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

Audio Research Dual-100

Audio Research Dual-100 Features:
Exclusive New Circuitry (Patented and Patent Pending)
Quality Construction
1/8" anodized aluminum chassis;
Silicon power supply;
Choke filtering;
Heavy duty epoxy-glass circuit board;
Conservative design;
Many precision parts;
Extra quality components;
Thermistor controlled warmup.
Conservative Specifications
Unique Guarantee (Investment protected; 5 years, part and workmanship; 2 years, vacuum tubes/home use; registered warranty transferable)

Ultra Stable Performance: Ideally suited for complex loads such as electrostatic speakers (may be operated into open circuit or any combination of reactive and/or resistive load)
 Unique Circuitry - Delivers superior performance under dynamics of music
 Overload Stability - and lack of crossover distortion provides clean effective loudness of much larger amplifier.

In the evolvement of the Dual 100 design, foremost consideration has been placed on listening quality. Needless to say, there was no place for the "but we've always done it this way" philosophy in its design. Certain well-known principles (but seldom used) are obviously  retained, such as quality of construction, an an adequate power supply. From a circuit standpoint, however, little of it resembles convention.
 One patent has been issued, another is pending, and even beyond thgis, the circuitry is unique. Interestingly enough, it is also very straight-forward and remarkably long-term stable.
 The output stage is one of these unique circuits, and needless to say, it does main fixed regardless of amplitude or complexity of signal.

Frequency Response:
30 Hz to 15 kHz at 1 watt ±1 dB
30 Hz to 15 kHz at 75 watts ±1 dB
Sine Wave Power:  at least 75 watts RMS 30 Hz to 15 kHz
Harmonic Distortion:  less than 0,15% at 1 kHz at 75 watts
Hum and Noise:  at least 80 dB below rated output
Input Sensitivity:  1,0 V RMS for rated output
Impulse Distortion:  essentially none 30 Hz to 15 kHz
Permissible Loads:  Open circuit, resistive, capactive, inductive, or any combination, series or parallel
Output Impedance:  4, 8, 16 ohms
Load Regulation:  from 16 Ω resistive load to open circuit less than 1 dB change 1 kHz
Dimensions  (whd):
Power Supply :  17" x 13" x 10-1/2"
Amplifier :  17" x 13" x 8"
Power Supply :  88 lbs
Amplifier :  45 lbs

Teac EQA-110

10-band equalization
±12 dB adjustable range
Independent L/R adjustment

Number of Channels:  2
Number of Bands:  10
Center Frequencies:  30, 60, 125, 250, 500, 1k,2k, 4k, 8k, 16 kHz
Boost/Cut Range:  ±12 dB
Inputs Nominal Level/Impedance:  0,3 V/47 k Ω
Outputs Max. Level/Impedance:  6,0 V/1 k Ω
Frequency Response:  10 - 100,000 Hz ±1 dB
Total Harmonic Distortion:  0,01%
Signal-to-Noise Ratio (IHF-A weighted):  90 dB
Dimensions (W x H x D):  435 x 83 x 213 mm
Weight:  2,5 kg

Teac EQA-220

10-band spectrum analyzer display
10-band equalization
±12 dB adjustable range

Number of Channels:  2
Number of Bands:  10
Center Frequencies:  30, 60, 125, 250, 500, 1k,2k, 4k, 8k, 16 kHz
Boost/Cut Range:  ±12 dB
Inputs Nominal Level/Impedance:  0,3 V/47 k Ω
Outputs Max. Level/Impedance:  6,0 V/1 k Ω
Frequency Response:  10 - 100,000 Hz ±1 dB
Total Harmonic Distortion:  0,01%
Signal-to-Noise Ratio (IHF-A weighted):  90 dB
Dimensions (W x H x D):  435 x 83 x 213 mm
Weight:  2,7 kg

B&O Beogram 3404

Bang & Olufsen Beogram 3404
Meet the Beogram 3404, an intelligent, thoughtful an dvery well spoken turntable.
Like all Bang & Olufsen turntables, the 3404 effectively combines superior sound reproduction  with simplified - not complicated - operation. That's the real beauty of the 3404. that's why the controls are outside of the dust cover where they're easily accessible.
And that's why just a light touch of the Start button does everything. It determines if a record is on the platter, and if so, quickly sets the correct speed and lowers the stylus to the record.
Slam. Pound the shelf next to the 3404. not a skip, not a jump; thanks to the rock-steady patendted suspension system. Audible acoustic feedback disappears as a result.
A low inertia tonearm with a knife-edge bearing system eliminates audible distortion.
The Bang & Olufsen MMC cartridge works in flawless harmony with the tonearm. The unique self-correcting electronic servo-drive is so precise that the need for a conventional strobe device is eliminated.
 the Beogram 3404 even responds to remote control commands when used with the beomaster 2400 receiver.
Speeds:  33-1/3 and 45 rpm
Speed Control range:  better than ±3%
Wow and Flutter:  less than ±0.06%
Rumble Weighted:  better than 65 dB
Rumble Unweighted Better than 45 dB
Drive System:  Flat belt
Motor:  Servo controlled DC
Pick-up Section MMC20E
Recommended Tracking Force:  15 mN/1,5g
Frequency Range:  20 -20,000 Hz ±2,5 dB
Channel Separation: better than 20 dB (1000 Hz)
Channel Difference:  less than 2 dB
Stylus:  Elliptical diamond
ETM: 0,5 mg
Radius of Curvature:  5 x 17 µm
Compliance:  20 µm/mN
Sensitivity:  better than 0,6 mV/47 k Ω
Output (5 cm lateral RMS):  better than 2,12 mV/47 k Ω
Power Supply: 110 or 220 V  50/60 Hz
Power Consumption:  8 W
Dimensions (WxHxD):  440 x 85 x 370 mm
Weight:  6,5 kg

Kenwood KR-6200 Receiver

FM/AM Stereo Receiver - a new masterpiece of stereo efficiency to carry on the Kenwood tradition of quality.

Kenwood unveils a deluxe new stereo receiver; the KR-6200 with sophisticated new circuitry for wide band response, low distortion, new NPN and PnP transistors for low-noise performance; new dual-protection circuit to prevent damage from power overload, excellent FM reception with exceptional sensitivity, selectivity and capture ratio, and a host of convenience features, including 2-system tape monitor, special midrange tone control, and linear FM dial scale

KR-6200 Features:
Frequency Linear Variable Capacitor - The dial scale has linear graduations (arranged at the same intervals) to make tuning easier
Front-end with 2 FET Circuits - The front-end contains FET circuits together with one dual gate element. These circuits assure high sensitivity, worthy of the name Kenwood.
1 IC and 3 Element mechanical Filter - The 3 element mechanical filter is employed in the IF stage. It improves the characteristics of capture ratio and selectivity
Independent AM and FM circuits for the IF Stage - The FM circuit for the IF stage is separated from the AM circuit. Such a scheme is effective in the reduction of mutual interference

Newly Developed DSD Circuit and MPX Circuit
The double switching system and the carrier leak block filter have been adopted. They are a great aid in improving the de-emphasis frequency characteristic and especially improvement of stereo separation.
Large Meters with Built-in Lighting mechanisms - The KR-6200 has two large-scale meters for tuning convenience
Protected Semi-Complementary Direct-Coupled Power Amplifier - The power amplifier is a protected semi-complementary direct coupled type which assures stabilized high performance
Equalizer Circuit with PNP can Type Transistor - This circuit  employs a PNP can type transistor for the improvement of s/n ratio and circuit reliability.

Amplifier Section
Dynamic Power Output (IHF):
240 watts both channel  at 4 Ω 91 kHz)
190 watts both channel  at 8 Ω (1 kHz)
Continuous Power Output:
80/80 watts each channel at 4 Ω (1 kHz)
60/60 watts each channel at 8 Ω (1 kHz)
60/60 watts both channel at 4 Ω (1 kHz)
50/50 watts both channel at 8 Ω (1 kHz)
45/45 watts both channel at 8 Ω from 20 - 20,000 Hz
Total Harmonic Distortion (at rated): 0,5%
Total Harmonic Distortion (at -3 dB rated):  0,1%
Intermodulation Distortion (at rated):  0,5%
Intermodulation Distortion (at -3 dB rated):  0,2%
Frequency response:
High Level Input :  20 - 40, 000 Hz ±2 dB
Power Bandwidth (IHF):  13 - 30,000 Hz
Input Sensitivty/Impedance:
Phono:  2,5 mV/ 50 k Ω
Mic :  3 mV/ 50 k Ω
Aux 1 and 2 :  180 mV/50 k Ω
Tape Play A and B :  180 mV/ 50 k Ω
Recording Output:
Tape Rec A and B :  180 mV
DIN :  36 mV
Damping Factor (at 8 Ω):  50
Huma nad Noise:
Phono :  65 dB
Mic :  55 dB
Aux 1 and 2 :  75 dB
Tape Play 1 and 2 :  75 dB
Speaker Impedance:  4 - 16 Ω
Tone Control:
Bass :  ±12 dB at 100 Hz
Mid :  ±8 dB at 1 kHz
Treble :  ±12 dB at 10 kHz
Low :  -7 dB at 100 Hz
High :  -10 dB at 10 kHz
Loudness Control 9-30 dB):  +10 dB at 100 Hz;  +5 dB at 10 kHz
FM Tuner Section
Antenna Impedance:  300 Ω, 75  Ω
Usable Sensitivity (IHF):  1,7 µV
Harmonic Distortion (at 400 Hz, 100% mod.):
Mono :  0,5%
Stereo :  0,6%
Signal-to-Noise Ratio:  66 dB
Capture Ratio:  1,5 dB
Selectivity (IHF):  65 dB
Image rejection:  80 dB
IF Rejection:  100 dB
Spurious Signal Rejection: 100 dB
AM Suppression:  70 dB
Stereo Separation:  40 dB at 1 kHz;  25 dB at 10 kHz
Sub Carrier Suppression:  60 dB
Muting level:  10 µV
Quieting Slope:  52 dB at 5 µV;  59 dB at 10 µV;  66 dB at 50 µV
Frequency Response:  20 - 15,000 Hz  +0,5 dB, -2 dB
Front End:  2 FETs (1 DG), 4 Gang
IF Stage:  1 IC, 3 element mechanical filters
AM Tuner Section
Antenna:  Built-in ferrite bar antenna and external antenna terminal
Usable Sensitivity (IHF):  15 µV
Signal-to-Noise Ratio:  45 dB
Selectivity (IHF):  35 dB
Image Rejection:  70 dB
IF rejection:  70 dB
Front End:  3 Gang
IF Stage:  2 stages
Semiconductors:  2 FETs,  1 ICs,  54 Transistors,  45 Diodes
Power Requirement:  110, 120, 220, 240 V 50/60 Hz
Power Consumption:  320 at full power
Dimensions (W x H x D):  17-1/8" x 5-3/4" x 14"
Weight:  29 lbs
Included:  Walnut cabinet

B&O Beomaster 1900

 The Beomaster 1900 Receiver
The dramatic center of the Beosystem 1900 is the Beomaster 1900 receiver. Its operation borders on magical, its performance is without audible flaw,,its aesthetics are beyond reproach. It is a component which has truly domesticated high fidelity.
All major functions of the 1900 receiver are controlled by touch-sensitive electronic switches: the sculpted depressions aligned along the top panel. They are volume, input selection, selection of up to five user pre-set FM stations, and standby. These controls function electronically, completely eliminating mechanical linkages which can wear out or become misaligned (estimated to cause approximately 80% of service problems).
 When any of the electronic controls are touched, a lighted indicator immediately appears directly above. You always know the operational status of the 1900, even from across the room.
 The 1900 also allows you to pre-set up to five FM stations for instant, electronically accurate recall. Four separate tuning indicators and the main random tuning dial are located under the aluminum lid. By tuning the four indicators to those stations you listen to most frequently, they may be recalled by simply touching their respective control on the front panel. The main tuning dial can also be set at a preferred station and this station immediately recalled by a control on the front panel. Random tuning is accomplished by a flush-set tuning control moved effortlessly by a single finger. Also, positioned under the aluminum cover is the AFC which, when in effect, eliminates drift from the stations you select.
Also found under the aluminum lid are the controls for adjusting bass, treble, and balance between your speakers. These controls are smooth sliding potentiometers. Easily viewed, illuminated indicators are used to show visually the extent to which the controls have been moved from their neutral position.
 The Beomaster 1900 receiver has a split power supply which provides optimum performance throughout the frequency range. All output transistors are usd conservatively and an electronic protection circuit automatically respondes to any overload, breaking the circuit and preventing any damage from occuring to receiver or speakers. The tuner section of the 1900 utilizes FETs for high sensitivity and selectivity,PLL circuitry is used to guarantee excellent channel separation and greater long term circuit stability. Ceramic filters and integrated circuits in the IF amplifier and stereo decoder provide excellent separation and low harmonic distortion.

Amplifier Section
Power Output (1000 Hz RMS):  2 x 30 W at 4 Ω; 2 x 20 W at 8 Ω
Music Power :  2 x 50 W at 4 Ω ; 2 x 30 W at 8 Ω
Speaker Impedance:  4 Ω
Harmonic Distortion:
1000 Hz, 50  mW :  less than 0,07%
DIN 45 500, 40 - 12,500 Hz :  less than 0,13%
Intermodulation DIN 45 500 :  less than 0,15%
Frequency Range (±1,5 dB DIN 45 500):  20 - 40,000 Hz
Power Bandwidth (1% distortion):  10 - 40,000 Hz
Damping Factor (1000 Hz):  better than 70
Input Sensitivity/Impedance:
Pick-up:  3 mV/47 k Ω
Tape:  220 mV/ 470 k Ω
Signal-to-Noise Ratio (DIN 45 500):
Pick-up (50 mW) :  better than 60 dB
Tape recorder (50 mW):  better than 65 dB
Channel Separation
1000 Hz (DIN 45 500):  better than 56 dB
250 - 10,000 Hz :  better than 38 dB
Output Level:
Tape Recorder (1000 Hz DIN 45 500):  100 mV/100 k Ω
Headphones :  max, 6 V/200 Ω
Bass Control at 40 Hz :  ±18 dB
Treble Control at 12,500 Hz :  ±15 dB
Tuner Section
FM Range:  87,5 - 108 MHz
Sensitivty [stereo 46 dB]:  less than 30 µV/75 Ω
Signal-to-Noise Ratio  [stereo, weighted]:  better than 60 dB
Frequency Range (DIN 45 500, ±1,5 dB):  20 - 15,000 Hz
Harmonic Distortion (DIN 45 500):  less than 0,4%
Stereo Channel Separation (1000 Hz):  better than 35 dB
Pilot Suppresion
At 19 kHz:  better than 45 dB
At 38 kHz :  better than 50 dB
General Section
Power Supply:  110 - 130 - 220 - 240 V; 50/60 Hz
Power Consumption:  25 - 185 W
Dimensions (W x H x D):  620 x 60 x 250 mm
Weight:  7,6 kg

Rotel RP 845 Turntable

Following the fabulous and highly acclaimed RP850 and RP830 turntables, Rotel proudly present the newest turntable with the same outstanding ability to deliver sheer musical performance  at a realistic price. A high standard finished wood cabinet supported by a heavy metal bottom chassis, a tonearm stem fixed independently on a thick  center metal plate, a close-tolerance smooth center spindle, specially designed highly effective insulator feet, a super damped Norsorex mat, the heavy aluminum diecast platter, an attractive smoked dust cover with the insulated hinges etc. Plus a high quality, high rigid tonearm with special radial bearings for both horizontal and vertical planes. An end result is the usual Rotel's outrageously musical enjoyment. Naturally, perfectly compatible with all the other Rotel  high performance components.

Motor:  4-pole hysteresis synchronous motor
Drive:  belt-drive system
Speeds:  33-1/3 and 45  pm
Tonearm System:  Static balanced straight pipe arm, direct readout stylus gaude, anti-skate control
Wow and Flutter:  less than 0,04%
Signal-to-Noise Ratio:  70 dB (DIN-B)
Dimensions (W x H x D):  430 x 140 x 360 mm
Weight:  7,4 kg

H.H. Scott PS87A Turntable

PS87A Fully-Automatic Direct-Drive Turntable with Srobe
The Scott PS87A boasts an unmatched combination of the most wanted features. And, at a suprisingly affordable price. Automatic start, reject, return and shut-off plus single play or repeat functions provide the ultimate in convenience.
Featured strobe light with adjustable speed controls (±3%)
Viscous damped arm lifter with cueing lever
Direct readout stylus pressure and anti-skating controls
Record size selector
Spare handshell receptacle 12" finished diecast platter with strobe pattern
Low-capacitance phono cables and hinged dust cover
Unipivot suspension statically-balanced "S" shaped tonearm minimizes tracking error

Type:  Direct-drive full automatic
Motor:  electronically controlled DC motor
Turntable Platter:  12-inch (300 mm), aluminium diecast
Drive System:  Direct drive
Speedas :  33-1/3 and 45 rpm
Pitch Control Range:  ±3%
Wow and Flutter:  0,03%
Signal-to-Noise Ratio:  60 dB
Tonearm: 210 mm, static balanced, adjustable weight and anti-skating
Stylus pressure Range:  1 - 3 grams
Antiskating Range:  0 - 4 grams
Power Requirements:  AC 220V, 50 Hz; AC 120 V, 60 Hz
Power Consumption:  11 watts
Dimensions (W x H x D):  448 x 150 x 354 mm (17-2/3" x 5-3/4" x 13-5/6")
Weight [net]:  7,8 kg (17 lbs)

JVC RX-503 Receiver

Receiver System Control Center with AV remote control and computer-controlled S.E.A. graphic equalizer
CSRP improved, with factory-preset values added to the comprehensive display facility; the user can see the settings and use it more easily.
With this, the optimum values of the settings of volume, balance, loudness, SEA, surround, etc, for each source can be stored in memory and recalled immediately while the settings will be shown on the FL display in sequence, whenever the corresponding source is selected. As factory-preset values for each source are stored in the memories of these receivers, these can be recalled when the receivers are switched on for the first time. Therefore, these values can be used as they are as well as modified to the user's preference. In addition, as the remote control units provided with most receivers incorporate a convenient CSRP display, you can check the values and perform adjustment without leaving your listening position.

CCS - COMPU Link Communication System Interactive.
This CCS system gives further interactive information to the JVC-exclusive COMPU LINK system, by indicating the current source or operation mode you've commanded,, or volume up/down, even the station name and SEA pattern recalled.

Five programmed and five user preset equalization patterns
The graphic equalizer not only allows the user to create five custom equalization  patterns and store them in memory for later recall but also lets the user call up one of five pre-programmed equalization patterns; heavy, Clear, Soft, Movie and Vocal.

SEA equalization pattern name memory/indication
Together with the five user-programmable equalizer patterns, top-end receivers have a pattern name input, and display capability. In the same way as that for station names, up to five or  four  (RX-503) characters or numerals can be stored in memory.

40 FM/AM random station preset memory
All JVC receivers include a computer-controlled digital synthesizer tuner featuring preset memory of up to 40 broadcast stations for FM and AM randomly.
This feature lets the user to preset almost any FM or AM station to be listened to, for immediate pushbutton recall.

Other Features on JVC receivers
Station name memory with alphanumeric display
Auto memory functions
Preset scan function
Sound selector

Amplifier Section
Output Power (2-channel operation):  2 x 80 watts RMS (8 Ω, 20 Hz - 20khz, 0,03% T.H.D.)
Intermodulation Distortion:  0,03% at 80 watts
Input Sensitivity/Impedance:
Phono :  2,5 mV/47 k Ω
Tape 1 Play :  200 mV/47 k Ω
Tape 2, CD, Video :  200 mV/47 k Ω
Recording Output level:  200 mV
Frequency response:
Phono (RIAA eq.) :  20 Hz - 20 kHz ±0,5   dB
Tape 1 Play :  10 Hz - 50 kHz ±1 dB
Tape 2, CD, Video :  10 Hz - 50 kHz ±1 dB
Signal-to-Noise ratio:
Phono :  71 dB ('66 IHF); 78 ('78 IHF, Rec Out)
Tape 1 Play :  91 dB ('66 IHF); 85 dB ('78 dB)
Tape 2, CD, Video :  91 dB ('66 IHF); 85 dB ('78 dB)
S.E.A. Section
Center Frequencies:  63 Hz. 160 Hz, 400 Hz, 1 kHz;  2 ,5 kHz;  6,3 kHz; 16 khz
Control range:  ±10 dB
FM Tuner Section (IHF)
Tuning Range:  87,5 MHz - 108 MHz
Usable Sensitivity [mono]:  10,8 dBf (0,95 µV/ 75 Ω)
50 dB Quieting Sensitivity :
Mono :  16,3 dBf  (1,8 µV /75 Ω) 
Stereo :  38,3 dBf (22,5 µV/75 Ω)
Signal-to-Noise Ratio (IHF-A net, 85 dBf):
Mono :  80 dB
Stereo :  73 dB
Total Harmonic Distortion (1 kHz):
Mono :  0,15%
Stereo :  0,2%
Frequency Respponse:  30 Hz - 15 kHz ; +0,5 dB -3 dB
Capture ratio (85 dBf):  1,5 dB
Alternate Channel Selectivity:  60 dB (±400 kHz)
IF Response Ratio:  85 dB (at 98 MHz)
Stereo Separation:  40 dB (at 1 kHz)
AM Tuner Section
Tuning Range:  530 kHz - 1710 kHz
Sensitivity:  30 µV (external); 300 µV /m (loop antenna)
Signal-to-Noise ratio:  50 dB (100 mV/m)
Selectivity:  25 dB (±10 kHz)
Image response Ratio:  40 dB
IF Response Ratio:  60 dB
Total Harmonic Distortion:  0,5% (100 mV/m)
Requirements :  AC 120 V or 230 V 50/60 Hz
Consumption :  290 watts, 380 VA
Dimensions (W x H x D):  435 x 125 x 330 mm (17-3/16" x 4-15/16" x 13")
Weight:  8 kg (17,7 lbs)
Remote Control :  RM-SR503U

Pioneer SG-9500 Equalizer

Unique Stereo Graphic Equalizer Pioneer SG-9500 for impeccable tonal control of any frequency response and sound field

Pioneer has created model SG-9500 so that you, the music listener,, can create the most ideal sound field by more delicately  and accurately controlling frequency response. Distinctively designed and finished, the SG-9500 work to complement the sound personalities of your stereo cartridge, microphone, tape equipment and speakers. In the broadest sense, the SG-9500 actually "hand-tailors" your music and its myriad tonal qualities to enhance your music-listening pleasure. The stere perfectionist. And we hope this is you. Could hardly ask for a more precise, more complete instrument to add the perfect finishing touches to his musical sound field.
Level Control with One Octave Cutoff, independent left and Right channels
The level control is cut off by one octave in 10 elements of 32 Hz, 64 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz, and 16 kHz, and the left channel and right channel can be operated independently. The variable range of each element is ±10 dB

IC operation Amplifier
Unlike any other graphic equalizer, SG-9500 uses an Integrated Circuit instead of ordinary cils and capacitors. The IC contains 20 transistors and 2 diodes (x10 elements) and each IC operates as an active bandpass filter by negative feedback technology. This helps minimize distortion and contributes to expansion of dynamic range.

Multiple Reproduction and recording Techniques
By  combining the Tape Monitor Switch and Equalizer Switch , six different recording and reproducing methods can be accomplished without connecting or disconnecting the cords of the SG-9500. with the Equalizer SW switched off, the Equalizer  circuit is baypassed. Refeence to the wiring diagram reproduced on the unit's rear panel, adds to the convenient reproduction and recording possibilities of the SG-9500.

Pure FET-Equipped Electronic type Muting
A pure electronic type control muting circuit is employed in the SG-9500 with an FET in the output stage in series. This eliminates pop noises when power is switched on and off.

Professional. Distinctive Design
The SG-9500 is a beautifully designed instrument that will make a handsome addition to any existing stereo system. Its immaculate to efficient operation.
Equalizer range :  ±10 dB
Individual Channel Adjust:  32 Hz, 64 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz, and 16 kHz,
Total Harmonic Distortion (20 Hz to 20 kHz , all control Flat):
Output 1 V :  0,04%
1 kHz, all Control Max. Output 3 V :  0,04%
1 kHz, all Control Flat, output 2 V :  0,03%
1 kHz, all Control Min. Output 1 V :  0,05%
Insertion Loss:  0 dB (control flat)
Max Output Voltage:  6 V (1 kHz, T.H.D. 0,05% , RL 47 k Ω)}
Frequency Response:  5 Hz to 70 kHz =0 dB, -1 dB
Signal-to-Noise ratio:  90 dB (IHF, Short circuited, A network, 2 V output):
Input Impedance:  600 ohms
ICs :  14; FETs :  2; Transistors : 12 ; Diodes :  13
Requirement :  120, 230 V 50/60 Hz
Consumption :  16 watts
Dimensions (W x H x D):  420 x 150 x 341 mm (16-1/2" x 5-7/8" x 13-7/16")
Weight:  6,9 kg (15 lb 3 oz) net

NAD 1300 pre-amplifier

The 1300 was designed for the technically sophisticated audiophile who requires both state-of-the-art. sound and a high degree of operating flexibility
For listeners who are committed to the LP as an important source of music, the 1300 contains a highdefinition FET-input phono preamplifier with excellent sound-stage imaging and astonishing resolution of inner detail. No trace of slew-limiting or transient distortion can be found, even in high-level signal peaks 25 dB above normal level. Selectable input capacitance and precise RIAA equalisation ensure that the sound of each recording is accurately preserved

Using eight selected low-noise transistors per channel, this MM phono circuit provides unusually effective rejection of radio-frequency Interference from nearby digital circuits, cordless phones, and radio/TV transmitters. It is supplemented by an elegantly simple class-A preamplifier that provides quieter play-back with low-output moving-cod pick-ups than most preamps provide with a high-output MM cartridge
In addition to the features described on the preceding pages, the 1300 includes a special “Null” circuit that electronically subtracts any monaural information from the audio signal. Using this feature, you can easily align your cartridge for perfect electrical balance or adjust your FM antenna for minimum multipath distortion
With its bi-directional taping circuits and a separate EPL circuit for an external processor, the 1300 offers unmatched flexibility. All of its line-level circuits, including its unique volume and tone controls, have the high headroom and ultra-low noise required to accommodate both today’s and tomorrow’s digital sources. The dynamic range of the 1300, relative to the 2-volt maximum output of a CD player, exceeds 110 dB. But the most important characteristic of this preamp is the simplicity and sonic purity of its  primary signal path. Yet its price is surprisingly low in comparison with other preamps that don’t soundas good and give you less control.

Pre-Amp Section
Phono input
Input Impedance (R and C)
MM : 47k Ω / 200 pF
MC : 100 Ω / 1000 pF
Input Sensitivity, 1 kHz
MM :  1,3 mV ref. 0,5 V
MC :  60 μV ref.  0,5 V
Input Overload at 20Hz / 1kHz / 20kHz
MM :  20 / 200 / 2000 mV
MC  :  1,0 / 10 / 100 mV
Signal[to- Noise ratio (A-weighted with cartridge connected)
MM :  80 dB ref. 5mV
MC :  78 dB ref. 0.5mV
Total Harmonic Distortion (20 Hz - 20 kHz):  less than 0.02%
RIAA Response Accuracy:  ±0,3 dB (20 Hz - 20 kHz)
Line Level Inputs
Input Impedance (R and C):  100 k Ω / 220 pF
Input Sensitivity (ref. 0.5V):  80 mV
Maximum Input Signal:  12 V
Signal-to-Noise Ratio (A-weighted ref 0.5V):  better than 100 dB
Frequency Response:  ±0.3 dB
Line Level Outputs
Output Impedance
Normal :  50 Ω
Tape or EPL :  1 k Ω
High Level :  100 Ω
Phones :  70 Ω
Maximum Output Level
Tape, Normal & EPL :  12 V
High & Headphones:   15 V
Tone Controls
Treble:  ±12 dB at 3, 6, or 12 kHz
Bass :  ±12 dB at 50, 120 or 250 Hz
Bass EQ :  +3 dB at 55 Hz;  +6dB at 36Hz
Infasonic Filter (switchable):  -3 dB at 14 Hz, 18 dB/octave
Remote:  No
NAD Link:  No
General Section
Power Supply/ Consumption: 120  ~ 240 V, 50/60Hz / 20W
Dimensions (W x H x D) : 435 x 84 x 273 mm
Weight :
Net :  4,3 kg
Shipping :  5 kg

NAD 2100

The “best buy” 2100 Power Amp is remarkable even by NAD’s standards.
While its rated power for continuous test tones is 50 watts channel, it’s effective power output for music is an impressive 200 to 330 watts per channel (depending on speaker impedance). Thanks to NAD’s unique Power Envelope circuitry, this high level of tone-burst power is available not just for brief transients but for the full duration of complex chords and musical climaxes.
Yet the 2100 has the same modest size and low price as other “50 watt” amplifiers with 40,000 μ F of power-supply capacitance, the 2100 delivers peak currents as high as 30 amperes to cope with the most complex and reactive loudspeaker impedances. In addition to power and control, the 2100 has delicacy; with a signal-to-noise ratio of 117 dB, it faithfully reproduces every subtle strand of low-level musical detail and back-ground ambience. With its high-speed output stage and ultra-low distortion, the clarity of its sound must he heard to he appreciated.

You can use either wide-hand inputs or filtered inputs 112Hz to 80kHz that strip off interference, prevent intermodulation distortion, and protect your speakers from unwanted subsonic signals The filtered inputs also have input- level controls that match your preamp’s output, balance levels in biamped or surround systems and allow you to bypass your preamp and connect a line level source directly to the power amp. Heavy-duty binding-post terminals provide secure low-resistance connections for all types of speaker wire.
If you need more power, a rear-panel switch combines the amplifier’s two channels to form a mono amp rated at 100 watts continuous and 500 watts tone-burst output. The efficiency and compact size of the 2100 also make it a perfect choice for hi-amplifying speakers. (Suggestion for a high-definition audiophile system: instead of buying exotic and expensive speaker cables to stretch across the room, install a bridged or bi-amped 2100 directly behind each speaker, connected with ultra-short wires.

Power Amp Section
Continuous Output Power (into 8 Ω) : 60 W (17 dBW)
Rated Distortion (THD 20Hz - 20kHz):  0,03%
Clipping Power (maximum continuous power per channel):  70 W
IHF Dynamic Headroom (at 8 Ω):  +6dB
IHF Dynamic Power (maximum short term power per channel)
8 Ω :  200 W (23 dBW)
4 Ω :  250 W (24 dBW)
2 Ω :  330 W (25 dBW)
Damping Factor (ref. 8 Ω, 50 Hz):  better than 100
Input Impedance:  10 kΩ  / 600 pF
Input Sensitivity (for rated power into 8 Ω):  0.85V
Frequency Response:  3 Hz - 100 kHz  +0, -3 dB
Signal-to-Noise Ratio
ref. 1W :  100 dB
ref. rated power :  117 dB
Total Harmonic Distortion  (20Hz - 20kHz): less than 0,03%
Bridged Mode
Continuous Output Power (into 8 Ω) :  100 W (20 dBW)
IHF Dynamic Headroom (at 8 Ω) :  +7 dB
IHF Dynamic Power (maximum short term power per channel)
8 Ω :  500 W (27 dBW)
4 Ω :  660 W (28 dBW)
General Section
Power Supply/Consumption:  120  ~ 240 V, 50/60Hz / 330 VA
Dimensions (W x H x D):  435 x 106 x 385 mm
Net :   9,5 kg
Shipping :  10,9 kg