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

Nakamichi 700

 Tri-Tracer 3-Head Cassette System
Nakamichi 700 is our challenge to the highest performance comparable to Nakamichi 1000 which has created sensations in the hi-fi industry and to the easier-to-buy pricing as a result of Nakamichi's efforts in production rationalization. Nakamichi 700 is accepted by the audiophiles in its highest cost performance as the basic design policy of the Tri-Tracer rules the entire transport mechanism and electronics without compromise.
 Since the introduction of Nakamichi Tri-Tracer the cassette recorders have now been accepted by the professionals and audiophiles as the true hi-fi component same as the reel-to-reel tape decks in terms of frequency response, dynamic range, wow and flutter, tape speed accuracy, signal-to-noise ratio, etc.
"Hearing is believing" - please  confirm the top performance of Nakamichi 700 by your simple hearing test which can only be achieved with the true 3-head cassette recorder Nakamichi 700
 "Tri-Tracer" is a pet name created by Nakamichi Research Inc. for a series of professional quality 3-head cassette decks starting from Nakamichi 1000 as top of the line.
"Tri-Tracer" is a 3-head system which traces the fundamental performance of the tape deck in terms of frequency response, distortions, signal-to-noise ratio and wow and flutter with the highest possible standards.

Complete Plug-in Electronics
Electronics circuitry eliminates all connecting wires with a complete plug-in system consisting of six printed circuit boards plugged onto a single main circuit board. Each unit amplifier is using the top quality transistors and assures the best possible performance … the microphone amplifier with 60 dB dynamic range is one example.
3-Head Configuration
Completely separate record, playback and erase heads configuration permits instantaneous off-the-tape monitoring and ensures the best possible frequency response, up to 20 kHz constantly. The record head is of hi-Mu ferrite with a 5 micron gap designed to obtain deep and intensive recording. The playback head is of special hi-Mu hard permalloy cores and thin titanium film spacer which enables the gap to be as narrow as 0,7 micron.

Alignment Beacon
A unique and simple way in which a pair of pilot lamps flicker alternately when a correct head azimuth alignment is obtained. It eliminates the poor high-end response and phase shift created by the change in tape running condition due to dimansional difference among various brands cassette tape enclosures.
 Tape Drive Mechanism
Closed loop double capstan, staggered large flywheels maintain perfect tape tension across the 3-heads with ultra-low wow and flutter. Also phonic-wheel type DC servomotor maintains correct speed at all times against voltage and frequency fluctuation.

Peak Limit
Although the record amplifier in the Nakamichi 700 has very wide dynamic range so that the distortion may hardly occur in normal sound recording. However, in case of live recording the distortion may occur due to excessively wide dynamic range of sounds to be recorded, and the built-in Peak Limiter minimizes such distortion.
 dB Peak Level Meter
The Nakamichi 700 is equipped with level meters indicating the peak level in recording so that they effectively eliminate the risk of over-recording.

3-Point Sound Pickup
Other than the normal two microphone inputs the third input for the blend microphone is provided and each input level can be adjusted independently so that the professional quality mixing is available. The blend microphone is especially useful for recording of solo vocal or solo instrument.
Pitch Control
Any speed within the range of ±6% can be selected. This control is for correction of tape speed previously recorded off speed and for playback at higher and lower pitch in music lessons and other wide applications.

IC Logic Electronic Control
All tape motion controls are solenoid operated, with light finger touch buttons. IC control logic circuit produces any sequence control of complicated timing which assures the user complete freedom from click noise. Other automatic controls such as automatic shut-off, memory rewind, and record lock are also provided. The position in motion will be indicated by illuminated lamps above each control button

Other Features:
Dolby Noise Reduction System
Two-Motor Drive System
Tape Selector Switch for Low Noise and Cromium Dioxide Tape
Built-in Dolby level Adjustment Device
Pneumatic Controlled Anti-boucing Head Assembly System
Pneumatic Controlled Cassette Ejecton.
Heads:  3 separate for record, playback and erase
Motor:  DC servomotor
Tape Speed:  1-7/8 ips ±1%
Wow and Flutter:  less than 0,12% (DIN 45507 weighted peak)
Frequency Response: 
35 - 18,000 Hz  ±4 dB (Dolby In, Low noise tape)
35 - 20,000 Hz ±4 dB (Dolby In, CrO₂ tape)
Signal-to-Noise Ratio:  better than 60 dB (Dolby In, DIN 45405 weighted at 3% Distortion)
Total Harmonic Distortion:  less than 2% (at 1 kHz, 0 db)
Erasure:  better than 60 dB (at 1 kHz, saturation level)
Channel Separation: better than 35 dB (at 1 kHz, 0 dB)
Cross Talk:  better than 60 dB (at 1 kHz, 0 dB)
Bias Frequency:  105 kHz
Microphone :  0,5 mV/600 Ω
Blend Mic. :  0,5 mV/600 Ω
DIN Mic. :  0,5 mV/600 Ω
Line :  100 mV/100 k Ω
DIN Radio :  25 mV/50 k Ω
Line :  1,0 V Max. (variable)
DIN Line : 1,0 V Max. (variable)
Headphones :  1 mW 0 dB
Semiconductors:  105 Transistors; 38 Diodes; 8 IC's
Power Supply:  100/ 117/ 220/ 240 V, 50/60 Hz
Power Consumption:  60 W Max.
Dimensions (W x H x D):  20,5" x 10,7" x 5,1"

Weight:  28 lbs

Harman Kardon HD 7400

18-bit linear D/A converter.
Fully discrete analog output section with 12 separate transistors and 6,400 µF of power supply storage.
4 separate power supplies for digital, analog, transport, and display.
3-beam optical laser pickup.
36-Program memory
Rear panel remote control jacks
Audible two-speed cue and review.
Display: track number/ elapsed time/ program number or total number of tracks/ total time/ time remaining.
19-key wireless remote
 18-Bit Technology Withstands the Test of Time
Whether they use Bit Stream or 18-bit digital technology, Harman Kardon compact disc players are distinguished by superior internal layout, quality components, and excellent power-supply and grounding-system design.
Harman Kardon'a 18-bit compact disc players have major advantages over competing brands in the same category. Our units are adjusted in the factory for precise, low level linearity, allowing for clearer, more dynamically accurate, less distorted  low level signals. And as with our bit stream players, we use only discrete circuits along the analog audio signal path.

It isn't every company that applies the same standards to its compact disc players as it does to its amplifiers. Removing the top from ordinary compact disc players reveals that most dedicate only an averange of five percent of internal circuitry to the analog audio section, while Harman Kardon commits 25 to 30 percent, depending on the model. Buyers can literally see the quality of design.
 Discrete Analog Compact Disc Output Stages
Sound signals travel through analog circuitry before arriving at the compact disc player's output jacks. Those stages may employ mass-produced integrated circuits or custom-designed discrete circuits.
Harman Kardon uses only discrete circuits along the audio signal path, insuring that the best possible sound produced by the sampling and conversion systems is achieved.
Discrete circuits embody close-tolerance resistors, capacitors,, and fast-slew-rate transistors. The benefit is wider bandwidth and minimal negative feedback, both of which are critical to the compact disc player's amplifier stages.
System:  Compact Disc Digital Audio
D/A Conventer:  Linear, 18-bit; 4x Oversampling (176,4 kHz)
Signal Detection:  3-beam semiconductor optical laser pickup
Error Correction:  CIRC system
Low level Linearity:  -80 dB (±1 dB)
Frequency Response:  4 Hz - 20 kHz (+0 dB, -1,5 dB)
Total Harmonic Distortion:  0,009%
Dynamic Range:  96 dB
Signal-to-Noise Ratio:  100 dB
Channel Separation:  88 dB
Line Output Level/Impedance:  2,0 V at 10 k Ω
Digital Output Level/Impedance:  none
Power Consumption:  15 watts
Dimensions (W x H x D):  443 x 103 x 328 mm (17-3/8" x 4" x 13")

Weight:  5,0 kg (11 lb)

Harman Kardon HD 7300

18-bit linear D/A conventer
Fully discrete analog output section with 12 separate transistors and 6,400 µF of power supply storage.
4 separate power supplies for digital, analog, transport, and display.
3-beam optical laser pickup.
Program memory.
Audible 2-speed cue and review.
Display: track number/ elapsed time/ program number, or total number of tracks/ total time/ time remaining.

System:  Compact Disc Digital Audio
D/A Conventer:  Linear, 18-bit; 4x Oversampling (176,4 kHz)
Signal Detection:  3-beam semiconductor optical laser pickup
Error Correction:  CIRC system
Low level Linearity:  -80 dB (±1 dB)
Frequency Response:  4 Hz - 20 kHz (+0 dB, -1,5 dB)
Total Harmonic Distortion:  0,009%
Dynamic Range:  96 dB
Signal-to-Noise Ratio:  100 dB
Channel Separation:  88 dB
Line Output Level/Impedance:  2,0 V at 10 k Ω
Digital Output Level/Impedance:  none
Power Consumption:  15 watts
Dimensions (W x H x D):  443 x 103 x 328 mm (17-3/8" x 4" x 13")

Weight:  5,0 kg (11 lb)

Pioneer SX-1500TD

 A Powerful Receiver of Tremendous power and Fidelity, Beautifully Packaged in the Most Up-to Date Design.
The SX-1500TD features highly advanced circuitry. An FET frong and ensures extremely sensitive FM reception. There are four IC's in the IF section for excellent selectivity, and a monolithic IC in the multiplex section for improved separation. Silicon transistors ensure low-noise music power of a tremendous 180 watts. In addition, a fine dynamic microphone comes with the SX-1500TD for microphone mixing. You can connect up to three different stereo loudspeaker systems. Uniquely attractive, with its silver and black contrast and polished rosewood end-pieces.

 Center Channel Output
The SX-1500TD has a center channel output on the rear panel, providing the composite signal (L+R) for a 3-D (three-dimensional) system, when you connect another amplifier to the center channel output.  In addition, stereo music can be recorded into a monophonic tape recorder with this output which is controlled by the preamplifier section of the SX-1500TD.
 Phono Inputs
The SX-1500TD has two sets of phono inputs, enabling you to compare cartridges. Phono 1 is for magnetic and ceramic cartridges, and Phono 2 is for magnetic cartridges.

AC Outlets
There are three AC outlets for turntables and tape decks used with the receiver, a switched AC outlet for 230 VA and two unswitched AC outlets for 230 VA.
FM Section
Circuity:  Front end using FET and 4-gang variable capacitor, IF amplifier using 4 IC's
Frequency Range:  87,5 to 108 MHz
IHF Usable Sensitivity:  1,7 µV
Capture Ratio:  0,7 dB 9at 98 MHz)
Image Rejection:  72 dB (at 98 MHz)
Selectivity:  40 dB (IHF rating)
Signal-to-Noise Ratio:  60 dB (IHF rating)
Antenna Input:  300 Ω (balanced)
Multiplex Section
Circuitry:  Time-switching type demodulator using IC, FM mono/stereo automatic selection
Channel Separation:  38 dB (at 1 kHz)
AM Section
Circuitry:  Superheterodyne
Frequency Range:  525 to 1605 kHz
IHF Usable Sensitivity:  18 µV
Image Rejection:  77 dB (at 1,000 kHz)
Antenna Input:  Built-in ferrite loopstick antenna
Audio Section
Circuitry:  Single-ended push-pull
Music Power Output:
180 watts total at 4 Ω (IHF rating)
145 watts total at 8 Ω (IHF rating)
Continuous Power Output (each channel driven): 
70 watts / 70 watts at 4 Ω;
58 watts / 58 watts at 8 Ω
Harmonic Distortion:  less than 0,5% 9at 1 kHz rated output)
Damping Factor:  50 at 8 Ω (at 1 kHz)
Frequency Response:  10 to 10,000 Hz ±2 dB
Power Bandwidth:  15 to 40,000 Hz  (Aux/IHF)
Hum and Noise (at rated output):
Mag :  better than 80 dB
Aux :  better than 100 dB
Inputs Sensitivit/Impedance (for rated output):
Magnetic Phono :  3,3 mV/50 k Ω
Ceramic Phono :  24 mV/100 k Ω
Microphone :  3,2 mV/30 k Ω
Tape Monitor :  200 mV/100 k Ω
Aux :  200 mV/100 k Ω
Main In :  480 mV/80 k Ω
Outputs Terminals and Jacks:
Speaker Impedance 4 to 8 Ω
Stereo Headphone jack
Simultaneous tape recording jacks, equipped with Tape Monitor switch
Tape Recording/Playback jack (DIN standard)
Pre-amplifier output jakcs
Center channel output jack
Equalization Curve:  Phono RIAA
Tone Controls (each channel): 
Bass :  boost 11 dB, out 16 dB at 50 Hz
Treble :  boost 10 dB, out 9 dB at 10 kHz
Low :  out 8 dB at 50 Hz
High :  out 6 dB at 10 kHz
Loudness Contour:  Switchable to On-Off, boost 12 dB at 50 Hz, boost 9 dB at 10 kHz, with Volume control set at -40 dB
Power Supply:  110, 117, 130, 220, 240 V (switchable), 50/60 Hz, 250  VA, 230 watts max
Dimensions (W x H x D):  459 x 145 x 369 mm (18-1/16" x 5-11/15" x 14-1/2")

Weight:  11,4 kg (25 lbs 2 oz) net

Thorens TD-105 Mk2

 The Thorens TD 105 semi-automatic high fidelity turntable incorporates advanced technical features to afford true state-of-the-art. Performance.
It employs a special Thorens suspension system for the floating chassis. The exclusive Isotrack tone arm with precision bearing assembly and low-mass construction enables optimum tracking characteristics to be realized with modern pickup cartridges.
 The TD 105 also employs a velocity-sensitive electronic shut off which raises the tone arm, returns it to its rest, and stops the motor. The electronic shut off at the end of a record operates without frictional contact with the tone arm, ensuring precise performance and full protection of the record and pickup stylus.  All operating functions are initiated by electronic switching keys which respond to a light touch of the finger.

Drive System:  1 step belt-drive
Motor:  DC motor with 72-pole tachogenerator
Speeds:  33 and 45 rpm, electronic speed selection
Motor Speed Control:  electronic regulation with load correcting automatic pitch control
Pitch Control:  ±6% illuminated stroboscope
Turntable Platter:  1,3 zinc alloy, dynamically balanced
Platter Diameter:  30 cm (12")
Wow and Flutter:  ≤0,05% according to DIN 45507
Rumble Unweighted:  48 dB according to DIN 45539
Rumble Weighted:  65 dB according to DIN 45539
Tonearm TP-22
TP 63 Cartridge Wand
Effective Arm length:  222 mm (8 ¾")
Effective Mass:  7,5 g
Stylus Overhang:  15,5 mm
Offset Angle:  23°
Lateral Tracking Error:  ≤ 0,18°/cm of radius
Skating Compensation:  spring force
Tracking Force:  set with counterweight dial
Bearing Friction:  ≤ 0,25 mN (25 mp) in both planes
Cable Capacitance:  230 pF ±10%
Line Voltage:  may be connected to any line voltage using the appropriate Thorens AC adapter
Power Consumption:  5 watts
Dimensions (W x H x D):
Closed :   435 x 125 x 355 mm (17-1/8" x 5" x 14")
Opened :  435 x 372 x 395 mm (17-1/8" x 14-5/8" x 15-5/8")

Weight:  5,5 kg (12 lbs) net

Teac A-1200

 The Teac Model A-1200U Stereo tape Deck features a three-motor drive system providing independent drive for the capstan and each reel turntable to assure prolonged life of tape transport mechanism, minimum wow and flutter, constant and stable tape travel, and easiest possible operation. Also, three Teac techno-built precision heads, instant pff-the-tape monitoring, sound-on-sound and stereo echo recording, choice of four-track operation, and other highlights are combined to offer profesional quality with operating versatility.
 Three-Motor Drive System
Teac A-1200 contains three independent motors for driving capstan and each reel turntable. A "Dual-Speed Hysteresis Synchronous Motor" provides capstan drive with an effective starting torque  and enables electrical speed change. Capstan motor synchronization assures stable and constant tape run without variations caused by AC voltage fluctuations or other external causes. Electrical speed change found in comparable machines on the market. Two original Teac "Outer-Rotor Motors" are used for reel drive. An externally rotating housing produces a unique flywheel effect to offer smooth and steady motor drive with minimum tape rewinding tension.
In addition, employment of three motors adds years of life to tape transport mechanism, assures the least wow and flutter and the easiest possible operation.  Includes Remote Control System for start and stop of main deck (optional accessory).

Three Teac Techno-Built precision Heads
Teac is known as a leading manufaacturer of instrumentation data recorders, professional audio and video equipment, and even magnetic tape systems for electronic computers. The same technology and manufacturing facilities are just naturally used for all the tape heads manufactured by Teac.  Thus, assured are the wide frequency range, minimized crosstalk, improved signal-to-noise ratio, and distortion-free sound reproduction with all Teac tape machines. Further, three heads operate independently  and enable you to enjoy mike-line mixing and instant off-the -tape monitoring
 Instant Off-the-Tape Monitoring
Recorded signal can be monitored instantaneously using "Monitor" Switch. As the playback head is installed next to recoding head, recorded signal can be played back and evaluated 0,15 second (at 7-1/2 ips) after recording, without interruption of recording.

Built-in-Moke-Line Mixer
Teack A-1200 has two separate input level controls for microphone and line, and enables you to record signals from mike, mixing with signals from a tuner, turntable, or other tape deck connected with its line input. Also, you can have extra enjoyment with Sound-on-Sound and StereoEcho by simple pushbutton operation.

Choice of 4-Track or 2-Track
Instead of standard 4-track 2-channel stereo operation, 2-track 2-channel stereo mode is available as a special order for more critical audiophiles. Specify this to your dealer when purchasing Teac A-1200

All Easy-to Operate Pushbutton System
Ten pushbutton are placed at the lower left corner of front panel and activate any desired operation at feather-light touch.

Automatic Shut-off: at the end of the tape travel
Automatic Tape Lifter: protects head from contact with tape during fast run and adds years of life to both heads and tapes.
Four Independent Preamplifiers: for assured playback and recording of both channels. Fully transistorized for the shortest warm-up time.
100 kHz Bias Oscillator: eliminates stereo beat and minimizes distortion
Very Short time for Winding or Rweinding
4-Digit Pushbutton-Rest Index Counter
Easy-to-Read Dual VU meter
Headphone Monitoring
Vertical or Horizontal Operation
Handsome Walnut Cabinnet
Luxurious Stainless Steel Front Panel
Heads:  Three for Rease, Record and Forward-playback; 4-track stereo or mono
Reel Size:  7' maximum
Tape Speed:  7 ½ ans 3 ¾ ips (±0,5%)
One  Dual-speed hysteresis synchronous motor for capstan drive;
Two Eddy-current type outer-rotor motors for reel drive
Wow and Flutter [7 ½ / 3 ¾]:  0,12% / 0,15%
Fast Winding Time:  approx. 100 seconds for 1200 feet
Frequency Response:
30 to 20,000 Hz for 7 ½ ips (±3 dB 50 to 15,000 Hz)
30 to 15,000 Hz for 3 ¾ ips (±3 dB 50 to 10,000 Hz)
Signal-to-Noise ratio:  50 dB
Crosstalk: 50 dB channel-to channel at 1,000 Hz / 40 dB between adjacent tracks at 100 Hz
Microphone :  10,000 Ω 1 mV minimum
Line :  100,000 Ω 0,1 V minimum
Output:  1 V for load impedance of 10,000 Ω or more
Monitoring Headphones:  10,000 Ω minimum
Power Requirements:  115 V AC, 60 Hz 100 W nominal
Dimensions:  17" x 15 ½" x 9 ¾"
Weight:  41 lbs

Optional Accessories:  RC-101 remote control unit / HP-102 headphones

Technics SH-R 808

 Infra-Red Wireless Remote Control
 Operation of Receiver
  1. The receiver consists of a PIN photo diode, amplifier, LC tuning circuit, detection circuit, and wave-form shaping circuit (Schmitt Trigger), and it changes the infrared signal from the transmitter into the original 10-bit signal.
  2. The 10-bit pulse signal is processed by the microcomputer, and then the necessary remote control signal is taken out from each output port.
  3. The output interface is a circuit to facilitate the conection with each equipment, and it is an inverter using an open collector.
Operation of Transmitter
  1. MN6025C is an 5-bit IC which can generate 25 kinds of signals. The oscillation frequency is 396 kHz and is divided by 12 to obtain 33 kHz which is used as modulation frequency. It is further divided by 16 to achieve 2,06 kHz which is the clock frequency of this IC.
  2. When the keyboard is depressed, Mn6025C starts oscillating and generates series pulses of 5 bits plus inverse 5 bits, totalling 10 bits, according to the key position.
  3. The 10-bit pulse signal is modulated by 33 kHz carrier.
  4. The modulated signal from MN6025C is applied to the infrared LED and command eye LED drive circuits. With oscillation time is about 60 msec. required for 10 bits, while the lighting up time of the command eye is set at about 0,5 sec.
 Electronic Volume Control
  1. In this control, five attenuators of -2 dB, -4 dB, -8 dB, -16 dB and -32 dB, and a muting circuit of -20 dB are turned On-Off by an analog switch for changeover in 32 steps renging from 0 dB to -6 dB and to ∞ by -2 dB each.
  2. The analog switch is driven by a 5-bit binary up-down counter, which is provided with last sound function due to the back-up signal from the tuner pre-amplifier.
  3. The volume control up-down switch gains 1 step in the initial 0,5 sec. of push, and keeping it depressed causes step-by-step volume control every 0,15 sec. When the switch is kept depressed, it takes about 5 secondes for the change from 0 dB to -∞ dB.
  4. A 5-bit IC (LC7500) is used as the controller for the electronic volume. With this IC, the five attenuators can be selected in 32 steps. The internal oscillation frequency 800 Hz is divided into pulses of 0,15 sec. period, and the pulses are counted at the counter circuit to select the attenuators.

When the volume up-down switch is pressed, three pulses are first counted to select an attenuator and subsequently the attenuators are selected every pulse.
Receiver Unit
Input Sensitivity / Impedance:  500 mV/27 k Ω
Maximum Allowable Input:  11 V
Total Harmonic Distortion:  0,015% (at rated output)
Signal-to-Noise Ratio:
At Rated Output :  90 dB (92 dB, IHF, A)
At -26 dB Output :  68 dB
Frequency Response:  20 Hz - 20 kHz , +0 dB, -0,5 dB
Residual Hum and Noise:  0,03 mV
Volume Control Range:  0 dB to -60 dB (2 dB steps),  -∞ in 32 steps
Muting:  -20 dB
Output Voltage [Rated/Maximum]:  500 mV / 3 V
Output Impedance:  2,2 k Ω
Channel Balance:  250 Hz to 6,300 Hz , ±1,0 dB
Chnnel Separation (1 kHz):  65 dB
Power Consumption: 6 W
Power Supply:  110, 120, 220, 240 V AC 50/60 Hz
Dimensions (W x H x D):  430 x 75 x 270 mm
Weight:  3,7 kg
Transmitter Unit
Effective Signal-Transmission Distance:  Approx. 7 m
Power Supply:  DC 3 V (two 1,5 V batteries)
Dimensions (W x H x D):  63 x 22 x 142 mm

Weight:  136 g (with batteries)

Technics ST-K 808

Technics Quartz Synthesizer FM/AM Stereo Tuner Preamplifier ST-K 808

Amplifier Section
Total Harmonic Distortion:  0,05%
Input Sensitivity/Impedance:
Phono :  2,5 mV/47 k Ω
Aux :  150 mV/27 k Ω
Tape Rec/Play :  180 mV/27 k Ω
Phono Max. Input Voltage (1 kh, RMS):  95 mV
Signal-to-Noise Ratio (rated output , 4 Ω):
Phono :  75 dB (IHF-A, 78 dB)
Tuner, Aux, Tape :  85 dB (IHF-A, 97 dB)
Signal-to-Noise Ratio (26 dB rated output, 4 Ω):
Phono : 62 dB
Tuner, Aux, Tape :  63 dB
Frequency Response:
Phono :  RIAA standard curve, 30 Hz - 15 kHz (±1,0 dB)
Tuner, Aux, Tape :  10 Hz - 50 kHz (- 1 dB); 20 Hz - 20 kHz (±0,4 dB)
Tone Controls
Bass : +10 dB: -10 dB  at 50 Hz
Treble :  +10 dB: -10 dB at 20 kHz
Subsonic Filter:  30 Hz, 6 dB/cot
High-Cut Filter:  7 kHz, 6 dB/oct
Loudness Control (volume at 30 dB):  50 Hz, - 9 dB
Output Voltage:
Output :  rated 0,5 V/600 Ω; max 10 V/600 Ω
Tape Rec/Play :  30 mV/82 k Ω
Channel Balance, Aux 250 Hz-6,300 Hz :  ±1,0 dB
Channel Separation, Aux 1 kHz :  55 dB
FM Tuner Section
Frequency Range:  87,5 - 108,0 MHz
Sensitivity:  1,9 µV (IHF, usable)
S/N 30 dB :  1,9 µV (300 Ω); 1,3 µV (75 Ω)
S/N 26 dB :  1,7 µV (300 Ω); 1,2 µV (75 Ω)
S/N 20 dB :  1,5 µV (300 Ω); 0,9 µV (75 Ω)
IHF 46 dB Srereo Quieting Sensitivity [mono/stereo]:  0,15% / 0,3%
Signal-to-Noise Ratio [mono/stereo]:  67 dB (73 dB, IHF) / 63 dB (68 dB, IHF)
Frequency Response:  20 Hz - 15 kHz, +0,5 dB, -1,5 dB
Alternate Channel Selectivity:  75 dB
Capture Ratio: 1,0 dB
Image Rejection at 98 MHz:  68 dB
IF Rejection at 98 MHz:  85 dB
Spurious Response Rejection at 98 MHz:  95 dB
AM Suppression:  55 dB
Stereo Separation:
At 1 kHz : 45 dB
At 10 kHz :  35 dB
Carrier Leak
At 19 kHz :  30 dB (35 dB, IHF)
At 38 kHz :  45 dB (50 dB, IHF)
Channel Balance (250 Hz - 6,300 Hz):  ±1,0 dB
Limiting Point:  1,2 µV
Power Bandwidth:
IF Amplifier :  180 kHz
FM Demodulator :  1000 kHz
Antenna Terminals:  300 Ω (balanced) and 75 Ω (unbalanced)
AM Tuner Section
Frequency Range:  522 - 1611 kHz
Sensitivity (S/N 20 dB):  30 µV, 300 µV/m
Selectivity (±9 kHz):  55 dB
Image Rejection at 1,000 kHz:  45 dB
IF rejection at 1,000 kHz:  45 dB
Timer Section
Clock:  Quartz-Lock Type, 24-hour indication
Precision:  within 0 sec - 10 sec monthly (at 25°C)
Functions:  24-hour programmable; every day (2 times), once only (1 time)
Programmable Content:  on off of program source (FM, AM, Phono, Aux)
Setting Intervals:  1 minute,23 hours, 59 minutes (at 1-min. Intervals)
Prioryty Order:  once, every day 2, everyday 1
Memory "back-up":  About 3 months (without AC power)
Power Supply:  110, 120, 220, 240 V AC, 50/60 Hz
Power Consumption:  20 W
Batteries for memory back-up (optional):  3 x AA size batteries DC 4,5 V
Dimensions (W x H x D):  430 x 75 x 310 mm (16-15/16" x 2-15/16" x 12-7/32")

Weight:  4,8 kg (10,6 lb)

Technics SE-A 808

 Technics Power Amplifier SE-A 808
Amplifier Section
Continuous Powetr Output (both channels driven):
20 Hz - 20 kHz :
2 x 40 W at 4 Ω ;
2 x 40 W at 8 Ω;
90 W at 8 Ω, BTL
40 Hz - 16 kHz :
2 x40 W at 4 Ω;
2 x 40 W at 8 Ω;
90 W at 8 Ω, BTL
1 kHz :
2 x 50 W at 4 Ω;
2 x 45 W at 8 Ω;
100 W at 8 Ω, BTL
Total Harmonic Distortion:
Rated power at 20 Hz - 20 kHz : 0,03% [4 Ω]; 0,02% [8 Ω]
Rated power at 40 Hz - 16 kHz : 0,03% [4 Ω]; 0,02% [8 Ω]
Rated Power ay 1 kHz : 0,03% [4 Ω]; 0,02% [8 Ω]
Half Power at 20 Hz - 20 kHz : 0,02% [4 Ω]; 0,01% [8 Ω]
Half Power at 1 kHz : 0,009% [4 Ω]; 0,006% [8 Ω]
-26 dB power at 1 kHz : 0,03% [4 Ω]
50 mW Power at 1 kHz : 0,05% [4 Ω]
Intermodulation Distortion:
Rated Power at 250 Hz : 8 kHz = 4;1, (4 Ω) :  0,03%
Rated Power at 60 Hz : 7 kHz = 4:1, (SMPTE, 8 Ω) :  0,02%
Power Bandwidth (both channels driven, -3  dB):  5 Hz - 45 kHz at 4 Ω, 8 Ω
Residual Hum and Noise:  0,5 mV
 Damping Factor:  16 at 4 Ω; 32 at 8 Ω
Input Sensitivity/Impedance:  500 mV/47 k Ω
Signal-to-Noise Ratio:  100 dB (108 dB, IHF-A)
Frequency Response:  20 Hz - 20 kHz, +0 dB, -0,2 dB [ 5 Hz - 60 kHz, -1 dB]
Channel Balance, (250 Hz - 6,300 Hz):  ±0,5 dB
Channel Separation (1 kHz):  60 dB
Headphones Output level/Impedance:  400 mV/330 Ω
Load Impedance:
Main or Remote :  4 Ω - 16 Ω
Main and Remote :  8 Ω - 16 Ω
BTL, Main or Remote :  8 Ω - 16 Ω
Power Supply:  110, 120, 220, 240 V AC, 50/60 Hz
Power Consumption:  460 W
Dimensions (W x H x D):  430 x 75 x 280 mm

Weight:  6,8 kg

Tannoy Oxford

 Tannoy's engineers were briefed to produce a range of loudspeakers - of modest dimension and price - which would retain that characteristic, and relese in your home that special magic  the musicans created. The result of their research and development are now available to you in the Stradford, Cambridge and Oxford loudspeakers.

Like all Tannoy Loudspeakers, these three models are highly efficient. This means that, in comparasion with many other loudspeakers, your amplifier will not have to be driven so hard to produce a realistic listening sound level, with less chance of producing a distorted signal. Your ears will tell you the difference, with the Tannoys producing a clean, truthful sound, which gives remarkable freedon from listening fatigue. Unlike some speakers with unrealistic "over Impressive" performance, you will not grow tired of our sound, and will appreciate your investment in Tannoy for many years.
 Tannoy Oxford
The Oxford uses the same HF compression driver, but matched to a 10" version of our polyolefin cone bass driver. This combination, mounted in a larger cabinet made from heavier weight material and walnut finish, offers the most extended frequency response, and highest peak power handling capacity of this range.
The high efficiency of the Oxford, as with all Tannoy Loudspeakers, enables you to reproduce in your home realistic sound levels from even modestly powered systems. Used in conjunction with quality electronics the lifelike detail and articulation of the Oxford is really quite outstanding. It is no wonder that the Oxford has been used professionally in monitoring the sound quality of live performance location recording.
 How do we produce such good sounds? Well, to start with we are manufactures of complete loudspeakers systems. The components of the Stradford, Cambridge and Oxford are designed and manufactured in our own factory. This enables us to provide unique solutions to acoustic problems that some other manufactures do not even recognise.
Take our tweeter for instance.
Conventional cone or dome tweeters will not easily accept high level music transients efficiently and without distortion. Our research programme produced the tannoy horn loaded compression driver. This remarkable device uses a special magnetic cooling fluid which enables it to handle far more power, and convert significantly more of that power into clean sound. The controlled sound dispersion also provides consistent stereo imager, which is less affected by the acoustic characteristics of your listening room than many conventional HF units.
 We certainly did not neglect the low frequency response of the Stradford, Cambridge and Oxford. Two bass/mid-range drivers were developed, both using a cone made by Tannoy from a polyolefin co-polymer - which provides a smoother, more extended frequency response - mounted within a rigid pressure formed metal frame. Our heavyweight magnet assembly provides high power handling with the legendary Tannoy efficiency.

Both drivers are mated to a crossover network carefully designed to provide optimum performance with low distortion. We ensure reliable performance by using only high quality components.

Last, but by no means least, we designed a damped, very rigid ducted port cabinet for each model, to give really solid bass response. Each cabinet has a Walnut finish -  and the detachable acoustic foam grille of each model carries the famous gold badge of Tannoy - The Name for Loudspeakers.
Rec. Amp. Power (RMS per channel):  10 - 100 W
Peak Power Handling:  150 W
Nomial Impedance:  8 Ω
Sensitivity (1W at 1 m) [Domestic /Anechoic]:  93 dB / 90 dB
Nominal Frequency Response:  50 Hz - 20 kHz, ±3 dB
Drive Units
High Frequency : Horn loaded compression driver
Low Frequency :  Polyolefin cone 254 mm (10")
Crossover Frequency:  4 kHz
Bass Loading:  Ducted port
Cabinet Construction (High density chipboard):  Rear/Baffle 18 mm;  Carcase 15 mm
Grille:  Acoustic foam detachable
Dimensions (W x H x D):  355 x 560 x 270 mm (14" x 28" x 12")

Weight:  12,5 kg (27,6 lb) net