ribbon Voice Coil

ribbon wire is superior for conducting heat away from the center of the voice coil. It also puts more conductor in the gap than any other type of wire.

Tesla’s Finish

Tesla’s beautiful wood finishes (Rosewood, Teak and Ash) are all obtained using obiche wood. Obiche is a fast growing tree from the country of Cameroon, which has some of the best forest management in the world. In Cameroon, 80% of their forests are protected by law. Only 20% are open for commercial production, and in that 20% only one obiche tree is allowed to be cut per acre per year, and that tree must be over 200 inches in circumference.

This is a sustainable process so long as the trees are cut in this manner three will always be obiche trees.

Specifications

Type:  floor-standing , two-way, reflex-loaded,

Speakers Configuration:  D'Appolito- type, woofer-tweeter-woofer configuration.

Drivers:

Low  Frequency :   two 6.5" bass-midranges

High Frequency : 1" Vifa aluminum-dome tweeter

Frequency Response:  32 Hz – 35 kHz +-3 dB

Sensitivity:  88 dB (1 W/1 m)

Impedance:  8 Ω 

Crossover Frequency:  1000 Hz

Power Requirements:  20 Watts or more

Dimensions (H x W x D):   49” x 8” x 13”

Weight:  22,68 kg (50 lbs)

 

Elac 1 Series 105 speakers

Good style has a name, and costs almost nothing.

For µsec, music is an indispensable part of life, happiness. Joy, relaxation, social medium. In your living room, it is not only musical excellence that makes quality, but also the physical presence of the loudspeakers; they must be beautiful, modern and easy to integrate, and  - affordable.

The new 1 Series unites all the virtues of loudspeaker culture:

Natural sound, individual design, advanced technology.

For the 1 Series, new drive units have been developed : tweeters whose wave guide models especially the horizontal dispersion and lends the loudspeaker a dynamic outward appearance; woofers that show the Elac design classic - the aluminum membrane - in an anodised version for the first time.

Graceful floor standing speakers and compact monitors provides adequate set up options for any room - as a home theatre set, or as a classical stereo set.

Elac 105

Graceful 2-way floor-standing speaker with elegant driver style through anodised aluminium woofers and dynamically curved wave guide of the tweeter.

Specifications

Type: 2-way bass reflex d'Appolito configuration

Drivers:

low Frequency :  2 x 140 mm Midrange-Woofer

High Frequency :  1 x 24 mm tweeter

Crossover Frequency:  3,800 Hz

Nominal Power:  80 W, 

Music Power:  120 W

Impedance: 4 Ohm

Frequency Response:  40 - 22,000 Hz

Efficiency:  86 dB

Recommended Amplifier Power:  20 - 150 W

Dimensions (W x H x D):  900 x 180 x 252 mm

weight:  11.4 kg

Finishes: matt black, silver, cherry

 

Focal Chorus 806V speakers

For Focal, Chorus symbolizes one of the most stimulating challenges for the loudspeaker and refined product manufacturer that we are: to allow the greatest number of consumers to access our technological innovations. For the first two generations Chorus (2000) and Chorus S (2003), the objective was to conserve a hi-end sound and maintain sophisticated Focal technologies by adapting our industrial machine to the highest standards. While outsourcing had become a key economic strategy for the majority of manufacturers, we chose on the contrary to heavily invest in our manufacturing process in order to achieve an exceptional sound quality while at the same time remaining competitive. It is the only possible way in this path of permanent innovation: development and manufacturing of loudspeakers ”Made in France”, design by cabinet-makers, mastery of quality, total autonomy in the design and development of our products. This strategy has been key to the success of the preceding Chorus lines.

This third generation known as Chorus 800 V will go even further in this strategy. Technological innovation does not only solely touch strategic components of the speaker, but the actual whole of the design. Thanks to the use of advanced and exclusive materials, elaborate manufacturing techniques of the cabinets, the Chorus 800 V line of today shines with a unique, hi-end esthetic. Chorus V isn’t only a performing product line, ideal for entering the Focal universe, but objects that will inhabit living spaces, with an innovative esthetic, quality of manufacture and a finish worthy of a higher segment. This is indeed a new esthetic dimension, a new era for the ”Spirit of Sound”.

 

Neutral and balanced, the Chorus 806 V seduces by the richness of its upper midrange and the speed of its bass. An entirely refined speaker, ideal to play in rooms under 20 m2 without any limits. And easily larger spaces if it is combined with SW 800 V.

 

Specifications

Type:  2-way bass-reflex bookshelf speaker

Drivers:

Low Frequency:  165 mm (6-1/2") Polyglass mid-bass

High Frequency:  25 mm (1") TNV AL/Mg Inverted dome tweeter

Frequency Response:  55 Hz - 28 kHz (±3 dB)

Low Frequency Point:  77 Hz (-6 dB)

Sensitivity:  90 dB (2.83 V/1 m)

Nominal Impedance:  8 Ω 

Minimum Impedance:  3,6 Ω 

Crossover Frequency:  3,000 Hz

Recommended Amplifier Power:  25 - 120 W

Dimensions (HxWxD):  390 x222 x 293 mm (15-3/8" x 8-3/4" x 11-9/16")

Net Weight:  8,2 kg  (18 lbs)

 

Focal Chorus 705V speakers

Since the year 2000, the different generations of the Chorus line have benefited from this approach, as we produced speakers that cost less and performed better. To achieve this goal, we invested massively in a superior method to speaker manufacturing, where intelligent machining and precise handwork were absolutely necessary.

It was the only possible way in this drive for quality and competitiveness: development and manufacturing of French-made loudspeakers, design of the cabinets, quality control, a total autonomy in the development and design of our own products. This method allows us to innovate, to entirely and independently turn ideas into reality, to place patents internationally, and have the means to anticipate trends. And finally, to progress.

The third generation, Chorus 700 V, goes even further. A direct descendant of the Chorus 800 V line of which it heavily borrows technical elements (except Power flow) yet with a more Amati traditional finish, Chorus 700 V invites you in to the Focal universe. The build quality and high-end finishing work are entirely unknown in this price-range.

 

Chorus 705 V is the ideal loudspeaker for installation in rooms of modest dimensions (approximately 15 m²). With a responsive and lively bass, it represents the foundations of a great system, especially when paired with the SW 700 V subwoofer.

 

Specifications

Type:  2-way bass-reflex bookshelf speaker, wall mounting.

Drivers:

Low Frequency:  140 mm (5") Polyglass midbass

High Frequency:  25 mm (1") TNV AL./Mg Inverted dome tweeter

Frequency Response:  65 Hz - 28 kHz (±3 dB)

Low Frequency Point:  57 Hz (-6 dB)

Sensitivity:  89 dB (2.83 V/1 m)

Nominal Impedance:  8 Ω 

Minimum Impedance:  3 Ω 

Crossover Frequency:  3,000 Hz

Recommended Amplifier Power:  25 - 100 W

Dimensions (HxWxD):  315 x192 x 248 mm (12-3/8" x 7-9/16" x 9-3/4")

Net Weight:  5,7 kg  (12,5 lbs)

Castle Harlech speakers

Rather than sacrifice the superb stereo imaging that result from a narrow cabinet, Castle has employed two small polypropylene coned mid/bass drive units in the Harlech -  on the top and one on the front face - instead of a larger mid/bass drive unit.

Each driver works with its own Quarter Wave pipe tuned to different frequencies but which join in a common vent at the speaker's base. The two drive units give exceptional bass extension and superior control but also radiate midrange energy into the room in a way that produces a large, spacious sound with very low distortion.

 

Quarter Wave

Competing speaker systems set themselves apart by the techniques with which bass extension is achieved. For the largest models in its range of floor-standing speakers Castle has adopted Quarter Wave loading. This technique can be traced back to the work of the legendary Paul Voigt inn the 1930s and has more in common with vibrating columns of air in organ pipes and folded horns that with alternative methods of bass extension like reflex or transmission line loading.

Designer Roger Loughton's execution of Quarter Wave techniques for Castle uses the latest measurement and optimisation techniques. The open, natural quality of attuned pipe has been retained in a tapered version that, with the drive unit at an optimum position along the pipe, reduces unwanted excitation at the fundamental frequency of the pipe and associated harmonics by natural acoustic filtering. Tapering the pipe also allows it to be folded inside the cabinet that not only brings it down to domestic size but enables the internal structure considerably to add to the rigidity of the enclosure.

The superiority of the Quarter Wave technique, correctly executed, over orthodox reflex loading with a cabinet of the same or bigger size is higher bass efficiency, maintained down to a lower frequency. Quarter Wave systems have the natural power and character of true, deep bass.

 

Specifications

Frequency Response:  40 Hz - 22,000 Hz

Nominal Impedance:  8 Ω

Sensitivity:  88 dB for 1 W at 1 m

Amplifier Requirements:  25 - 150 watts

System Type:  Quarter Wave

Bass Unit:  Twin 130 mm in a cast chassis with injection moulded cone

Treble Unit:  25 mm metal dome

Dimensions (W x H x D):  200 x 940 x 320 mm

Weight:  48 kg (packed)