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





Onkyo TA-2010


Stereo cassette tape Deck
The most affordable way to enjoy high fidelity cassette recording and playback with all-tape compatibility. Featuring Onkyo's own :Accu-Bias" adjust control, long-life superb permalloy Widex rec/pb head, Dolby NR with MPX filter, Dolby referenced VU meters, separate 3-position bias/EQ tape selectors, end-of-tape shut off and pause/edit control.

Specifications:
Track System:  4-track, 2-channel stereo
Recording System:  AC bias
Erasing System:  AC erase
Tape Speed:  4,8 cm/sec
Wow and Flutter:  0,08% (WRMS)
Frequency Response:
Normal Tape :  20 - 14,000 Hz
FeCr Tape :  20 - 16,000 Hz
High Tape :  20 - 16,000 Hz
Signal-to-Noise Ratio:   54 dB (Dolby NR Out, FeCr tape)
A nooise reduction of 10 dB above 5 kHz and 5 dB at 1 kHz is possible with the Dolby NR in.
Input Jacks:
Microphone Jacks :  2
Minimum Input Level/Impedance:  0,3 mV/5 k Ω
Optimum Mic Impedance :  200 Ω - 50 k Ω
Line In Jacks : 22
Minimum Input Level/Impedance :  50 mV/50 k Ω
Outputs
Line : 2
Output Level :  0,480 V ( at 0 VU)
Impedance :  over 50 k Ω
Headphone :  1
Impedance :  8 Ω / 200 Ω
Motor :  DC servo-motor
Heads:  Hard Permalloy Heads
Mechanism Specifications
Tape Speed: 4,8 cm/sec (3 kHz =3%, -2%)
Wow and Flutter:  less than 0,08% (WRMS)
Take-up Torque:  35 - 70 gr-cm
F.F. Torque:  55-130 gr-cm
Rwind Torque:  55-130 gr-cm
Automatic Shut-Off Time:  less than 5 sec
Components:  15 Transistors; 11 Diodes;  2 IC; 3 LED
Power Supply:  AC 120 V 60 Hz ( U.S.A. model) or AC 110/120/220/240 V 50/60 Hz
Power Consumption:  8,5 W
Dimensions (W x H x D):  418 x 150 x 250 mm (16-7/16" x 5-5/16" x 9-13/16")
Weight:  4,8 kg  (10,6 lbs)

Kenwood KR-950B

Kenwood KR-950
Quartz Synthesizer Hi-Speed DC Receiver
Features:
Front panel MM/MC cartridge selection
Two-way tape dubbing LED power meters
Quartz PLL frequency synthesized tuner
Automatic seek tuning with High and Low sensitivity selector
6 FM and 6 AM memory presets

Specifications:
Audio Sections
Power Output:  80 W/ch min. RMS, both channels driven into 8 ohms, 20 Hz to 20 kHz with no more than 0,015% THD
Both Channels Driven ( into 8 Ω at 1 kHz):  85 W + 85 W
Dynamic Power Output (at 4 Ω):  250 W
Total Harmonic Distortion (20 Hz -20 kHz from Aux):
Rated power into 8 Ω :  0,015%
1 watt power into 8 Ω :  0,01%
Intermodulation Distortion (60 Hz :7 kHz = 4:1 SMPTE):
Rated power into 8 Ω :  0,01%
Damping Factor:  40 at 1 kHz, 8 Ω
Transist Response:
Rise Time :  2 µs
Slew Rate :  ±50 V/µs
Input Sensitivity/Impedance:
Phono MM :  2,5 mv/ 50 k Ω
Phono MC :  0,25 mv/100 Ω
Tuner,Aux,Tape Play :  150 mV/50 k Ω
Signal-to-Noise Ratio (A weighted):
Phono MM :  86 dB for 2,5 mV input
Phono MM :  92 dB for 5,0 mV input
Phono MC :  68 dB for 0,25 mV input
Tuner,Aux,Tape Play :  104 dB for 105 mV input
Phono Max. Input Level (at 1 kHz):
MM :  200 mV (RMS), THD0,01%
MC :  30 mV (RMS), THD0,1%
Frequency Response:
Phono RIAA Standard  Curve:  20 Hz to 20 kHz ±0,3 dB
Over All (Aux ->Spkr.):  DC Hz to 160 kHz +0 dB, -3 dB
Tone Control:
Bass :  ±8 dB at 100 Hz
Treble :  ±8 dB at 10 kHz
Filter:
Low :  6 dB/oct at 18 Hz
High :  6 dB/oct at 5 kHz
Loudness Control (Vol -30 dB):  +10 dB at 100 Hz
Output Level/Impedance:
Tape Rec Out (PIN):  150 mV/ 1 k Ω
FM Tuner Section
Usable Sensitivity:  10,8 dBf (1,9 µV)
50 dB Quieting Sensitivity:
Mono :  14,2 dBf (2,8 µV)
Stereo :  36,8 dBf (38 µV)
Signal-to-Noise Ratio at 65 dBf:
Mono :  80 dB
Stereo :  74 dB
Total Harmonic Distortion at 1 kHz:
Mono :  0,07%
Stereo :  0,08%
Frequency Response:  30 Hz to 15 kHz +0,5 dB -2 dB
Image rejection Ratio:  80 dB
Spurious Response ratio:  95 dB
IF Response Ratio:  95 dB
Alternate Channel Selectivity:  60 dB at ±400 kHz
AM Suppression Ratio:  60 dB
Stereo Separation:  50 dB at 1 kHz; 40 dB at 50 Hz to 10 kHz
Antenna Impedance: 
Balanced :  300 Ω
Unbalanced :  75 Ω
FM Frequency Range:  87,5 MHz - 108 MHz
AM Tuner Section
Usable Sensitivity:  10 µV (400 µV/m)
Signal-to-Noise Ratio:  48 dB
Image Rejection Ratio:  40 dB
Selectivity:  25 dB
General:
Power Consumption:  65 W (no signal); 3,5 A (UL and CSA); 450 W (IEC); 450 W (others)
AC Outlet:  Switched2, Unswitched 1
Dimensions (W x H x D):  480 x 142 x 350 mm (18-29/32" x 5-19/32" x 13-25/32")
Weight:  9,0 kg (19,8 lb) net

Kenwood KR-930

Kenwood KR-930
Quartz Synthesizer Hi-Speed Receiver
Features:
Quartz PLL frequency-synthesized tuner
Automatic seek and manual tuning
6 FM + 6 AM memory presets
Two tape monitors and dubbing B to A
LED power meters
60 W/ch min. RMS, both channels driven, 8 ohms, 20 Hz to 20 kHz with no more than 0,03% Total Harmonic Distortion
FM Signal-to-Noise ratio 78 dB mono
FM Total Harmonic Distortion 0,08% mono ( 1 kHz)
Dimensions (W x H x D): 18-29/32" x 5-1/14" x 11-5/8"

Weight:  15,0 lbs

JVC R-S5


FM/AM Stereo Receiver
Features:
27 watts RMS per channel into 8 ohms, or 35 watts RMS per channel into 4 ohms
Total Harmonic Distortion is 0,03%
Low-Noise Phono Equalizer with amazing 90 dB S/N
PLL Multiplex Demodulator in IC for Wide FM Separation
Exceptionally high FM S/N by Newly-Developed IC
JVC's Triple Power Protection

Low-Noise Phono Equaliser with amazing 90 dB S/N.
High-calibre specifications result from the sophisticated circuitry, the OCL (Output-Capacitor-less) type power amplifier, and the use of high grade transistors throughout. The result is a discrete phono equaliser giving a very high 90 dB Signal-to-Noise ratio.

Extra Rugged Power Transistor for More
The power amp of the R-S5 is a sophisticated, fully complementary OCL type, with as many as twelve transistors in each channel. The power transistors themselves are extra rugged to provide true performance over a wide range of output. This means more musical margin.

Full Safety is Assured with JVC's Triple Power Protection
This safeguards your system by providing three important functions:
Power On/Off; shock noise never reaches speakers;
Speakers are electronically disconnected in the event that an abnormal DC voltage appears at the terminals; speaker damage is entirely avoided;
Power transistors are protected in the event of shorts, lower speaker impedance or other power-related mishaps.

Tuner Performance in FM and AM is Clean.
The IF amps and a quadrature detector in the R-S5 are in IC form. Distortion is only 0,15% or less (mono), the Signal-to-Noise ratio is an outstanding 82 dB, and the frequency response is 30 to 15,000 Hz.


Akai AA-6000


Solid State Stereo Pre/Main Amplifier

Special features:
120 W music Power
Uiversal,type Voltage Selector
26 Silicon Transistors
Beautiflly Finished Metalic front panel

Specifications:
Output Power:  120 W at music power
Frequency Response:  20 Hz to 50 kHz (-3)
Input Sensitivity/ Impedance:
Phono :   3mv/ / 50 k Ω
Aux :  150 mV / 100 k Ω
Tape:  200 mV / 200 k Ω
Signal-to-Noise Ratio:
Phono :  better than 65 dB
Tape, Aux :  better than 70 dB
Harmonic Distortion:  less than 0,2% (45 W / 8 Ω, 1 kHz)
Residual Noise:  2 mV (80 dB)
Transistors:  26 silicon transistors
Dimensions (W x H x D):  405 x 160 x 290 (15-7/8 x 6-1/4" x 11-3/8")
Weight:  24,2 lbs (11 kg)

Fisher CR 4029

Recent developments have revolutionized tape technology. And all the technology is the new Fisher CR 4029. some of the new cassette decks offer one or two of these technological innovations - Fisher offers them all in one integrated package.
Two Speed Operation
You can use the CR 4029 at the standard 1-7/8 ips speed and you'll have outstanding recordings, or switch to the new high-speed 3-3/4 ips and get an incredible 30 Hz - 20 kHz ±3 dB frequency response (using normal tape). What's more, recording at high speed drastically reduces wow and flutter and tape dropout. Since a C90 cassette will record a full album at 3-3/4 ips, high speed recording is still economical.

Metal Tape
Another of the mervelous innovations is metal tape. Metal tape demonstrably improves frequency response. Combine it with the new high speed and you'll get a hard-to-believe 30 Hz -25 kHz ±3 dB frequency response with virtual freedom from distortion.

Three VHT/Sendust Heads with Dual process Dolby
All this new technology requires new recording, playback and erase heads. So Fisher engineers came up with our new VHT heads to bring out the best potential of metall tape and high speed. Because the CR 4029 is a three-head design, each head can be optimized for a specific function. There's wide 4 µm gap VHT record hesd for the best possible Signal-to-Noise ratio. A narrow 1 µm gap VHT playback head improves frequency response. And a Sendust alloy erase head overcomes the problem of hard-to-erase metal tape.
The separate record and playback heads allow you to monitor as you record - an absolute must for serious recording. And Dual process Dolby gives you the advantage of Dolby noise reduction in both the record/playback and off-the-tape monitoring mode.

The CR 4029 has all the options.
Why have only part of the new tape technology when you can have all of it? Use metal tape at the standard speed for high performance with long play. Or use normal tape at high speed for both economy and superior performance. Or  chose the ultimate metal tape at high speed.

It's what you'd expect from the New Fisher

We invented High Fidelity over 40 years ago. We've never stopped moving ahead. The CR 4029  is a perfect example. Part of the new Fisher. Where the only thing about us that's old is our tradition of quality and craftsmanship.  

Heathkit AR-1515

From its half-inch tall LED frequency readouts to its extraordinarily low distortion, the Heathkit AR-1515 is the finest receiver heath has ever designed.
The Ar-1515's digital Readout is far more accurate thas dial-type tuning. Simply tune to the exact frequency you want. Signal-strength and center-channel meters then help you "zero in" on the strongest signal and lowestFM distortion. There's even an oscilloscope output to monitor multipath distortion.
The amplifier section meets the same high standards. That extra margin of performance assures clean, wide-range sound without audible strain or struggle on even the most complex musical passages. And you'll hear the music over a background of silence - hum and noise are 65 dB below full output in phono and 80 dB below full output on high-level sources.

The amplifier section is also unmatched in convenience. All the frequently used controls - volume, input selector, stereo/mono switch, tuning - are on the front panel. The secondary controls are concealed behind a hinged door. Convenient indicator lights on the front panel show, the input you've selected. The digit light only when listening to AM or FM and only the necessary tuning meters are illuminated - signal-strength only for AM, signal-strength and center-tune for FM.
The bass and treble controls act primarlly at the frequency extremes to compensate for room acoustic and program deficiencies while maintaining smooth midrange response. And the AR-1515's  preamp out/amp injacks allow it to be used with any audio equalizer, such as the Heathkit AD-1305.

The AR-1515 is even easy to build. Obviously the AR-15151 is a complex and sophisticated receiver, but its well thought out, modular design and color-coded wiring harnesses simplify assembly

Specifications
Amplifier Section
Frequency Response:  8 Hz to 45 kHz (+0 -1 dB);  4 Hz to 80 kHz (+0 -3 dB)
Intermodulation Distortion:  less than 0,08% (from 0,25 to 70 watts, full output)
Damping Factor:  greater than 60
Input Sensitivity:
Phono 1 , 2 :  2 mV
Aux, Tape , Dub. :  200 mV
Input Overload:
Phono :  greater than 100 mV
Aux, Tape,  Dub. :  greater than 10 V
Hum and Noise:
Phono (2 mV reference) :  --65 dB
Aux, Tape, Dub. (200 mV reference):  -80 dB
FM Monophonic
Frequency Response:  20  - 15,000 Hz  ±1 dB  
Antenna:  75 Ω or 300 Ω
Sensitivity:  1,8 µV
Selectivity:  100 dB
Image rejection:  90 dB
Mute Threshold:  0 -5 µV variable
FM Stereophonic
Channel Separation:  40 dB or greater at mid-frequencies;  35 dB at 100 Hz; 20 dB at 10 kHz; 20 dB (Nominal) at 15 kHz
Harmonic Distortion:  0,35% with 100% modulation
19 and 38 kHz Suppression:  60 dB
SCA Suppression:  60 dB
 AM Section
Sensitivity:  5 µV with 50 Ω direct input
Selectivity:  200 dB at 10 kHz
AM Antenna:  external static-shielded loop
Image Rejection:  70 dB at 600 kHz, 50 dB at 1400 kHz
General
Accessory AC Outlets:  One switched and one unswitched
Power Requirement:  120/240 V AC,  50/60 Hz
Dimensions (W x H x D):  21-1/2" x 6-3/16" x 15"
Weight (net):  35,8 lbs

Thorens TD 907


The Thorens  900 Series. The TD 907 - Ultimate Sub-chassis turntable, tradition reinterpreted.


Paying homage to the legendary TD 150 and TD 160 models of the sixties and seventies, THORENS® has reinterpreted the sub-chassis turntable with a state-of-the-art, ground-up development using the latest materials. Highest fidelity and dynamics were our main priorities during the development of the new turntable series. However, we also placed great importance on userfriendliness, a timeless aesthetics as well as flexible confi guration and upgrade options while retaining the traditional sub-chassis design.

FEATURES:
Newly developed, ten-step adjustable pneumatic damping architecture
A conical polypropylene membrane under the platter bearing is decoupled from the triCom base via a visco/propylene layer. The air chamber thus formed under the membrane vents into ten apertures in the base plate which can be opened or closed with a slide.
Three-part platter
The polished aluminium platter features an acrylic insert that acts as a damping pad for the grooved area of the record. 

Tonearm board made of triCom
The tonearm board is also made of triCom and can be cut for almost any 9” and 10” tonearm at the factory.
Tonearm connection options  
Standard: mini 5-pin DIN soldered to RCA/XLR Option: soldered directly to RCA/XLR terminals

SPECIFICATIONS:
Mode of Operation:  Manual 
Drive System:  Precision-machined flat belt (inside)
Motor:  Newly developed, fully electronically controlled and stabilized AC synchronous motor. Plinth-mounted control board. Fine adjustment of speed.
Speeds:  33 1/3, 45 rpm
Speed Change:   Electronic
Platter:  1.5-kg aluminium sub-platter, 1.8-kg aluminium/acrylic outer platter
Damping:  Polypropylene conical membrane between platter bearing and chassis strut, pneumatic, adjustable
Base Plate:  triCom
Tonearm Board:  triCom 
Tonearm:  THORENS® TP 92/10“. Optional: SME M2, SME 309 or other 10” tonearms on request
Anti-skating;  Magnetic 
Power Supply:  External NT 900 electronic unit, 230/115V, 50/60 Hz
Connectors:  2 x RCA unbalanced, 2 x XLR balanced, 1 earth post, 1 mains terminal  
Dimensions (W x D x H):  470 x 380 x 190 mm
Weight:  10 kg
Finishes: White or anthracite structured enamel, Zebrano 

Rotel RX-202



Specifications:
Amplifier Section
Continuous Power Output: 
15 watts per channel, min. RMS all channels driven into  Ω form 50 to 20,000 Hz with no more than 1% Total Harmonic Distortion
17 watts per channel,, min. RMS, all channel driven into 8 Ω at 1 kHz with no more than 1% Total Harmonic Distortion
IM Distortion:  less than 0,5% at rated output
Frequency Response:  20 to 70,000 Hz ±3 dB at 1 watt
Damping Factor:  30 ( 8 Ω, 1 kHz)
Input Sensitivity/ Impedance:
Tape Monitor :  110 mV/40 k Ω
Tape, Aux :  110 mV/40 k Ω
Phono mag. :  2,2 mV/45 k Ω
Phono Cer. :  130 mV/100 k Ω
Phono Overoad:  80 mV (1 kHz)
Phono Equalization:  RIAA S.T.D. ±1,5 dB
Bass Control:  ±10 dB at 100 Hz
Treble Control:  ±10 dB at 10 kHz
Loudness Control:  ±10 dB/100 Hz;  =5 dB/10 kHz
Crosstalk:  50 dB/10 kHz
Hum and Noise:
Phono :  65 dB
Tape :  80 dB
Residual 0,5 mV
Speaker Impedance:  4 to 16 Ω
FM Tuner Ssection
Frequency Range:  88 to 108 MHz
Sensitivity (IHF):  2,9 microvolts
Signal-to-Noise Ratio:  65 dB
Harmonic Distortion:  0,2%
Selectivity:  40 dB ±400 kHz
Capture Ratio:  3 dB
Stereo Separation:  35 dB at 1 kHz
IF Rejection:  70 dB
Image rejection:  55 dB
Spurious Response rejection:  70 dB
SCA Suppression:  60 dB
AM Suppression:  54 dB
AM Tuner Section
Frequency Range:  525 to 1650 kHz
Sensitivity:  20 microvolts
Selectivity:  25 dB ±10 kHz
IF Rejection:  45 dB
Image Rejection:  50 dB
 General Section
Power Consumption:  115 W
Power Supply:  AC 120 V 60 Hz or AC 220 V, 240 V 50/60 Hz
Dimensions (W x H x D):  474 x 114 x 267 mm
Weight:  6 kg (13,2 lbs)

Luxman R-5030


AM/FM Tuner-Amplifier
A new (in 1981) budget tuner amplifier. Computer Analyzed Tuning (CAT) system establishes the optimum receiving condition automatically. Amplifier section employs the Duo-Beta Circuit for improved audio performance.

Features:
Flasher Tuning System Indicator
In case of FM reception, this indicator shows the direction of tuning. When a broadcasting station is coming near, the indicator begins flashing. Turn he tunning knob slowly to the direction shown by the indicator, and the flashing ceases at a point where the precise tuning point is obtained. At this time, the indicator shows the signal strength of the station  just tuned in. When 3 or more indicators light up, stble reception in stereo mode is feasible.

C.A.T. off Switch
Thanks to our innovative C.A.T. (Computer Analized Tuning) circuitry, this tuner-amplifier always provides an optimum reception according to the ambient conditions. Specifically, the anti-birdie and noise canceller circuits are sensing the electric field strength, interference by other stations, etc.

Specifications:
Audio Section
Power Output:  35 W (minimum continuous per channel both channels driven into 8 Ω with no more than 0,03% Total Harmonic Distortion)
Rated I.M.:  no more than 0,03% (8 Ω, 35 W/ch, 60 Hz :7khz = 4:1)
Frequency Response:  10 Hz - 70 kHz (±1 dB)
Input Sensitivity/Impedance: 
Phono ;  2,2 mV/50 k Ω
Monitor :  150 mV/35 k Ω
Phono Overal Voltage:  150 mV
Signal-to-Noise Ratio:
Phono :  77 dB (IHF-A weighted, 5 mV)
Monitor :  102 dB (IHF-A weighted)
Residual Noise:  0,5 mV
Tone Controls:
Bass :  +7 dB  -10 dB at 100 Hz
Treble :  +7 dB -10 dB at 10 kHz
Filters:
Subsonic :  30 Hz (6 dB /oct)
High Cut :  7 kh (6 dB/oct)
Crosstalk:  70 dB ( monitor at 1 kHz)
Loudness Control:  +8 dB at 100 Hz ; +7,5 dB at 10 kHz (loudness control max. VR: -30 dB)
FM Tuner Sectio
Usable Sensitivity:  Mono 10,3 dBf (1,8 µV)
50 dB Quieting Sensitivity:  Mono 14,8 dBf (3,0 µV) (50 µ sec)
S/N Ratio at 65 dBf:  82 dB
Muting Threshold:  3 µV
Frequency Response:  30 Hz - 15 kHz ±1 dB
Distortion at 65 dBf;
MONO
100 Hz :  0,15%
1 kHz :  0,12%
6 kHz :  0,3%
STEREO
100 Hz :  0,2%
1 kHz :  0,2%
6 kHz :  0,3%
Capture Ratio at 65 dBf:  1,5 dB
Image Response Ratio:  55 dB
IF Response Ratio:  90 dB
AM Suppression Ratio:  60 dB
Stereo Separation:  42 dB (100 Hz),  48 dB (1 kHz), 42 dB (10 kHz)
Spurious Response ratio:  80 dB
Alternate Channel Selectivity:  65 dB (±400 kHz)
SCA Rejection Ratio:  60 dB
AM Tuner Section
IHF Usable Sensitivity (1 MHz):  500 µV /m (loop antenna)
Image Response Ratio (at 1 MHz):  45 dB
Signal-to-Noise Ratio:  58 dB
Distortion:  0,5%
General Section
Power Supply: 110, 120, 220 - 240 V 50/60 Hz
Dimensions (W x H x D):  438 x 85 x 384 mm (17,5" x 3,4" x 15,4")
Weight (Net):  7,7 kg (17 lbs)

Trio KD-1033


Without doubt, one of the best value turntables on the market yesterday, supplied complete with cartridge, the KD-1033 offers exceptional performance at a realistic price.
Features:
Belt drive, synchronous motor using a specially developed polyuretane belt.
Wow and flutter less than 0,08%.
Resonsnce free tone-arm, statically counter balanced, stylus pressure adjustable from 0-3 grammes in 0,5 grammes graduations, pulley-weight bias compemsation.
Magnetic cartridge with diamond stylus, frequency response 20 Hz - 20 kHz
Plinth suspension system using three types of spring support with varying tension and pressure values.
Special anti-acoustic feedback feet with built-in rubber springs to absorb external vibration.
Removable acrylic dust cover.

Specifications:
Motor:  4-pole synchronous
Platter:  300 mm die-cast zinc
Speeds:  33-1/3 and 45 rpm
Wow and Flutter:  less than 0,06%
Rumble (DIN weighted):  -64 dB
Tone-arm length:  215 mm
Overhang:  9,5 mm
Tracking Angle Error:  ±1,5°
Tracking Weight Range:  0 - 3 g
Cartridge Weight Range:  4 - 10 g
Power requirements:  240 V AC
Power Consumption:  7 watts
Dimensions (W x H x D):  456 x 145 x 347 mm
Weight:  6 kg

Acoustic Research AR303a


AR 303a
More than fourty years of research and design have led to the production of this extraordinary musical component. The natural evolution of the classic 1967 AR 3aand the critically acclaimed 1994 AR 303, the new AR 303a is the pinnacle of the Acoustic Research loudspeaker line, combining reference quality sonic performance and furniture grade appearance.

The AR 303a Loudspeaker System is finished in a genuine rosewood veneer, accented by a unique gold logo and serial number plate. It features a redesigned creossover network, heavy duty 14 AWG internak wiring and bi-wire/bi-amp capability with improved gold plated 5-way binding posts.

True Acoustic Suspension technology
The AR 303a is based on Tre Acoustic Suspension design, a technology invebted by AR in 1954. a true Acoustic Suspension design uses the air inside of sealed enclosure to precisely control the excursion (back and forth movement) of the woofer cone.
The woofer cone is made of rigid felted paper, and when combined with a high compliance surround it moves like a piston. The long-throw voice coil is designed to undergo large disolscement while maintaining linearity. The compression annd expansion of air in the enclosure provides the linear restoring force to the cone. A True Acoustic Suspension design results in tight, controlled bass, excellent power handling capability and low distortion even at high output levels.


Specifications:
System Type:  3-way Acoustic Suspension
Special features: 
Filtered Soft Dome Technology ;
Vertical Symmetry Array
Frequency Response:  12 Hz - 20 kHz, ±3 dB
Driver Usage: 
For Low Frequency:  12" long-throw woofer
For Mid Frequency:  1-1/2" exposed dome midrange
For High Frequency:  3/4" exposed dome tweeter
Sensitivity:  85 dB (92,83V/M)
Impedance (nom/min): 6 Ω / 4 Ω
Power Rating: 
Minimum :  50 W/ch
Maximum :  250 W/ch
Crossover: 
650 Hz ( 12 dB/oct low and high pass)
5500 Hz (6 dB/oct - low pass; 18 dB/oct - high pass)
Dimensions (W x H x D):  14,75 x 25 x 11,19 inch
Weight:  54 lbs
Finish:  Rosewood Vener

Arcam Two Plus

 Arcam Two - Audio Monitor Loudspeakers
The Arcam series of loudspeakers from A&R Cambridge are well engineered moving coil loudspeakers which provide excellent sound quality at affordable prices. They qre the result of several years of intensive research by A&R's designers into ways of achieving outstanding musical fidelity from compact sensibly priced speaker system
Design and Construction
All three loudspeakers are classic UK two way designs, using selected tweeters and A&R designed plastic coned bass drivers. These are otimally matched to rear ported (reflex) loaded cabinets, solidly constructed from high density 18 mm board with ultra rigid 19 mm "Medite" front baffles. The larger cabinets are heavily cross braced and damped,, to minimise cabinet resonances.
The Arcam Two+ are finished in quality real wood veneers (with black as a no-cost option) the compact.  All models have attractive removable black reticulated foam grilles of high acoustic transparency.

Each speaker uses an eight element close tolerance crossover network which has been designed handle high power levels without saturation or overheating. The crossovers make use of audiophile quality components wherever appropriate, including very generously sized,, low loss inductors,, plastic film capacitors and metal oxide resistors. The printed circuit (pcb) layout of each crossover network closely approximates to that of the classic "hard wired" design.

In the case of the Arcam Two+ models,, the pcb has also been designed to permit bi-wiring, with the treble and bass section brought out to separate pairs of terminals on the speakers back  panels.
Specifications
Arcam Two+
System Design:  2-way reflex loudspeaker
Cabinet:  braced and optimally damped, constructed from 18 mm board with 19 mm Medite front baffle
Internal Volume:  14 liters
Drive Units:
One 180 mm cobex coned bass/midrange
One 20 mm soft dome tweeter
Crossover:  8 element, crossover frequency 3,0 kHz, 12 dB/octave
Connections:  Bi-wirable, 4 mm socket on back panel
Frequency Range:  42 Hz - 20 kHz
Impedance Modulus:  8 Ω nominal ( 6,5 Ω minimum)
Sensitivity:  88 dB/watt nominal, measured at 1 metre
Amplifier Compatibility:  15 - 70 W under normal operating conditions
Finish:  Walnut veneer or black  with black reticulated foam grille.
Dimensions (W x H x D):  223 x 378 x 280 mm (8,8 " x 14,9" x 11,0")
Weight:  8,2 kg (18") each

Arcam Three plus


Arcam Three - Ultra compact audio monitor loudspeakers

The Arcam series of loudspeakers from A&R Cambridge are well engineered moving coil loudspeakers which provide excellent sound quality at affordable prices. They qre the result of several years of intensive research by A&R's designers into ways of achieving outstanding musical fidelity from compact sensibly priced speaker system

All three loudspeakers are classic UK two way designs, using selected tweeters and A&R designed plastic coned bass drivers. These are otimally matched to rear ported (reflex) loaded cabinets, solidly constructed from high density 18 mm board with ultra rigid 19 mm "Medite" front baffles. The larger cabinets are heavily cross braced and damped,, to minimise cabinet resonances.
The Arcam Three+ is offered with a well finished walnut or black ash type vinyl wrap. All models have attractive removable black reticulated foam grilles of high acoustic transparency.

Specifications
Arcam Three+
System Design:  2-way reflex loudspeaker
Cabinet:  solidly constructed from 18 mm board with 19 mm Medite front baffle
Internal Volume:  8 liters
Drive Units:
One 135 mm polypropylene coned bass/midrange
One 14 mm dome/cone tweeter
Crossover:  8 element, crossover frequency 3,5 kHz, 12 dB/octave
Frequency Range:  47 Hz - 20 kHz
Impedance Modulus:  8 Ω nominal ( 5 Ω minimum)
Sensitivity:  88 dB/watt nominal, measured at 1 metre
Amplifier Compatibility:  15 - 50 W under nrmal operating conditions
Connections:  4 mm socket on back panel
Finish:  Walnut or black ash vinyl with black reticulated foam grille.
Dimensions (W x H x D):  181 x 341 x 236 mm (7,1 " x 13,4" x 9,3")
Weight:  4,8 kg (10,6") each

Musical Fidelity A2 CD

 Musical Fidelity A2CD
Features:
Selectedmechanism and printed circuit boards
Sophisticated low jitter reclocking circuit
High quality Class A low impedance output stage
Remote control
Bitstream converter system
Standard 440 mm width
Random play function
Edit function
32track programming
Optical and coaxial digital outputs

Benefits:
Top level sonic performance and consistency
Greatly improved sound quality, imaging and tonality
High quality consistent sound with great presence and authority
Convenient operation from the listening position
Increased sound quality with smoother response and lower distortion
Matches the majority of alternative components
Plays back all tracks on the disc in arandom order
Allows easy taping of different tracks to best fit tape length
You can listen to the tracks you want in the order you prefer
Enables connection of external
Digital-to-Analogue converters or digital amplifiers
Specifications:
Frequency Response:  20 Hz - 20 kHz ±1dB
Signal-to-Noise Ratio:  better than -105 dB
Dynamic Range:  better than 95 dB (1 kHz)
Harmonic Distortion:  0,009% (1 kHz)
Wow and Flutter:  not measurable (Quartz accuracy)
Channel Separation:  better than 92 dB (1 kHz)
Output Analog:  2,0 V RMS
Output Digital:  0,5 Vp-p / 75 Ω  (coaxial)
D/A Converter:  8-times oversampling
Analog Filter:  4 pole CHV filter
Pick-up Type:  2D parallel objective lens drive, 3 beam laser pick-up
Laser Type:  GaAlAs semiconductor laser
Wavelength:  760-805 nm
Power Consumption:  10 watts
Dimensions (W x H x D):  440 x 95 x 340 mm
Weight:  5,1 kg
Standard Accessories:  Remote control handset