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

Wharfedale W70D

 Achromatic W70D Versatile High and Low Boy Deluxe Four-Way Speaker System.
Exclusive Sand-Filled Enclosure
The new W70D incorporates the finest components for multiple speaker systems. The 12 ½" woofer employs a massive (9 ½ lb) magnet assembly on a heavy cast aluminum chassis. The 2" pole piece and magnet keeper plates of finest grain-oriented, high permeability Sheffield steel, insure maximum gap flux density with minimum heat loss, as well as exceptional power and transient handling ability. Low natural resonance, high but well controlled compliance, and long axial excursion add to the thrilling bass response capabilities of this acoustic suspension system.
 A special, heavy duty 8" speaker serves as a "passive" radiator for the upper bass range and as an energized driver for the lower midrange. An acoustically isolated 5" unit handles the upper midrange, wwhile Wharefedale's advance-design mylar pressure-dome tweeter contributes pure, wide-angle treble. Individual, continuously variable controls adjust the mid and treble ranges.
  The enclosure employs Wharfedale's exclusive sand-filled construction for maximum inhibition of cabinet sound coloration. The versatile design permits use of the W70D as a "high boy" when placed on end, or as a "low boy" when placed on its side. Superbly styled, the W70D is often used, because of its table top, as an end table alongside sofas or chairs. Because of its low height, it is also ideal for positioning under bay windows. The front grille is removable for decorative changes.

Frequency Response:  25 - 20,000 Hz
Input Power Minimum:  8 watts (IHF, per channel)
Input Power Max:  40 watts (IHF, per channel)
System Impedance:  4 to 8 ohms
Acoustic Controls:
Treble : Continuously variable
Midrange :  Continuously variable
Speaker Components:
1 x 12 ½" heavy duty woofer
1 x 8" upper bass/lower midrange
1 x 5" upper midrange
1 x 3" omnidirectional mylar dome tweeter
Acoustic suspension cabinet with exclusive sand-filled construction LCR 4-section crossover network
Crossover Points:
Low Midrange :  175 Hz (mechanical)
Upper Midrange :  1250 Hz (electrical)
Treble :  3500 Hz (electrical)
Dimensions (W x H x D):  24" x 20-7/8" x 12-3/8" (Utility Model, no table tops)
Weight:  74 lbs (shipping)

Finishes:  Choice of oiled walnut (std.), polished walnut (on special order), or "Utility" in sanded Birch with flat molding.

EPI 100

 The Linear Sound of EPI
At first glance, it may seem like a contradiction in terms. How do you correlate a sound, something you perceive with your ears, with a line, something you perceive with your eyes.
The answer is surprisingly simple.
Linear Sound is the way a perfectly reproduced audio signal would look when plotted across a frequency response graph; a perfectly straight line, with no dips or peaks in the middle, and no unexpected drop-offs at the frequency extremes.
Linear Sound is accurate sound. And while no loudspeaker to date is perfect, the more linear it looks on a frequency response graph the more accurate it will sound your ears.
Thanks to many years of research and development by some very knowledgeable people, EPI loudspeakers are the most linear you'll hear.
Few loudspeakers have even relatively linear response that extends as low into the bass region, or as high into the treble as EPI loudspeakers.
And EPI loudspeakers dispers all those frequencies over a broader area of the typical listening room than any other conventional loudspeakers (at 15,000 Hz, EPI loudspeakers are still virtually linear 90 degrees of axis). Which means that unlike other loudspeakers , EPI speakers are entirely free of the "boxiness" that makes a loudspekers sound like a loudspeaker … instead of like music.
 "The Linear Sound of EPI" expresses our continuing dedication to creating perfectly accurate loudspeakers.

The EPI 100 has become the industry standard for bookshelf loudspeakers. Leading consumer and audiophile publications have consistently given the EPI 100 their top ratings. It does everything yoy want a loudspeaker to do, and it does it al. In a compact cabinet.
The EPI 100 features all the technological advances made by EPI.
You will hear "extended frequency response", which is the ability of a speaker to reproduce both the very lowest, and very highest, musical frequencies.
You will hear "extreme linearity", common to all EPI speakers. Music doesn't come out of the EPI 100 sounding like it's coming out of a box. There is virtually no exaggeration, or coloration of the signal fed into the speakers.
You will hear excellent "dispersion", over 1180 degrees, made possible by EPI's unique one-inch linear air-spring tweeter. No matter where you sit in your room to listen to the EPI 100, you will enjoy a sharply-defined stereo effect.
And, unlike nearly every other speaker, you can listen for hours to the EPI 100 without suffering listening fatigue. The reason is EPI's "minimum distortion" - both harmonic and intermodulation.
Remarkably, the EPI 100 gives you so much, without costing so much.
Frequency Response:  48 to 20,000 Hz ±3 dB
Recommended RMS Power Range:  12 to 80 Watts
Crossover Frequency:  1800 Hz
Driver Complement
1 x 1" Air Spring Tweeter
1 x 8" Long Traverse Woofer
Nominal Impedance:  8 Ω nominal; 4 Ω D.C.
Finish:  oiled walnut,wood-grained vinyl optional
Grille:  acoustically-transparent black cloth
Dimensions:  21" x 11" x 9"
Weight:  25 lbs

Akai AA920

 AA-920 Stereo Tuner Amplifier
The AA_920 top quality FM/AM MPX stereo tuner amplifier features multiple connections and controls and three separate speaker systems which can be utilized individually or two systems simultaneously. Step type volume control with prest facility, bass and treble controls for even and precise adjustment. Efficient design includes signal strength tuning meter, mode indicator lamps and ideally positioned controls for easy operation.

FM Tuning Range:  86,8 to 109,2 MHz
Dial Tracking Error:  ±250 khz
Sensitivity (IHF):  3,2 µV
Sensitivity Deviation:  withinh 3 dB
Image Rejection Ratio:  better than 75 dB
IF Rejection Ratio:  better than 85 dB
Capture Ratio (IHF):  less than 2,5 dB
Liliting Sensitivity:  less than 8 dB
Muting Sensitivity:  23 dB ±3
Selectivity:  better than 70 dB
AM Suppression Ratio:  better than 45 dB
Signal-to-Noise Ratio:  70 dB
Distortion Factor [stereo/mono]:  less than 1,5% / 0,7%
Frequency Response:  -11 dB at 10 kHz (±1 dB)
Stereo Sensitivity:  less than 14 µV
Stereo Separation:  better than 33 dB
Rejection Ratio:  better than 50 dB
L-R Deviation:  within 3 dB
Recording Output:
Pin :  350 mV (-7±3 dB)
DIN :  70 mV (-21 ±3 dB)
AM Tuner Section
Frequency Range:  525 to 1650 kHz
Dial Tracking Error:  within 2%
Sensitivity (IHF):  250 µV
Sensitivity Deviation:  within 6 dB
Image Rejection Ratio:  better than 55 dB at 1 MHz
IF Rejection Ratio:  better than 55 dB at 1 MHz
Selectivity:  better than 30 dB ±10 kHz
S/N Ratio:  better than 40 dB
Distortion Factor:  less than 1,5%
Frequency Response:  -15 dB at 3 kHz
Recording Output:
Pin :  140 mV (-15 ±2 dB)
DIN :  27 mV (-29 ±2 dB)
Audio Section
Power Output:  
45 W per channel at 4 Ω
30 W per channel into 8
Frequency Response:
Phono :  RIAA standard  ±1,5 dB
Aux :  20 Hz to 50,000 Hz
Power Bandwidth:  10 to 50,000 Hz (distortion 0,5%)
Input Sensitivity
Phono :  2,5 mV (-50 ±1,5 dB)
Mic :  2,5 mV (-50 ±1,5 dB)
Aux :  140 mV (-15 ±1,5 dB)
Tape :  140 mV (-15 ±1,5 dB)
Signal-to Noise Ratio:
Phono :  better than -35 dB
Mic :  better than -35 dB
Aux :  better than -45 dB
Tape :  better than -45 dB
Residual Noise:  less than 1,4 mV (less than -55 dBm)
Tone Control
Bass :  ±10 at 100 Hz ±10 dB
Treble :  ±10 at 10 kHz ±10 dB
Loudness Control:  9 dB  at 100 Hz ±1,5 dB; 6 dB  at 10 kHz ±1,5 dB
Low Cut Filter :  -8 dB  at 50 Hz ±1,5 dB
High Cut Filter :  -9 dB at 10 kHz ±1,5 dB
Crosstalk:  better than 50 dB
L-R Deviation:  within 2,5 dB Phono
Recording Output
Pin :  140 mV (-15 ±2 dB)
DIN :  25 mV (-30 ±2 dB)
Semiconductors:  38 Transistors; 3 FET; 5 ICs; 20 Diodes; 1 Zener Diodes; 2 Varistors
Power Source:  100 to 240 V , 50/60 Hz
Power Consumption:  Max 180 W
Dimensions (W x H x D):  454 x 155 x 330 mm (17,9" x 6,1" x 13")
Weight:  15 kg  (33 lbs)

Akai AA930

The Stereo Tuner Amplifier AA-930 , like all of the AA-900 Series, features uncluttered front panel control design for efficient operation. Powerful 200 W solid state tuner amplifier employing top quality parts and space-age circuitry for quality stereo performance.

Sophisticate your old system with Akai's new AA-930 stereo receiver.  Delivers all the power and performance your system could ever need. Separate signal and tuning indicators are provided, plus sound monitoring, high/low filters and FM muting. The AA-930 comes in a distinctive rosewood cabinet, … a unit that looks as good as it sounds.
FM Tuning Range:  86 to 108 MHz
Dial Tracking Error:  ±250 khz
Sensitivity (IHF):  2,8 µV
Sensitivity Deviation:  withinh 3 dB
Image Rejection Ratio:  better than 85 dB
IF Rejection Ratio:  better than 100 dB
Capture Ratio (IHF):  less than 1,5 dB
Liliting Sensitivity:  less than 8 dB
Muting Sensitivity:  20 dB ±3
Selectivity:  better than 80 dB
AM Suppression Ratio:  better than 45 dB
Signal-to-Noise Ratio:  70 dB
Distortion Factor [stereo/mono]:  less than 1,5% / 0,5%
Frequency Response:  -11 dB at 10 kHz (±1 dB)
Stereo Sensitivity:  less than 20 µV (less than 26 dB)
Stereo Separation:  better than 35 dB
Rejection Ratio:  better than 50 dB
L-R Deviation:  within 3 dB
Recording Output:
Pin :  390 mV (-6±3 dB)
DIN :  70 mV (-21 ±3 dB)
AM Tuner Section
Frequency Range:  525 to 1650 kHz
Dial Tracking Error:  within 2%
Sensitivity (IHF):  250 µV
Sensitivity Deviation:  within 6 dB
Image Rejection Ratio:  better than 60 dB at 1 MHz
IF Rejection Ratio:  better than 60 dB at 1 MHz
Selectivity:  better than 30 dB ±10 kHz
S/N Ratio:  better than 40 dB
Distortion Factor:  less than 1,5%
Frequency Response:  -15 dB at 3 kHz
Recording Output:
Pin :  140 mV (-15 ±2 dB)
DIN :  27 mV (-29 ±2 dB)
Audio Section
Power Output:  
50 W per channel at 4 Ω
45 W per channel into 8
Frequency Response:
Phono :  RIAA standard  ±1,5 dB
Aux :  20 Hz to 50,000 Hz
Power Bandwidth:  10 to 50,000 Hz (distortion 0,5%)
Input Sensitivity
Phono :  2,2 mV (-51 ±1,5 dB)
Mic :  1,5 mV (-54 ±1,5 dB)
Aux :  110 mV (-17 ±1,5 dB)
Tape :  110 mV (-17 ±1,5 dB)
Signal-to Noise Ratio:
Phono :  better than -33 dB
Mic :  better than -33 dB
Aux :  better than -43 dB
Tape :  better than -43 dB
Residual Noise:  less than 2,5 mV (less than -50 dBm)
Tone Control
Bass :  ±10 at 100 Hz ±10 dB
Treble :  ±10 at 10 kHz ±10 dB
Loudness Control:  7 at 100 Hz ±1,5 dB; 6 at 10 kHz ±1,5 dB
Low Cut Filter :  -9 at 50 Hz ±1,5 dB
High Cut Filter :  -9 at 10 kHz ±1,5 dB
Audio Mute:  -20 at 1 kHz ±1,5 dB
Crosstalk:  better than 50 dB
L-R Deviation:  within 2 dB Phono
Recording Output
Pin :  125 mV (-16 ±2 dB)
DIN :  23 mV (-30 ±2 dB)
Semiconductors:  53 Transistors; 1 FET; 5 ICs; 30 Diodes; 5 Zener Diodes; 2 Varistors
Power Source:  100 to 240 V , 50/60 Hz
Power Consumption:  Max 260 W/320 VA (4 Ω)
Dimensions (W x H x D):  483 x 168 x 398 mm (19" x 6,6" x 15,7")
Weight:  15 kg  (33 lbs)

Kenwood KP-3021

 Kenwood's KP-3021 is a revolutionary automatic turntable. Thanks to the 24-pole synchronous motor employed exclusively for the arm's operation, all the automatic functions - auto-play, auto-return, auto-repeat and auto-stop - are electrically operated. This means KP-3021 has completely overcome the troubles conventional automatic players often suffer from. Even when you happen to mistake the handling, KP-3021's fool-proof mechanism won't be out of oreder.
 Special Features
Automatic Mechanism
A high quality 24-pole synchronous motor is emplyed exclusively for the arm operation. This means all the automatic operations are done electrically. Besides the convenience, Kenwood has brought reliability, smoothness and durability to the KP-3021. you seldom meet the accidents or troubles in the automatic mechanism. Even when you mis-handle, neither mechanism nor disc is injured. What is required to you is to switch on and  to fully rely on the KP-3021.

Automatic Operations
Auto-play - Push soft the control panel and the turntable rotates. At the same time the arm leaves the rest and gently goes down on a disc.
Auto-return - When the disc playing ends, the arm returns to the rest and the power switch turns off. No harmful side-force affects on the stylus.
Auto-repeat - By the slide-type switch the disc playing can be repeated.
Auto-cut - When you want to discontinue the playing, push the control panel. The arm rises and returns to the rest.

Disc Size Selector
According to the disc on the turntable please set the lever beforehand at either of 30, 25 0r 17. the stylus then sinks accurately on the starting point.

Manual Operation
By setting the lever at the position "Manual", the KP-3021 can be operated manually. For manual convenience the Arm Lifter is attached. Another enjoyment may be yours through hand-operation.

Belt-Drive System
For the drive system Kenwood employs a specially developed 4-pole outer-rotor hysteresis synchronous motor which provides constant rotation with far less wow and flutter. In addition, the belt drive system offers superb signal to noise ratio.

Newly Designed Pipe Arm
The S-shaped pipe arm with high sensitivity is used. The built-in lateral balancer will meet any severe equirement.
Drive:  Belt drive system
Motor:  Outer-rotor hysteresis synchronous
Turntable:  12" (300 mm) solid die-cast aluminum alloy type
Speeds:  33- and 45 rpm
Wow and Flutter:  less than 0,08%
Signal-to-Noise Ratio:  more than 45 dB
Tone Arm:  Static Balanced Pipe Arm; 4-terminal plug-in type; Lateral balancer
Tracking Error:  ±1,5 degree
Stylus Pressure Variable Range:  0 to 4 grams
Cartridge:  Moving Magnet Type
Frequency Response:  20 to 20,000 Hz
Output Balance:  within ±1 dB
Channel Separation:  more than 25 dB at 1,000 Hz
Impedance:  5 k Ω
Output Voltage:  5 mV (1, 000 Hz, 5 cm/s)
Load Impedance:  50 k Ω
Recommended Stylus:  3 grams ±0,5
Stylus :  0,7 mil Diamond Stylus
Compliance :  7 x 10¯⁶ cm/dyne
Replacement Stylus:  ype N-34
Special Mechanism:  Auto-in; Auto-cut; Auto-return; Auto-repeate; Disc size selector; Manual-in systems; 24-pole synchronous gear motor for arm drive.
Supplied Accessories:  Spare plug-in head, adaptor, motor oil
Power requirement:  AC 110-120 V; 220-240 V
Power Consumption:  14 W at 60 Hz; 15,5 W at 50 Hz
Dimensions (W x H x D):  18-1/8" x 7" x 16-1/8"
Weight:  16,9 lbs

Dual CS 505-1

 Dual CS 505-1
U.L.M. Tonearm, Vario-belt drive Semi-automatic.
 U.L.M. Tonearm and Gimbal Suspension.
The four-point gyroscopic gimbal, with mass-free vertical tracking force, is featured in the CS 505-1 as well as in the higher prieced Dual turntables. Thus, the CS 505-1 has the same gyroscopic bearing principle as the navigation instruments used in areonautical engineering. The advantages absolutely minimum bearing friction, no change in tracking forces and uniformly excellent tracking properties under all operating conditions. Even in the case of warped records or when the turntable is not quiter precisely horizontal. This is the highest precision bearing technology typical of Dual quality.
 The U.L.M. Tonearm. Less than half the effective mass of convencional high-quality tonearms. Clearly lower harmonic distortion and audibly better tracking even with warped records.
The special XM 300 alloy. High strength and outstanding internal damping. No flexural resonance from 60 to 80 Hz, no torsional resonance from 300 to 400 Hz. Better stereo separation.
The tonearm suspension. Four-point gimbal. Only 0,07mN bearing friction and mass-independent tracking force. Perfect balance in all planes of motion.
U.L.M. Cartridge. Ortofoon TKS 52 E with elliptical stylus. (Optional and extra).
Dual belt drive. High reliability and long maintanance-free operation thanks to automatic speed pre-selection and the flat belt precision ground to 2/100 mm.
Pitch control. Fine speed control by means of the vario-pulley with a 6% control range.
Full size platter with damping soft rim mat.
 Two-scale anti-skating control with long precision spring. Specially calibrated to the low friction bearing of the U.L.M. Tonearms.
Pilot lift. A unique safety feature that automatically engages the cue control when the tonearm is lifted from its rest post and moved toward the record. The tonearm then remains suspended over the record until released by the cue control to begin play.
Automatic stop. This raises the tonearm at the end of a record and switches off the motor.
Automatic cover tild-hold with continuously variable tension.
Type: Semi-automatic Hi-Fi turntable
Motor: 16-pole synchronous
Drive System: Belt-drive
Speed: 33-1/3 and 45 rpm
Pitch Control: 6%
Wow and Flutter: 0,08 (DIN) / 0,05 (WRMS)
Rumble Unweighted S/N Ratio: 47 dB
Rumble Weighted S/N Ratio: 69 dB
Diameter : 304 mm
Weight : 0,9 kg
Tonearm Effective Mass: 5,6 g
Vertical Bearing Friction: 0,07 mN
Suitable for 1/2 Cartridge Systems: 4,5 – 10
Recommended Cartridge: TKS 52 E
Nominal Tracking Force: 15 mN
Effective Stylus Mass: 0,4 mg
Frequency Response: 10 – 25,000 Hz
Transfer Ratio: 3,5 mV/5 cms per channel at 1 Hz
Crosstalk Attenuation (at 1 kHz): 24 dB
Static Compliance:
Horizontal / Vertical: 25/20 µm/mN
Intermodulation Distortion: 0,9 %
Bass Trackability: 70 µm (300 Hz)
Treble Trackability: 0,6 % (10 kHz)
Power Requirement: 110/220/240 V AC 50/60 Hz
Dimensions (W x H x D):  440 x 134 x 368 mm ( 17-1/2” x 5-1/8” x 14-1/2”)
Finish: Satin-metalic

Cover: CH15

Philips FA-960

Power Output (acc.to FTC): 
100 W Continuous sine wave  at 8 Ω load (20-20,000 Hz, THD less than 0,03%)
125 W Continuous sine wave at 4 Ω load (20-20,000 Hz, THD less than 0,05%)
Power Output (acc.to IEC)
115 W Continuous  sine wave at 8 Ω load (63-12,500 Hz, THD less than 0,03%)
Power Output at 1 kHz, THD less than 0,7% (acc.to DIN):
At 8 Ω load :  115 W
At 4 Ω load :  180 W
At 2 Ω load :  250 W
IHF Music Power:
At 8 Ω load :  120 W
At 4 Ω load :  225 W
At 2 Ω load :  280 W
Total Harmonic Distortion:  0,008% (1 kHz)
Intermodulation Distortion:  0,03%
Power Bandwidth:  10 - 30,000 Hz (-3 dB)
Frequency Response:  40 - 20,000 Hz ±0,5 dB
Signal-to-Noise Ratio:  106 dB (weighted)
Channel Separation:  75 dB 91 kHz)
Damping Factor (at 8 Ω):  180 x
Input Sensitivity:
Phono MC :  0,25 mV/100 Ω
Phono MM :  2,5 mV/47 k Ω
Compact Disc :  150 mV/25 k Ω
Tuner :  150 mV/25 k Ω
Tape 1, 2 :  150 mV/25 k Ω
Aux 1, TV 1 :  150 mV/25 k Ω
Aux 2, Video 1 :  150 mV/25 k Ω
Tape:  150 mV/220 Ω
Loudspeakers:  2 x 4 - 8 Ω
Headphones:  8 - 1000 Ω
Tone Control:
Bass :  ± 10 dB at 100 Hz
Treble :  ±10 dB at 10 kHz
Balance Control :  0 - 50 dB
Power Requirements:  220 V 50/60 Hz
Power Consumption:  360 W
Dimensions (W x H x D):  420 x 158 x 334 mm

Weight:  14 kg

Sharp DX-500

 Sharp DX-500H
Advanced Compact Disc Digital Audio Player:
3-way Search System,
Programmable Operation,
LED Display for Disc Information.

A Breathtaking Advance In Digital Audio Entertainment
A masterpiece of advanced digital audio design, the Sharp DX-500H Cd Audio player. Remarkable music precision and stunning operational sophistication are combined in one streamlined unit. A DC servo amplifier is used for the analogue part of the audio system and an aluminium die cast chassis is used for the mechanism to ensure high quality sound and stable playback. In addition to the improvements in audio quality and operational ease. Sharp has succeeded in bringing you the ultimate music playback freedom – a comprehensive array of programming and search capabilities. The DX-500H, the second digital marvel from Sharp, leads the new age of audio.
 Boasting a range of innovative audio features, the DX-500H delivers pure noise-free music never achieved with ordinary analogue players.
Error-correction system: The system compensates for dropout signals caused by disc defect or scratches, replacing digital signals to ensure optimum playback performance.
DC servo amplifier: Digital sound quality depends on analogue system of the player. The DC servo amplifier in the analogue system ensures flat frequency response, improved S/N ratio and remarkable low distortion.
Aluminium die cast chassis: Strong die-cast horizontal chassis eliminates mechanical vibration to maintain high sound quality.
Focusing servo system: The system balances disc-lens distance, to keep laser beam focused precisely on the disc surface.
Tracking servo system: Sharp's laser system is designed along innovative lines to give extra-precise tracking performance. Minutely-designed servo circuits ensure constant, accurate positioning of the laser while aluminium die-cast frame reduces mechanical vibration for optimum disc reading.
3-way serach system and programmable operations
Create your own music format: AMPS (Automatic Programmable Music Selector) lets you randomly select 15 of your choices from the disc’s 20 selections and program them in any order you like. Locate the music you want quickly and easily with APLD (Auto Program Locate Device) while APSS (Auto Program Search System) skips forward to locate the beginning of the current selection. You can enjoy immediate repeat play of an individual song or the entire disc with convenient repeat function.
Combined with APMS, this function allows you to listen to an entire programmed selection of music over again.
 The combination of Sharp's DX-500H CD player and PCM Technology enables live performance digital-age music never before achieved with ordinary analogue equipment. Dynamic range of 97 dB, wow and flutter too low to be measured, channel separation of 97 dB. It's all yours with the Sharp DX-500H.

The pick-up of the player requires pinpoint precision to read each tiny signal accurately. The DX-500H equipped with advanced, high-performance semiconductor laser diode technology features a state-fo-the-art laser pick-up system.

Time counter with 4-digit LED display: Times disc playback and gives you constantly changing disc playback time information with an easy-to-read 4-digit LED display. Synchronized with fast forward and rewind operations, the counter enables you to lackate any part of the disc swiftly and accurately.

20 LED indicators: Accurate disc information including the number of selections, programmed pieces and selection currently playing is available from these indicators.

Drawer-type front-loading disc table: With a touch of a button on the front panel, the disc table slides out. Just place the disc on the disc table and press the same button again and it slides in for playback. Operation is simple and accurate.

Headphone socket: For sophisticated private listening. With headphones connected the DX-500H provides the excitement of digital audio without disturbing anyone else.
Audio Section
Number of Channels:  2-channels Stereo
Frequency Response:  5 - 20,000 Hz ±0,5 dB
Dynamic Range:  97 dB
Total Harmonic Distortion:  0,003% (at 1 kHz)
Wow and Flutter:  below measurable levels
Level Fluctuation:  below measurable levels 
Crosstalk:  97 dB (at 1 kHz)
Error Correction:  CIRC (Cross Interleave Reed-Solomon Code)
Line Out :  2,2V/10 k Ω
Headphones :  48 mW/8 Ω
Disc Section:
System Format:  Compact disc system
Outer Diameter:  120 mm
Inner Diameter:  15 mm
Track Pitch:  1,6 µm
Playing Time:  approx. 60 minutes
Sampling Frequency:  44,1 kHz
Quantization:  16-bit linear
Modulation:  EFM
Power Source:  Ac 110/220/240 V, 50/60 Hz
Power Consumption:  40 W
Dimensions (W x H x D):  330 x 104 x 345 mm
Weight:  8,5 kg

Akai 1722W

 Akai 1722W Stereo Tape Recorder
Handy Compact Stereo Tape Recorder
The 1722W is a robustly constructed complete stereo tape recorder unit with built-in phono amp and large 5 x 7” speakers. Automatic Shut-Off. Instantly convertible to a full bodied Public Address System.

Self-Lubricating 2-Speed Induction Motor for Trouble-Free Operation
For watches and car engines, oil circulating self-lubricating motors are more practical … and for tape recorder motors as well.
Two oil circulating cellulose fiber mechanisms are installed in this high performing induction motor for long lasting trouble-free operation. Oil circulating speed is adjusted naturally according to motor revolutions and temperature. Thus, shaft rotation is always smooth and stable and various mechanical trouble resulting from oil circulation suspension does not occur. Further, these unique cellulose fibres act as filters to keep the oil clean during the circulating process for epoch making endurance.

Tape Selector Switch for Better Frequency Response
This model is equipped with a Tape Selector Switch facilitating the use of high performance wide range tape. Setting this switch according to the tape being used adjust the equalization for better frequency response characteristics.
 Speaker Switch Facilitates Monitoring During Recording or Playback
New 3-Way Speaker Switch (Mute/Recording Monitor, Normal, PA) provides proper signal output for private headphone listening or monitoring during recording, speaker output, or Public Adress System.

Quality Parts and Robust Construction
In keeping with Akai's top quality parts utilization policythe 1722W incorporates top quality parts and features robust construction and sturdy mechanism. Our dependable two lever control system ensures further durability.

Automatic Shut-Off
A special feature of this model is the Automatic Shut-Off function of the unit. When the Automatic Shut-Off Switch is set to On position, the power of the entire unit is cut at the enr of the tape. A very convenient feature should the reorder be left unattended.

Instantly Convertible To a Public Address System
For a full bodied P.A. System, simply set rear panel Speaker Switch to PA position and set recorder to recording mode. Microphones are used to activate the speaker system.
 Pause Control
The 1722W is equipped with pause control for momentarily suspending tape travel during reording or playback. Especially useful for editing tape during recording. Just lift the Pause Lever when a certain portion of the program is not desired. Pause control also permits optimum adjustment and balance of recording level prior to recording for consistent signal level input. Convenient Start Button release.

Built-In Equalizer Amplifer for Direct Recording or Playback with Phono Cartridge
Connection to the front panel Mic/Phono Jacks through an RCA/Mic plug connection cord and setting the rear panel Mic/-Phono Switch to Mic position activates the built-in phono equalizer amplifer for direct recording from a magnetic phono cartridge.

Built-In Speakers Plus Speakers Jack
Alough a handy compact model, the 1722W is equipped with two 5 x 7” built-in speakers for sufficient speaker output even where space is limited. Also equipped with Speaker Jacks for utilization of a larger speaker system if desired.
 Multiple Connections and Controls Include DIN Jack for Easy Connection with an External Amplifier
Line and DIN inputs and outputs connections and multiple controls facilitate varied operation. The DIN Jack can be used instead of Line Input and Output Jacks. This one cord connection system facilitates easy recording and playback through an external amplifier as the complex connection and disconnection of four separate cords is eliminated.

Tape Counter with Reset Button
Handy 3-digit Tape Cou ter with Reset Button provides a quick refrence for locating positiones on the tape.

Practical Built-In Reel Retainers
Convenient buil-in reel retainers firmly lock reels into place and provide equal reel tension. Easy to lock and release.
Track System:  4-track, 2-channel stereo/monaural system
Reel Capacity:  up to 7” reel
Tape Speed:  7-1/2 and 3-3/4 ips (±2%)
Heads:  1 x recording/playback; 1 x erase
Motor:  2-speed induction motor
Fast Forward & Rewind Time:  80/100 sec. Using a 1200 ft tape at 60/50 Hz
Recording Capacity:  3 hours stereo recording using a 1800 ft tape at 3-3/4 ips
Wow and Flutter:
less than 0,14% RMS at 7-1/2 ips
less than 0,18% RMS at 3-3/4 ips
Equalization:  Correct equalization for playback of tapes recorded to NAB curve
Frequency Response:
Wide Range Tape:
30 - 21,000 Hz (±3 dB) at 7-1/2 ips
40 – 15,000 Hz (±3 dB) at 3-3/4 ips
Low Noise Tape:
30 - 18,000 Hz (±3 dB) at 7-1/2 ips
40 – 13,000 Hz (±3 dB) at 3-3/4 ips
Distortion:  less than 2% (1000 Hz „0” VU)
Continnuous Power Output:  2 Watt/channel, minimum RMS, at 8 Ω load impedance from 75-20,000 Hz, with no more than 2% THD
Signal-to-Noise Ratio:  better than 50 dB
Cross-Talk:  better than 60 dB [mono]; 45 dB [stereo]
Output Jacks:
Line :  1,23 V („0” VU) / 30 Ω 
Required load impedance :  more than 10 k Ω
Phone :  100 mV/8 Ω
Speaker :  2 W/8 Ω  each
Input Jack:
Microphone :  ,5 mV/100 k Ω
Line :  150 mV/330 k Ω
Din Jack :  1 V/15 mV
Speaker:  2 built-in 5 x 7” speakers
semiconductors:  16 Transistors; 4 Diodes
Power Requirement:  120 V, 60 Hz
Power Consumption:  50 W
Dimensions (W x H x D):  358 x 360 x 248 mm (14” x 14,1” x 9,8”)
Weight:  13,2 kg (29 lbs)

Luxman PD-300

 High-Inertia, Belt-Drive, Arm-less Turntable with Vacuum Disc Stabilizer
 An Integration of Record Disc and Turntable Platter by Means of Vacuum Suction. Total Banishment of Modulation Caused by Warp or Resonance of Record Disc.
The playback method of record disc has been unchanged for all ages -- simply to put a disc on the platter and then to place a pick-up on the disc. But this simple operation comprises various problems. Among others, what cannot be neglected in terms of sonic quality is self-resonance of the record disc. Such harmful additives not contained in the original signals have to be removed by all means for purest fidelity reproduction.
So far, many audiophiles have tried to make improvements in this respect utilizing so-called audio stabilizer of special platter mat. But no definite solution has been given to the problem of this noxious modulation triggered by a slight warp or resonance of the disc itself.
The V.D.S. system is to integrate the record disc and turntable platter, so to say, to make a record disc of high inertia. By removal of the air between the disc and platter, atmospheric pressure changes itself into a stabilizer, which works evenly throughtout an entire surface of the disc. This is truly an ideal turntable system.

The PD-300 is the first turntable incorporating the discc sucking system, where a vacuum pump of simple robust construction is employed with application of the theory of bellows. To suck out the air, grooves and sucking hole are provided on the surface of the platter, and the air passage inside the platter is connected to the pump by means of tube.
The pressure given to the sound grooves is equivalent to placement of 30 kg stabilizer in terms of weight,, and perfect stabilization effect is ensured.

Suction and its release can be done by simple one-touch operation of the suction lever provided at the front of the cabinet, thus ensuring easy accessibility. Normally the lever is placed horizontally, and when it is turned upright, sucking function is activated. When the specified level of suction is reached, the indicator turns from orange to green. This indicator functions quite accurately by sensing the vacuum degree between the platter and disc.

The idea of the V.D.S. system came from the disc-sutting lathe. But the system employed at the lathe is to sustain the vacuum state by keeping sucking, which inevitably  causes noises and vibrations. Therefore, with the PD-300, to keep airtight the special sealing pads are placed on the surface of the platter positioning on the outer and inner rings of sound grooves of LP disc. Thanks to the pads, once sucked, the vacuum state can be sustained for long. The pad remains unchanged in quality for long time, but for eventual replacement it is so designad as to be easy in installation.
The object of the V.D.S. system is to remove harmful resonance from the turntable having perfect basic performances. Thus it is important to remove unnecessary vibrations in the rotation mechanism, not to speak of improvement in such fundamentals as S/N ratio, speed accuracy, etc. In this respect, the belt-drive system is used, and the motor is placed away from the orbit of the cartridge to evade influence of its flux and vibration.
The high-inertia platter having 3,5 kg weight and 500 kg/cm² inertia moment is driven by a high-performance, brushless, slotless DC servo motor that turns slowly at the ratio of 10 times as compared with that of the platter, which helps suppress vibration, and now totally noiseless rotation is realized by huge amount of energy thus obtained.
From Bearing Portion to Arm-base Fixing Portion to Remove Resonance. In Addition, Double Insulation System to Shut off External Vibrations.
The ultimate style of turntable is that only the stylus tip vibrates on the solid base where all portions are integrated from the bearing to the tonearm. The PD-300 is perfectly unified in this respect with provisions for interchangeability of tonearm. The unified main chassis of solid bearing and arm-base receptacle is made by die-casting of aluminum, to which a heavy arm-base is fixed by 6 bolts. Then put the platter and tonearm, and the sturdy-built frame of the PD-300 is now completed. On top of the suction effect, thanks to this unified structure, all sources of undesired vibrations are eliminated from the playback loop, namely, record disc - turntable - tonearm. Brilliant birth is now given to truly  "Non-Resonant" turntable system.

Effective Insulator
Impeccable counter-measures are provided against external vibrations as well. One is the main insulator inserted between the main chassis and the heavy cabinet of solid structure, and the other is the large-sized sub-insulator provided at the legs of the cabinet. This double-insulation system safeguards the function of "non-resonant" body from external vibrations.
3 main insulators are placed on the main chassis, which hangs and damps the integrated playback block from the main cabinet. Here featured is LUX's exclusive 2-step damping insulator. The high-compliance natural rubber supporting the shaft cuts-off the vibrations of small amplitude, while combination of spring and biscous brake of silicon grease effectively works against those of large amplitude. The horizontal balance of the platter can be adjusted by these insulators.
The large sub-insulators using natural rubber of good quality are provided at the 4 legs, which not only support the cabinet but damp the vibrations from the placement base. These insulator allow horizontal adjustment of the entire turntable.

Abundant Accessories
Fine Adjustment of Rotation.
You can fine-tune the turning speed while monitoring the stroboscope placed beside the platter. Independent adjustment is posible for 33 and 45 rpm formats by means of controls provided underneath the cabinet. The strobo pattern displayed by blinking light of crystal oscilator provides precise adjustment of the turning speed.
Overhang Adjustment
Generally speaking, the overhang adjustment requires much time, as the fixing screws of a cartridge have to be loosened. With this unit, the overhang can be easily adjusted by turning the arm-base, as the fixing hole of the arm-base for your tonearm is drilled out of its centre. Furthermore, the fixing hole for the bolt at the main chassis has sufficient tolerance and its subtle adjustment ensures the optimum overhang.
Heavy Arm-Base (optionaly available)
It  is  a well-known fact that in the whole playback system of audio components the change at very input and output, i.e., cartridge and loud-speakers causes the most conspicuous variations to the tonal quality of playback sounds. Therefore, some have such wishes to interchange various components depending on the music sources, et. Also many desire to have special combination of their own at this input section of the turntable system according to their personal taste. To cater for such requirements of audiophiles the PD-300 employs a detachable arm-base for easy replacement of tonearm. This heavy, feedback-resistant arm-base is made of planed aluminum plate having 88 mm thickness which can be firmly fixed by 6 bolts. 4 different kinds are prepared for sale on option, and you can use most tonearms available in the marketplace.
Phono Motor Section
Driving System:  Belt-drive
Motor:  Brushless and Slotless DC Servo Motor
Turntable Platter:  Aluminum-cast
Diameter :  300 mm (12")
Weight :  3,5 kg (7,7 lbs)
Inertia Moment:  500 kg/cm²
Rotation:  33-1/3 and 45 rpm
Adjustable Range of Rotation:  ±3%
Wow and Flutter:  no more than 0,03% (WRMS)
Signal-to-Noise Ratio:  better than 60 dB (IECB)
Run-up Time:  within 3 seconds (within ¾ rotation for 33 rpm)
Power Requirement:  110 - 120 0r 220 - 240 V, 50/60 Hz
Power Consumption:  15 W
Dimensions (W x D x H):  490 x 390 x 200 mm (19,6" x 15,6" x 8:)
Weight:  18 kg (39,6 lbs) net
Additiona Features
Vacuum Disc Stabilizer:  manual type
Stroboscope:  Illumination by built-in quartz oscillator
Acrylic Cover:  4 mm thick, detachable, 1,8 kg (4 lbs)
Insulator:  Double Insulation System with Horizontal Balance Adjust Facility
Tonearm Base:  Detachable