What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Technics SL-PS70

 The Technics SL-PS70 with its D/A converter section including MASH 1-bit DAC (multi-stage noise shaping), was able to perform distortion-free reproduction of low-level signals, as well as micro-signals embedded in large signals. The unit used a multi-layer vibration-resistant construction and centre mechanism, which thoroughly eliminated vibration and resonance, as well as four large insulators that reduced vibration from the floor. The line Out circuits included Technics' unique Class AA circuitry.  Also, the power supply circuitry was structured with the audio circuitry specifically independent from the transformer coils. In addition, for comprehensive operation convenience, functionality included CD editing with normal time edit and just time edit selectable, and time fade enabling automatic fadeout.

MASH - Multi-Stage Noise Shaping, is an effective oversampling D/A conversion technique which realizes a high Signal-to-Noise ratio and needs no highly complex manufacturing processes such as a laser trimming. MASH is a trademark of NTT.
Audio Section
Number of Channels:  two, stereo
Frequency Response:  2 - 20,000 Hz ±0,3 dB
Output Voltage:  2 V (at 0 dB0
Dynamic Range:  96 dB
Signal-to-Noise Ratio:  112 dB
Total Harmonic Distortion :   0,003% 91 kHz, 0 dB)
Wow and Flutter:  below measurable limit
D/A Converter:  MASH (8 DAC)
Output Impedance:  approx 1 k Ω
Load Impedance:  more than 10 k Ω
Headphone Output level:  15 mW max. 32 Ω (adjustable)
Pickup Wavelenght:  780 nm
Power Supply:  110 - 127 V; 220 - 240 V, AC 50/60 Hz
Power Consumption:  11 W
Dimensiond (W x H x D):  430 x 126,5 x 332,5 mm
Weight:  5,2 kg

Pioneer PD-6500

 PD-6500 features:
Direct linear conversion.
1-bit D / A converter with double noise reduction.
8-times 20-bit digital oversampling filter
Intelligent digital servo: continuous accurate tracking with no thermal drift.
Simple lightweight laser pickup: reduces read errors and provides an accurate signal.
Anti-resonance and vibration design.
Disc stabilizer; honeycomb chassis; big feet; disc drive with low center of gravity;  engine equipped with ceramic shaft.
Audio Section
Type:  Compact disc digital audio system
Number od Channels: 2-channel stereo
Frequency Response:  2 Hz - 20 kHz
Signal-to-Noise Ratio:  106 dB or more
Dynamic Range:  96 dB or more
Channel Separation:  98 dB or more
Total Harmonic Distortion: 0,0027% or less
Output Voltage:  2,0 V
Wow and Flutter:  Limit of measurement (±0,001% W PEAK) or less
Requirements:  AC 110/120 - 220/240 V 50/60 Hz
Consumption:  16 W
Dimensions (W x H x D):  420 x 326 x 106 mm (16-9/16" x 12-13/16" x 4-3/16")
Weight: 4,3 kg (9 lb 8 oz)

Kenwood KW-6044

 Surround Sonic Stereo Tape Deck Model KW-6044
Kenwood's premier attempt at 4-channel reproduction with its unique four independent pre-amplifiers, the KW-6044 also includes an especially engineered playback head for ultra-high signal-to-noise ratio performance plus extended frequency response. The KW-6044's built-in 4 independent VU meters and level controls guarantee top-flighy accurate channel balance. Its motor offers stable ratation, low-low wow and flutter, and only the tiniest vibrations. The revolutionary space sounds are perfectly enjoyable.
 Special Features:
4-Channel Reproduction
The KW-604 is capable for the complete playback of discrete type 4-channel tape as it has 4 independent pre-amplifiers. The especially engineered playback head ensures superb performance with high S/N and extended frequency response. The exciting surround sonic effect is fully enjoyable.
Perfect Checking System
The 4-channel reproduction requires precise and severe blance check between each channel level. KW-6044 is quite ready for getting and monitoring the ideal channel balance, thanks to the built-in 4 independent VU meters and level controls.
Responsible Driving Motor
The newly designed driving motor is used in KW-6044. it  provides stable rotation with low-low wow and flutter and far less vibrations. Its supporting method-one point at the center-is also very effective for minimizing the operating noises.
Tape Selector
The recording and playback charactereistics of the regular tape and low noise tape are considerably different. The KW-6044 is equipped with the Tape Selector which gives the suitable recording bias frequency to each tape. The superb efficiency of the current low nooise tape is fully enjoyable.
Headphones Jack
By the front/rear switch attached, the performance of each channel can be monitored through headphones.
2-Channel Recording
The KW-6044 features the precise individual level controls with indicating lamps which permit to enjoy complete 2-channel recording. The recording condition can be the separated recording and playback heads.
Number of Heads:  3 Heads
4 Track 2 Channel Erase
4 Track 2 Channel Record
4 Track 4 Channel Playback
Record/Playback System:
4 Track 4-Channel Playback
4 Track Stereo/Mono Recording and Playback
Tape Speeds:
7-1/2 ips (19 cm/sec)
3-3/4 ips (9,5 cm/sec)
1-7/8 ips (4,75 cm/sec)
Reel Size:  Standard NAB 7" maximum
Frequency Response:
20 - 20,000 Hz at 7-1/2 ips (19 cm/sec)
30 - 15,000 Hz at 3-3/4 ips (9,5 cm/sec)
40 - 7,000 Hz at 1-7/8 ips (4,75 cm/sec)
Signal-to-Noise Ratio:  better than 47 dB at 7-1/2 ips
Total Harmonic Distortion: less than 0,5% at 0 dB (0,775 V)
Wow and Flutter:
Less than 0,12% at 7-1/2 ips (19 cm/sec)
Less than 0,18% at 3-3/4 ips (9,5 cm/sec)
Less than 0,25% at 1-7/8 ips (4,75 cm/sec)
Recording Tome (wwith 1800 feet tape):
90 min at 7-1/2 ips (19 cm/sec)
180 min at 3-3/4 ips (9,5 cm/sec)
360 min at 1-7/8 ips (4,75 cm/sec)
Fast /Rewind Time:  within 150 sec with 1,200 feet tape
Level Indication:  four VU meters
Record :  standard recording level at 0 VU
Playback :  0 dB line output 0 VU
Inputs Sensitivity/Impedance:
Two Microphone :  63  dB (0,55 mV/ 50 k Ω
Two Line :  18 dB (100 mV)/100 k Ω
Outputs Level:
Four Line :  0 dB (0,75 V)
Headphone Jack :  28 dB (30 mV)/8 Ω
DIN Connector
Input Side Sensitivity:  38 dB (9,8 mV)/
Output Side level :  0 dB (0,775 V)
Equalizer:  NAB standard
Semiconductors:  28 Transistors; 10 Diodes
Operating Position:  Horizontal or Vertical
Power Requirements:  100; 120; 230; 250 V 50/60 Hz
Power Consumption:  55 watts
Dimensions (W x H x D):  416 x 398 x 175 mm (16" x 15-1/2" x 7")
Weight:  10 kg (22 lbs)
Optional Accessories:  Plastic dust cover SR-22

Rotel RA-211

Stereo Pre-Main Amplifier
Her is RA-211, a fully packed amplifier at modest cost. With power capability of 10 W + 10 W RMS continuous power both channels driven at wide frequency response and negligible distortion, this amplifier can outperform other amplifiers of similar costs.
Besides all necessary controls, RA-211 also has connections for two pair of speakers you can use individually or simultaneously, a convenient loudness switch, and tape monitor facility. And Rotel's trdition of excellent quality built into this small but superb machine.

RA-211 Special Featiures
Ample power for true high fidelity sound
All soild state electronic design
All silicon output transistors
Handsomely trimmed aluminum extrusion panel
Simple and easy-to-operate layout of controls
Rotary - Bass, Treble, Balance, Volume and Function Selector
Pushbuttons - Power, Speaker system 1, Speaker System 2, Loudness and Tape Monitor
Convenient headphone jack and power beacon
Facilities for magnetic and ceramic phonos, tuner, tape recorder and auxiliary component
Wood cabinet included

Total Music Power (IHF):  50 W at 4 Ω
Continuous Power (RMS) [all less than 1% T.H.D. at 1 kHz]:
16 W + 16 W each channel driven at 4 Ω
12 W + 12 W each channel driven at 8 Ω
13 W + 13 W both channels driven at 4 Ω
10 W + 10 W both channels driven at 8 Ω
Total Harmonic Distortion:  0,2% (at 9 W + 9 W RMS, 8 Ω)
IM Distortion:  0,6% (at 9 W + 9 W RMS, 8 Ω)
Frequency Response:  20 to 65,000 Hz -3 dB at 8 Ω
Power Bandwidth (IHF):  20 to 35,000 Hz at 8 Ω
Input Sensitivity/Impedance:
Phono Mag 1:  2,7 mV? 45 k Ω
Phono Ceramic 2 :  140 mV/100 k Ω
Tuner, Aux : 170 mV/50 k Ω
Tape Monitor In : 150 mV/50 k Ω
Tape DIN:  330 mV/100 k Ω
Signal-to-Noise Ratio:
Phono :  63 dB
Aux :  70 dB
Tuner, Tape IN :  70 dB
Residual Noise:  1,5 mV
Damping Factor:  35 at 8 Ω
Loudness Control:  +8 dB at 50 Hz ; +3 dB at 10 kHz
Bass:  ±10 dB at 50 Hz
Treble :  ±10 dB at 10 kHz
Phono Overload:  80 mV
Phono Equalizer:  RIAA
Crosstalk:  -45 dB
Dimensions (W x H x D):  13" x 4" x 6,5"
Weight:  4 kg (9 lbs)

Denon PRA-1001

 Solid State Stereo Control Amplifier PRA-1001 (1978)
Pursuing the fundamentals of control amplifiers, this product is a result of looking into their functions, performance, design and other related problems. All the functions are incorporated.
A 7 transistor equalizer amplifier with 2-stage differential amplifier, current mirror circuit, last stage Class A pure complementary push-pull coupling.
Low distortion tone control circuitry of the NF type by means of passing through a complementary push-pull buffer with differential and inverted amplifier circuits.
Unique low distortion filter circuit capable of changing the cut-off frequency by change over to an independent filter amplifier
Distinct localization of the sound image with separation characteristics of 80 dB (20 Hz - 20 kHz)

Type:  all silicon transistor stereo control amplifier
Input Sensitivity/Impedance:
Phono 1 :  3,2 mV/50 k Ω
Phono 2 :  3,2 mV/30, 50, 100 k Ω
Max. Allowable Input:  300 mV (1 kHz)
RIAA Deviation:  ±0,2 dB (20 Hz - 20 kHz)
Max. Output/Rated Output:  10 V/1 V
Total Harmonic Distortion:  0,003%
Frequency Response:  10 Hz - 100 kHz (+0,1  -0,5 dB)
Signal-to-Noise Ratio (IHF A network):  better than 78 dB
Gain Control:  0, -10, -20 dB
Filter:  10 Hz ; 40 Hz (18 dB/oct)  7  kHz ; 14 kHz (18 dB/oct)
Crosstalk:  -80 dB (20 Hz - 1khz - 20 kHz)[Phono In - output defeat]
Power :
Supply:  AC 120 V 60 Hz; 220/240 V 50/60 Hz
Consumption:  18 W
Dimensions (W x H x D):  410 x 152 x 271 mm
Weight:  8 kg

Denon POA-1001

 Solid State Stereo Power Amplifier POA-1001 (1978)
Usually for large output power amplifiers, a large number of power transistors are used in parallel, making it difficult to bring out its characyeristics. POA-1001, for the first time, was able to realize 100 W + 100 W by a single push-pull, proving that good sound reproduction is an absolute condition.
To the last stage transistor, which constitutes a decisive factor in the performance of a power amplifier, a newly developed bipolar power transistor with a collector loss of 150 W used after making every possible improvement in the switching characteristics. Balance drive system by 2-stage differential amplifier current mirror circuit.
Independent left and right power transformers, rectified circuitry, completely monaural constitution.
Oversized capacitor 88,000 µF and oversized heat sink.

Type:  Silicon transistor, DC power Amplifier
Rated Output (both channel driven):
125 W (RMS at each channel) at 4 Ω 20 Hz - 20 kHz
100 W (RMS at each channel) at 8 Ω 20 Hz - 20 kHz
Total Harmonic Distortion (at rated ouput):  0,05% (20 Hz - 20 kHz)
Intermodulation Distortion (60 Hz/7 kHz:4/1):  0,05%
Power Bandwidth:  3 Hz - 70 kHz
Frequency Response:  3 Hz - 100 kHz
Input Sensitivity/Impedance:  1 V (RMS)/ 50 k Ω
Output Impedance:  0,08 Ω
Damping Factor:  100 (at 8 Ω)
Signal-to-Noise Ratio:  110 dB
Low Filter:  10 Hz (18 dB/oct)
Supply :  AC 120 V 60 Hz; AC 220/240 V 50/60 Hz
Consumption :  250 W
Dimensions (W x H x D):  410 x 200 x 280 mm
Weight:  22 kg


Hi-Fi U-Turn Quick Auto-Reverse Cassette Deck with Flip Reverse Head - Our exclusive rotating head design permits precise azimuth alignment of the heads to ensure wide and extended frequency response in both directions.
Computer-controlled two-motor full-logic mechanism
"Silent mechanism" for driving head assembly
SA head for low noise and distortion
"Direct" input for direct connection with CD player, etc.
Dolby HX-Pro circuit for improved response
Dolby HX-Pro makes the dynamic range of taped recordings compatible with digital sources by dynamically adjusting bias according to the level of music.

 LC-OFC coil and lead wiring in heads for higher purity
Separate circuit construction for low interference
Low-impedance voltage-tracking regulated power supply
High-rigidity chassis and large insulators for low resonance and vibration
Fluorescent Digital Peak Display, level meters and digital counter
Auto rec mute, Music Scan, Blank Skip, A-B Repeat, Timer start (record/play) Auto tape selector
Headphone output with volume control
Frequency Response  at -20 VU:
Metal Tape :  15 - 19,000 Hz (20 - 17,000 ±3 dB)
SA/Chrome Tape :  15 -18,000 Hz (20 - 16,000 Hz ±3 dB)
Normal Tape :  15 -18,000 Hz (20 - 16,000 Hz ±3 dB)
Signal-to-Noise  Ratio :  58 dB (metal tape)
Wow and Flutter :  0,05% (WRMS)
Crosstalk (1 kHz):  60 dB
Channel Separation (1 kHz):  40 dB
Harmonic Distortion
Totaal (0 VU, 1 kHz):  1,0% (metal)
K3 (0 VU, 1 kHz) :  0,5% (metal)
Record/Playback:  SA (Sen-Alloy) head
Erese :  Two-gap ferrite head
Input Sensitivity/Impedance:  80mV/50 k Ω
Line Out :  300 mV/500 kΩ
Headphones :  0-1 mW/8 Ω (matching impedance 8 - 1 k Ω)
Dimensions (W x H x D):  435 x 132 x 335 mm (17-3/16" x 5-1/4" x 13-1/4")
Weight:  6,8 kg (15 lbs)

JVC TD-V 621

Discrette Three-Head Cassette Deck
Pure, dynamic tape sound and exceptional ease of use.
The design goals of our cassette decks were the performance up to a par with dynamic digital sound and the computer-controlled convenience to match. As you see, we scored high on both counts.
 High rigidity, low resonsnce and low vibration.

Harmful "acoustic modulation noise" the source of fuzzy and muddy sound, is suppressed by using a rigid die-cast aluminum base for the head drive mechanism, cassette stabilizing pad and large insulators
Auto DDRP (Dynamics Detection Recording Processor)
The DDRP is another automatic convenience made possible by JVC's COMPU LINK Control System. Just touch the "DDRP" button on a CD player, and recording levels for CD are optimized and programmed tracks are recorded, all automatically. What's more, the output from the CD player is automatically set to bypass the recording level control in the deck so it's fed to the record head directly. To maximize the performance of each tape, the input sensitivity is automatically set by type (normal/chrome and metal). So with DDRP we've entriely eliminated the chore of adjusting recording level for best results every time you record different CDs using different tapes.
 JVC COMPU LINK Control System with sync convenience
Mate our COMPU LINK cassette decks with COMPU LINK components, and they operate interactively with each other when using our cassette decks with our CD players, for example you can operate three hours continuously or record on two tappes simultaneously.

Monitor capable discrete 3-head configuration; "Fine" amorphous heads for better high-frequency response and low wear.
Computer-controlled full-logic control - It makes comfortable touch operation, direct control of tape and remote control operation yours to enjoy.
Silent mechanism for driving head assembly
Closed-loop dual-capstan drive - In a closed-loop dual-capstan drive, the tape, as it runs across the heads, is isolated from vibration. Better response and lower intermodulation noise are the results.
Low-resonance designs; Die-cast aluminum base for mechanism, high-specific-gravity front panel, cassette-shell stabilizer, large insulators
2" Direct inputs for direct connection with CD player, etc.
PCOCC coil and lead wiring in heads - A fine amorphous head combines better high-frequency response and low wear. Highly pure copper wiring called PCOCC in heads ensures signal purity and clarity.
Separate circuit construction for low interference
DC-configured amps on separate PC boards
Low-impedance voltage-tracking regulated power supply
Dolby HX-Pro and double Dolby B/C noise reductionsystems with MPX filter
Fluorescent Digital peak Display, level meters and digital counter
Auto Rec Mute, Music Scan, Timer start (record/play), Auto tape selector
Headphone output with volume control
Bias control for flat response from any tape
Balance control
Gold-plated terminals

Frequency Response  at -20 VU:
Metal Tape :  10 - 22,000 Hz (15 - 20,000 ±3 dB)
SA/Chrome Tape :  10 -20,000 Hz (15 - 18,000 Hz ±3 dB)
Normal Tape :  10 -20,000 Hz (15 - 18,000 Hz ±3 dB)
Signal-to-Noise  Ratio :  59 dB (metal tape)
Wow and Flutter :  0,035% (WRMS)
Crosstalk (1 kHz):  65 dB
Channel Separation (1 kHz):  40 dB
Harmonic Distortion
Totaal (0 VU, 1 kHz):  1,0% (metal)
K3 (0 VU, 1 kHz) :  0,5% (metal)
Record/Playback:  Discrete 3-head configuration, fine amorphous heads for recording and playback
Erese :  Two-gap ferrite head
Input Sensitivity/Impedance: 80mV/50 k Ω
Line Out :  300 mV/600 Ω
Headphones :  0-1 mW/8 Ω (matching impedance 8 - 1 k Ω)
Dimensions (W x H x D):  435 x 132 x 335 mm (17-3/16" x 5-1/4" x 13-1/4")
Weight:  7,6 kg (16,6 lbs)

Technics SST-1

 Sound Space Twin Load Horn SST-1
The research into excellent sound reproduction has resulted in the development of a new loudspeaker system configured similar to a musical instrument.
Based on original acoustic theory and using computer simulations the design utilises two different sized horns 3,2 m and 2,6 m '  for low bass reproduction with low distortion as well as high efficiency
"The SST-1 was a sound space twin loaded horn that emerged from the pursuit of high-quality sound. This unique form was structured from flow lines using a unique acoustic method by applying computer simulation technology. Compared with conventional back-loaded horns, the twin loaded horns of the SST-1 smoothed sound pressure frequency response in the midrange and high frequencies, thereby further improving reproduction capability with high efficiency and low distortion, which are characteristics of horn speakers. This also made possible the clear and energetic reproduction of deep bass. In addition, the speaker used a "brilliant throat" construction in which part of the horn was narrowed in order to prevent deterioration in sound quality. This also functioned as an acoustic filter blocking the emission of undesired midrange and high-frequency sound, which have extensive distortion. These synergistic effects dramatically improved the acoustic characteristics, from the high frequencies to bass."
Configuration:  2-way, twin Load Horn
Woofer :  140 mm cone type with chitin diaphragm
Tweeter :  50 mm horn type
Power Handling Music (DIN): 180 W (80 W )
Nominal impedance  :  6 Ω
Frequency Range:  45 Hz - 20,000 Hz (-16 dB)
Sensitivity:  92 dB 1W/1m
Crossover Frequency:  4,500 Hz
Dimensions (W x H x D):  570 x 650 x 190 (without stands)
Weight:  12,0 kg (without stands)
Available in Black, Red or White finish
Supplied with stands

Technics SB-RX 50

For superlative digital and audio visual source reproduction the natural choice is Technics coaxial flat loudspeakers. The development speaker combines the even response characteristics of flat diaphragm speakers with the superior stereo imaging of a linear phase system. Furthermore by  placing the high frequency unit coaxial with the bass unit further benefits in terms of stereo imaging are achieved as the whole speaker system now operates as an ideal point source with the added benefits of flat diaphragms. Disturbances in the frequency response of conventional cone speakers due to the effect of the cavity cannot arise with the coaxial flat diaphragm speaker, leaving the crossover in the ideal situation to combine the two drive units.

Coaxial 2-way Flat Diaphragm Speaker System features:
240 mm flat diaphragm bass unit with coaxial 28 mm flat diaphragm tweeter producing an ideal point source for precise stereo imaging.
Bass unit diaphragm constructed of rigid cross carbon material maintaining pistonic motion to above 4 kHz.
Tweeter diaphragm of mica epoxy resin for higher strength and lowest mass, High efficiency samarium cobalt tweeter magnet system
Balancing magnets reduce external magnetic field for AV use so that alonside a TV monitor the SBRX50 will have no adverse effects on the picture.
High purity LC-OFC wiring
Input power 80 W (160 W music)

Configuration System:  Coaxial 2-way, 2 driver, bass reflex system
Woofer :  240 mm (9-1/2") flat diaphragm type
Tweeter :  28 mm (1-1/8") flat diaphragm type
Power Handling Music (DIN) :  160 W (80 W)
Impedance:  6 Ω Nominal
Sensitivity:  85 dB at 1 W/1 m
Crossover Frequency:  2,200 Hz
Frequency Range:  30 Hz - 48 kHz (-16 dB)
Dimensions  (W x H x D):  300 x 480 x 82 mm (11-13/16" x 16-29/32" x 11-3/32")
Weight:  16,5 kg (36,4 lbs)

KEF K 120

The very first KEF compact speaker, in 1961 was the K1, a three-way baffle available in several formats. Since than, an honourable tradition of music related "C" series names has held sway. In this thirtieth anniversary year, the initial "K" returns to identify three models, each of which embodies the principles, experience, and tradition learned and earned during the past three decades.
Careful attention to both visual and acoustic design means that the "K" Series models are as easy and attractive to integrate into a home environment as they are capable of reproducing today's sometimes complex and demanding recordings in a lifelike and convincing manner.

The new K-Series models featured an attractive ‘louvred’ baffle, a quality 25mm ferro-fluid cooled tweeter, paper coned bass-midrange drive units for high sensitivity and substantial cabinets. They were carefully designed to offer an easy load to the budget amplifiers they were likely to be partnered with.

K120 (1991-93)
In the design of small loudspeakers every parameter becomes more critical. Only a'complete system' approach, as employed by KEF, is likely to bring success. Careful study of drive units, crossover and enclosure, separately and together, with their interactions, is the means to produce a musically integrated sound. KEF system design techniques have , in the K 120, produced a supremely musical small box, designed to produce its specified response when operated on a shelf, or stand mounted close to a wall.

The K 120 is a compact two-way speaker which sounds much larger than it looks. The lightweight 160 mm (6,5") bass/midrange unit provides uncoloured, fast bass response, whilst the 25 mm 91") fluid-cooled tweeter offers accurate, uncompressed high-frequency performance of exceptional clarity. A deeper-than-average cabinet gives an internal volume, and therefore a bass performance that belies its compact frontal aspect. Ideal for a first or second system, an audio-visual installation, or as satellites for a subwoofer, the K 120 is a truly outstanding miniature.

Specification: K 120
System Type:  Two-way, wall/shelf-mount
Enclosure Type:  Closed box
Nominal Impedance:  8 Ω
Amplifier Requirements:  10 - 80 W
Frequency Response:  65 Hz to 20,000 Hz [±3 dB at 2m on reference axis (-6dB at 50Hz)]
Sensitivity:  87 dB at 1m/2.83V (anechoic conditions)
Maximum Output:  107 dB [on programme peaks under typical listening conditions]
System:  SP3132
Drive units: 
Low Frequency:  bass unit B 160 (SP1283),
High Frequency:  25mm tweeter (SP1231)
Crossover:   SP2176
Dimensions (H x W x D):  340 x 205 x 246mm (13,3" x 8,1" x 9,7")
Weight:  5.6kg (12.5 lbs)

Boston Acoustic A60

A small speaker system that produces a clean, undistorted sound image comparable to much larger, more expensive speakers. In addition, the A60 offers the same imaging capability, efficiency, and ease of placement as our more expensive loudspeaker system.

High speaker efficiency means low amplifier cost.
The Boston Acoustic A60 is a highly achieve full volume. An amplifier or receiver rated as low as 10 watts is sufficient (though the speaker can handle as much as 60 watts). This efficiency means you can spend less money on your receiver or amplifier and get excellent performance.

More placement options than other speakers, large or small.
Because the A60 is small and lightweight, it fits easily and unobtrusively into any room. And because it radiates sound in a broader pattern than most loudspeaker systems - like a table lamp instead of a spotlight - it performs well in a veriety of positions, giving you many placement options.

An accurate stereo image increases realism.
Boston Acoustic speakers are well-known for their ability to recreate an accurate stereo image that increases realism and enjoyment. The dimension of the cabinet minimize unwanted sounds that would ordinarily muddy the stereo picture. The result is a crisp, focused image.
Another characteristic that contributes to good imaging is a tweeter that's matched to the woofer in terms of its radiation pattern. A limitation of ordinary tweeters is that they radiate sound forward in a tight pattern, like a flashlight radiates light. In contrast, all woofers radiate over  a broad area, like a table lamp. The tweeter incorporated in the A60 radiates in a very broad pattern, making the woofer and tweeter a well-matched team.

The best combination of range and accuracy in its price class.
It;s not just how high and how low a speaker can go, but how far it can reach into the bass and treble regions while maintaining the correct proportion of high and lows.. The A60 maintains this correct proportion while reaching as high into the treble and as deep into the bass as any speaker in its class.

The A60's woofer uses a specially formulated cone material to eliminate frequency response irregularities at the top end of its operating range. The 1-1/2" tweeter has unusually wide dispersion for a diaphragm its size, due in large part to its elastometric edge termination. Its voice coil is bathed in ferrofluid to improve power handling.

Among the refinements in the A60 are a single-pole (6 dB/oct) network for uniform blending of the drivers in the crossover region and a smooth, easy-to-drive impedance. The grille panel has a 30-degree bevel around its inner perimeter that virtually eliminates early reflections (diffraction) that can blur the stereo image.

High-frequency :  1-1/2" tweeter with ferrofluid cooling
Low-frequency :  8" long throw woofer
Frequency Response:  55 Hz - 22,000 Hz  ±3 dB
Crossover Frequency:  6 dB/octave at 3000 Hz
Impedance: 8 Ω nominal, 6 Ω minimum
Sensitivity (at 1 watt/m input):  90 dB
Recommended Amplifier Power:  10 to 60 watts per channel
Dimensions (H x W x D):  457 x 292 x 197 mm (18" x 11-1/2" x 7-3/4")
Weight:  7,3 kg (16 lbs)
Cabinet Finish:  wood grain vinyl finish over non-resonant particle board

Klipsch Quartet

 Destined to become yet another classic bearing the Klipsch name, the new Klipsch Quartet embodies time-tested design principles and dawing technology to give you a speaker system of the highest sonic integrity.
The Quartet's new hybrid tractrix midrange horn is uncanny in its ability to deliver the countless inner details of complex musical pasages. Designed with computer-modeling techniques, the Quartet woofer is voice-coil-vented to increase power handling and bass output while decreasing distortion.
The classically-styled cabinet of the Quartet is hand-finished in your choice of genuine wood veneers to give you a system as beautiful as the music it reproduces. The Quartet reflects your good taste in music and the art. Of its reproduction.
The Quartet also takes advantage of the Tractrix midrange horn and recreates music with stunning clarity. Features include:
A high frequency horn/driver assembly - provides sparkling detail to your favorite music.
The new Tractrix midrange horn - uncanny in its ability to isolate and deliver  the countless inner details of complex musical passages.
The 12" passive radiator and 10" active woofer - this rear-mounted passive radiator, coupled with a new vented voice-coil woofer, helps create exceptionally clean, tight bass response.
 A - This Klipsch-designed high frequency horn/driver assembly assists the Quartet in providing sparkling detail to your music. The stereo image is so clear and sharply focused, you'll feel as if you can touch the music while it is touching you.
B -  A tractrix hybrid design, the midrange horn of the Quartet delivers exceptionally smooth polar coverage in both horizontal and vertical planes to give you a stereo image now of greater width, depth, and stability. This unique horn is uncanny in its ability to isolare and deliver the countless inner details of the most complex musical passages.
C - The Quartet's powerful, well-extended bass is due in part to this rear-mounted sub-bass radiator. Measuring 12" (305 mm) in diameter, the sub-bass radiator operates on acoustic pressure generated by the woofer for greater bass output and extension.
D - using computer-modeling techniques , Klipsch engineers developed a new voice-coil-vented woofer for exceptionally clean, tight bass, and unparalleled reliability. The new woofer also provides higher output and, with the new sub-bass radiator, lowers distortion.
E - The Quartet's cabinet provides immediate evidence of construction quality. This cabinet is meticulously crafted from your choice of genuine wood veneers. Each pair is matched for color and grain structure of the wood. One tiny flaw and the entire pair is destroyed.
F - Yet another example of efficient design principles at Klipsch, the input panel of the Quartet is built in conjunction with the crossover network of the system. Thus, incoming electrical information is immediately sent to the proper driver without undue and unnecessary wiring.
G - A built-in riser base lifts the Quartet to the proper height for the optimum stereo effect, yet keeps the system coupled to the floor for maximum bass response.
Bandwidth:  38 Hz - 20 ,000 Hz ±3 dB
Sensitivity:  97,5 dB SPL (1watt/1m)
Nominal Impedance:  8 Ω
Power Handling:  100 watts max.continuous
Enclosure Type:  vented box (via sub-bass radiator)
System:  3-way floorstandig type
Drive Components:
High Frequency :  K-76-K tweeter
Mid Frequency:  K-61-K midrange
Low Frequency:  K-10-K 10" (254 mm ) woofer
Sub:  KD-13 12" (305 mm) sub-bass radiator
Dimensions (H x W  x D):  791 c 403 x 311 mm (31-1/8" x 15-7/8" x 12-1/4")
Weight:  23,6 kg (52 lbs)

Rogers LS5/9

The Broadcast Monitor Heritage
We are particularly pround of our long and close association with the B.B.C. under whose Approved Accerditation we manufacture the world renowed LS3/5a and LS5/9 Broadcast Monitors. Rogers is one of only a select handful of Approved Licensees who have proved they can maintain the impeccable manufacturing standards required for their production. It is those very same standards which form the benchmark for our total production and Quality Control Procedures.

The LS5/9 marks 20 years of close association between the design and development departments of the B.B.C. and Rogers. It is compact system designed for studio monitoring purposes, and capable of outstanding resolution and authority in a matching audio system.

At the heart of every conventional loudspeaker ies the voice coil - crucial to its power handling and resistance to overload. At Rogers we design and produce our own very high temperature voice coils as well as all the tooling required to wind and handle them.
Polypropylene has been recognised for some time as an excellent cone material combining rigidity, low mass and self-damping. Againg we make our own tooling and vacuum-form all our cones giving us complete control over virtually every aspect of the bass unit performance.
Surrounds and spiders are specially selected or manufactured to our specific requirements.

The latest generation of metal dome tweeters has allowed us to make significant advances in the high frequency response of our new models. Clean, transparent, detailed sound with extended response is the hallmark of this exciting unit. Power handling, sensitivity and damping are enhanced by the use of ferro-fluid in the magnet gap.

Matching Stand S-59 - The S Series Stands, designed specifically to match the LS3/5a and the LS5/9, are constructed from heavy duty steel tube and sheet to achieve rigidity, low resonance characteristics and high mass. They are fitted with adjustable carpet piercing spikes to give maximum stability.

System Type:  2-way with bass reflex
Driver Unit:
Bass/Mid :  Rogers 200 mm Polypropylene unit to BBC LS2/14 spec
Tweeter:  Son Audax HD13D34H selected and modified to BBC LS2/14 spec by Rogers
Crossover:  Rogers/BBC FL6/36 24 precision elements
Bass Loading:  well damped quasi 3rd order high pass acoustic transfer function at 50 Hz
Frequency Response:  50 Hz - 16 kHz ±3 dB
Distortion (2nd & 3rd harmonic): no
Nominal Impedance:  8 ohms
Sensitivity (2,83 V/1m):  87 dB SPL
Maximum Output (at 2 m per pair):  105 dBA SPL
Recommended Amplifier Power:  15 - 100 watts/channel
Cabinet:  critically damped Birch multiply construction
Connectors:  high quality gold plated  binding posts
Finish: selected Black Ash, Teak or Walnut wood veneer
Grille:  Black woven cloth
Dimensions (H x W x D):  460 x 280 x 275 mm (18 x 11 x 10,8 inch)
Weight:  13 kg (28,6 lb) each
Recommended Placement:  Stands S-59