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

Dual C 939

The more experience you've had with tape decks, the more you're likely to appreciate the Dual C939's performance and versatility. Apply the most demanding musical tests; sustained piano tones for flutter; extreme highs and lowes for frequency response; soft passages for Signal-to-Noise ratio - and you will hear no diference between the original disc and tape made on the 939. all of which brings to life the 939's impressive specifications for wow and flutter (0,05%), Signal-to-Noise (65 dB) and frequency response (20-17,000 Hz). Now we'd like to take you through the 939's astonishing array of design and operating features.
Auto/reverse playback, bi-directional record. The 939 reverses automatically in play-back - a C-90 will play 90 minutes without interruption. There's continuous play too. Recording is bi-directional. When the tape reaches the end, youu just reverse direction.
With any other deck you either live with unwanted sounds on a tape or erase them abruptly - without hearing what you're doing until it's too late.
With the 939's unique fade/edit control you can fade out those annoyances gradually, smoothly and permanently. And then fade back into the music. While listening. Because it's all done during playback.

Drive system and tapeheads like no other.
Dual's powerful Continuous-Pole /synchronous motor,, two capstans and two drive belts maintain speed accuracy within 0,5% . A C-90 cassette fast-winds in lust over a minute, the time other decks need for a C-60. hard permalloy tapeheads are used for their extended life and superior magnetic linearity. The four-track record/playback head switches electronically when the tape changes direction, it never shifts position. The result; perfect tape alignment in both directions at all times.

LED Record-Level Indicators
Meter needles can't move fast enough to keep up with musical signals. Which is why the 939 uses instantaneous reacting LED record-level indicators. And they lilt to the best viewing angle.

The Dual C939 meets or exceeds the requirement of DIN 45 500 for domestic HiFi equipment. The data given base upon the current DIN reference tapes.
Tape Speed:  4,75 cm/s
Deviation from Correct Speed:  less than ±1%
Wow and Flutter:  weighted RMS :  less than ±0,07%
To DIN for reproduction only :  less than ±0,10%
To DIN for recording/reproduction :  less than ±0,10%
Frequency Response (ref-to DIN tolerances)
Fe Standard Tape :  20 -14,000 Hz
CrO₂ Tape :  20 - 16,000 Hz
FeCr Tape :  20 - 17,000 Hz
Distortion K3 at 333 Hz (ref.to 0 dB VU)
Fe Standard Tape :  less than 1,2 %
CrO₂ Tape :  less than 1,8 %
FeCr Tape :  less than 1,0 %
Signal-to-Noise Ratio (weighted)
With Dolby NR
Fe  Tape : better than 63 dB
CrO₂ Tape : better than 63 dB
FeCr Tape : better than 65 dB
Without Dolby NR
Fe Tape :  better than 53 dB
CrO₂ Tape : better than 56 dB
FeCr Tape :  better than 58 dB
Channell Separation at 1000 Hz
Between Stereo Channels :  better than 30 dB
In Oppositie Direction :  better than 60 dB
Erasure at 1000 Hz
Fe Tape :  better than 70 dB
CrO₂ Tape : better than 65 dB
FeCr Tape :  better than 70 dB
Oscillator (push-pull oscillator):  80 Hz
Inputs ( Sensitivity at 0 dB VU)
Microphone :  0,30 mV/10 k hm
DIN Connector :  0,45 mV/4,7 k Ω
RCA Jack :  70 mV/ 82 k Ω
DIN Connector :  0 -700 mV/1,8 k Ω
RCA Jack :  0 - 700 mV/1,8 k Ω
Headphones :  4 - 2000 k Ω adjustable
Fast Winding:  C-60 less than 60 sec.
Complement:  4 Ics; 49 Transistors; 30 Diodes; 1 Darlington photo cell; 28 LED's
Power Requirements:  100 -125 V / 220 - 240 V, 50/60 Hz
Power Consumption:  approx. 35 VA

I like 

Akai GX 260D

The GX 260D means the machine is fitted with Akai's unique Glass and Crystal Ferrite head. This head is completely unique to Akai. The core of the head is  a "single crystal" gem set in pure glass of terrific hardness. Because the gem set in pure glass of terrific hardness. Because the gem is a single crystal, it has no composite particles that can break off and damage he head. (Inn a way, it's rather similar to the jewel action in a watch - except that Akai would be the only watch - maker to use it.)
So, the head remains wear-free for life. In fact, Akai guarantee it. If the GX head on your Akai machine wears out in normal use during the lifetime of the machine, we will repace it without charge.
And in the meantime, the GX head gives you outstanding performance because the head and the tape are kept in perfect contact at all times - even high frequency distortion is very greatly reduced.

The GX 260D has four heads - 2GX recording/ erase heads and 2 GX playback heads. It features automatic or manual revers for both recording  and playback.
It has 3 motors - one self-lubricating hysteresis synchronous capstan drive motor, two eddy-current outer-rotor reel drive motors. The advantage of the centre capstan drive motor is that it ensuress identical performance in both tape directions.
The GX 260D offers you line output  level control. It lets you add echo effect to any recording. And, of course, it has all the facilities for sound-on-sound, sound-with-sound, and microphaone/line mixing.
There's also a yape/Source montor,  a Tape Selector Switch and Automatic  shut-off.

Track System:  4-track, 2-channel stereo/monaural
Reel Capacity:  up to 7" reel
Tape Speed:  7-1/2 and 3-3/4 ips
Wow and Fluter:  less than 0,06% WRMS at 7-1/2 ips; less than 0,1% WRMS at 3-3/4 ips
Frequency Response: 
Low Noise Tape :
30 - 26,000 Hz (±3 dB) at 7-1/2 ips
30 - 20,000 Hz (±3 dB) at 3-3/4 ips
Regular Tape :
30 - 23,000 Hz (±3 dB) at 7-1/2 ips
30 - 18,000 Hz (±3 dB) at 3-3/4 ips
Distortion:  less than 1,2% (1,000 Hz, 0 VU)
Signal-to-Noise Ratio:
Activated Tape Selector Circuit :  Better than 57 dB
Inactivated tape Selector Circuit :  Better than 54 dB
Erase Ratio Cross-Talk:
Mono :  better than 60 dB
Stereo :  better than 45 dB
Bias Frequency:  100 kHz
Heads:  two GX recording/erase combination heads, two GX playback heads
One :   4/8-pole self-lubricating hysteresis synchronuous capstan drive motor;
Two :  Eddy-current outer-rotor reel drive motors
Fast Forward / Rewind Time:  75 sec using 1200 ft tape
Output Jacks:
Two Line :  1,23 V, 0 VU/100 Ω (required load impedance more than 20 k Ω)
One Phono :  30 mV/ 8 Ω
Input Jacks:
Two Line :  50 mV
Two Microphone :  0,3 mV/4,7 k Ω
DIN Jack:  0,5 V/25 mV
Power Requirements:  100 V to 240 V AC, 50/60 Hz
Dimensions (W x H x D):  17,5 " x 18,6" x 8,9"
Weight:  45,8 lbs

A&R Cambridge T21

The T21 Stereo FM Tuner
The qualities of the A60 amplifier series demand a tuner that is a complete partner. The T21 is that partner, an ideal match in looks, performance and price.

Great care has been taken in the design of the sound circuitry of the T21 to produce an unusually flat frequency response over the critical listening bandwidth. A "birdie" filter, fitted before the stereo decoder, considerably reduces the unpleasant whistles ("birdies") caused by closely positioned stereo broadcasts it also compensates for phase errors in previous stages which would otherwise add to distortion and crosstalk. A highly efficient ,ultiplex filter removes the 19 and 38 kHz high frequency tones produced by the stereo decoder circuitry, preventing damage to loudspeakers and interference with the bias oscillator in a tape recorder.

Overall, our design and production standards have been carefully maintained with the T21 tuner. We beliwve it is the perfect complement to our range of high performance, value-for-money sound equipment.
T21 also included in the tuning window is a single red LED as a stereo beacon. Tuning can be carried out by either the manuall tuning control or one of the five preset push buttons. Full station search with continuously variable tuning is provided by the rotary knob which has a pleasant and useful flywheel action. For the more frequently used stations each of the five buttons can be individually preset with the controls at the rear of the tuner. A mute facility is provided to remove background noise between the stations. To ensure that a station, once selected, remains accuraattely tuned in, an AFC (automatic frequency control) is fitted.

The  T21 can be used with any amplifier including of course, the A60 itself. A level controll knob on the rear of the tuner allows unwelcome variation in the output volume between the tuner and, say, a record deck to be equalised. Thus only minimal adjustment of the amplifier's volume control is ever needed. Both 75 Ω and 300 Ω balanced serial sockets are provided together with tuner matching plugs, allowing easy connection to all standard FM aerial systems.

Tuning Scale:  21 matched red LEDs in steps of 1 MHz, a gradual changeover in light intensity between adjacent LEDs allows frequency readings of typically 0,2 MHz to be achieved.
Tuning Range:  87,5 - 108,5 MHz
Signal Strength Meter:  bargraph scale using 5 LEDs, 2 red and 3 green
Tuning Meter:  3 LEDs, red-green-red
Stereo beacon:  single red LED
Aerial Inputs:
Socket for 75 Ω and 300 Ω antenna
Sensitivity (IHF):  1,3 µV
-3 dB Limiting Point :  10 µV
Capture Ratio:  1,5 dB
Alternate Channel Selectivity:  better than 60 dB
Repeat Spot Suppression:  better thann 80 dB
IF Rejection:  better than 80 dB
AM Suppression:  better than 50 dB 
(ref. 75 kHz deviation, 30% AM at 400 Hz, aerial signal  10 µV-10 mV)
Signal-to-Noise Ratio (CCIR/ARM weighted):
Mono :  better than 70 dB
Stereo :  better than 68 dB
Pilot Tone Suppression :  better than -50 dB
Subcarrier Suppression:  better than -40 dB
Total Harmonic Distortion (1 kHz):
Mono :  better than 0,15% (typically 0,08%)
Stereo :  better than 0,25% (typically 0,15%)
Channel Separation:  better than 40 dBf
Frequency Response:  20 Hz - 12 kHz  ±0,5 dB ( typically -3 dB at 15 kHz)
Channel balance:  within ±1 dB
Output Level:  continously variable 10 mV- 1 V at full deviation
Output Impedance:  less than 1 k Ω
Recommended Load:  better than 10 k Ω
Power Supply;  200 - 250 V  AC, 6 VA maximum; (or  100 - 120 V AC)
Deimensions (W x H x D):  450 x 60 x 240 mm (17-3/4" x 2-3/8" x 9-1/2")
Weight (net):  3,3 kg (7,3 lb)

TEAC A-X5030

Integrated Stereo Amplifier A-X5030
High-power drive capability
Switchable subsonic filter
-20 dB muting switch
Loudness compensation switch
Center-detented bass and treble tone controls
Balance control
Dual speaker terminals and independent speaker A/B switches
Heavy-duty binding-post speaker terminals
Large insulator feet.

Another example of TEAC dedication to delivering the finest possible quality in these amplifiers is the fact that each unit is individually calibrated for optimum performance.
In the A-X series amplifiers, the output stage idling current is determined by a precision trimmer rather than the usual fixed resistor. This is adjusted to provide optimum idling current - and therefore an absolute minimum of crossover distortion - during the final testing and inspection stage. You can rest assured that the amplifier you receive is fine-tuned to deliver super sound quality.
All-Mechanical Short-Path Signal Switching
Many modern amplifiers use semiconductor switches to control signal routing. These like any other electronic part, can degrade signal quality. TEAC has used only top-quality mechanical switches ensuring reliable, distortion-free signal routing. Furthermore, switches handling low level signals are positioned as close as possible to the corresponding rear-panel terminals to minimize the signal path length and are remotely controlled via the panel knobs. This means that noise and interference pickup is minimized for extra signal purity.
 Source Direct Switch
When you want an extra margin of signal purity, the Source Direct switch can be engaged to bypass the tone, balance, loudness controls, muting and subsonic filter controls, giving you the shortest, most direct signal path possible for all input sources.
Versatile Input and recording Capability
Independent input and Rec selectors let you monitor one source while simultaneously recording another. The Rec selector also offers tape-to-tape recording capability. The A-X5030 accept of 6 base input sources like; phono, tuner, CD, tape 1/DAT, tape 2, AUX, and additionally features Adapter/Tape 3 terminals that can be used to connect a third tape deck or an external adapter such as a graphic equalizer or surround processor. The A-X5030 also features a high-performance internal MC phono cartridge head amplifier and an MM/MC phono selector switch.
Heavy-Duty Binding-Post Speaker Terminals
Since speaker cables can have a significant effect on the sound, the TEAC amplifiers are equipped with heavy-duty binding-post terminals that will easily accept high-quality speaker cables while providing solid reliable contact.

Continuous Power Output (RMS):
At 8  :  75 W + 75 W (20 - 20,000 Hz, 0,02% THD)
At 4  :  100 W + 100 W (20 - 20,000 Hz , 0,04% THD)
DIN Power Output:
At 8  :  85 W + 85 W (1 kHz)
At 4  :  120 W + 120 W (1 kHz)
Dynamic Power Output:
At 8  :  100 W + 100 W
At 4  :  150 W + 150 W
Total Harmonic Distortion (Continuous Rated Output Power):
At 8  :  0,007% (1 kHz)
At 4  :  0,01 % (1 kHz)
Input Sensitivity/Impedance:
Phono (MM) :  2,5 mV/ 47 k Ω
Phono (MC) :  0,25 mV/100 Ω
CD, Tuner, Aux, Tape :  150 mV/30 k Ω
Signal-to-Noise Ratio (IHF--A):
Phono (MM) :  80 dB (5 mV)
Phono (MC) :  67 dB (0,5 mV)
CD, Tuner, Aux, Tape :  101 dB
Frequency Response:
Phono (RIAA) :  20 - 20,000 Hz ±0,5 dB
CD, Tuner, Aux, Tape :  5 - 100,000 Hz -3 dB
Dimensions (wxhxd):  435 x 155 x 354 mm
Weight:  10,5 kg

NAD 6340

Cassette Deck
Dolby HX-Pro and DYNEQ: 
Dyneq varies the record equalization to prevent over saturatio when strong high frequency transients occur. HX PRO varies the bias supplied to the bias supplied to the tape during recording to maintain optimum high frequency at all times, thus making a much more accurate reproduction of your source. Note:  HX-pro and DYNEQ are compatible for playback with all cassette decks, including car decks.
Car Circuit: 
Boosts quiet passages in the music without altering the loud passages, making a more practical tape for car or portable players. It also adds equalization for the car environment.
Play Trim:
Developed by Dolby laboratories with NAD, Play Trim compensates for high frequency loss before Dolby NR, restoring highs withput increasing noise. Example: Take an old tape with dulled highs and turn the Play Trim knob and note the restored highs.
Dolby B & C
Full Logic Transport

Speed Accuracy:  +1%
Wow and Flutter: 
less than 0,06% JIS wtd RMS
less than 0,1% DIN wtd. Peak
Frequency Response:  30 Hz - 19 kHz +3 dB (MPX filter Off)
MPX Filter Response:  flat within 1 dB to 15 kHz
Harmonic Distortion:  varies with recording level typically less than 0,3% at -10 dB
Total Harmonic Distortion at 0 dB:
Normal Tape :  less than 1,0 %
CrO₂, Metal Tape :  less than 1,5%
Signal-to-Noise Ratio (ref.3% T.H.D. at 333 Hz CC1R/ARM weighting):  57 dB
Dolby off :  75 dB
Dolby B :  67 dB
Dolby C :  77 dB
Channel Separation:  45 dB at 1 kHz (38 dB broadband)
Erasure:  better than 70 dB at 1 kHz
Input Sensitivity /Impedance:  40 mV/10 k Ω
Maximum Input level:  25 V
Output Level at 0 dB:  500 mV
Output Impedance:  1000 Ω
Power Requirement:  120, 220, 240 V AC 50/60 Hz
Power Consumption:  22 W at 120 V AC
Dimensions (W x H x D):  420 x 122 x 270 mm (16,5" x 4,8" x 10,6")
Weight (net):  4,5 kg (9 lb 15 oz)

NAD 5420

 Compact Disc Player
Balanced MASH One-Bit High Resolution Digital to Analogue Converter:
With CD players utilizing MASH or other one bit technologies, our engineers have found that what really makes the difference in their performance is the care taken in power supply design,, PCB layout, grouding, and selection of analog circuit components
Circuit Simplicity:
Many CD players are "over-designed" with unnecessary stages of analog circuitry that sacrifice transparency and subtle detail. NAD players have just three wide-band analog circuits and only one coupling capacitor in the signal path (bypassed by a low loss film capacitor), thus preserving the emotional detail of the original performance.
Other Features:
Plays 3-inch disc without adaptor
16 tracks programmable
Disc Capacity:  Single disc 120 or 80 mm
Programming Capacity:  16 tracks
D/A Conversion:  MASH, 18-bit resolution 32 times oversampled , linear phase with 18 bit coefficients
Analogue Filter:  5 pole active
Frequency Response:  5 Hz - 20 kHz ( 0/-0,5 dB)
De-emphasis Error:  less than +0,3 dB
Total Harmonic Distortion 0,0025% (at 0 dB , 1 kHz)
Dynamic Range:  98 dB
Linearity:  +0,5 dB; 0 to -90 dB
Signal-to-Noise Ratio (A-weighted, measured with all zeroes test disc):  106 dB
Channel Separation: (1 kHz) :  100 dB
Wow and Flutter:  Unmeasurable (quartz accuracy)
Output Impedance:  120 Ω
Output Level at 0 dB:  2,0 V RMS
Digital Error Correction:  CIRC with double error correction in C1 and C2
Noise at Zero Volume:  less than -120 dB
Power Requirements:  120, 220, 240 V AC 50/60 Hz
Power Consumption:  25 W at 120 V AC
Dimensions (W x H x D):  420 x 84 x 260 mm (16,5" x 3,3" x 10,2")
Weight (Net):  4,1 kg (9 lb 1 oz)

NAD 7020i

7020i Stereo Receiver Features:
 Conservatively rated at 20 W/channel continuous power, with +3 dB of IHF Dynamic Headroom.
Dynamic power exceeds 40 W/channel at 8 or 4 ohms, 50 W/ channel at 2 ohms.
 High-current output stage delivers peak currents up to 15 amperes, for precise control of voice-coilmotion with speaker impedances as low as 2 ohms.
 Gold-plated phono input jacks for a long life of corrosion-free contact in this sensitive low level signal path.
 Heavy duty speaker binding-post connections provide a secure, low resistance connection for allspeaker wires and banana plugs.
 Flexibility: the 7020i's pre and power amplifier are connected by external jumpers which are removable to allow for greater flexibility to upgrade your system.
 Sensitive precise digital tuning with three stages of I.F. filtering for outstanding freedom from noise and interference

The modest cost and simple controls of the NAD 7020i Stereo Receiver make it an ideal choice for theperson who wants fine musical reproduction without becoming involved in the technicalities of hi-fi. NAD's approach to audio design can be characterised in one phrase: "high-value engineering".  When you choose an NAD receiver, you are investing in quality behind the front panel . innovative circuit design, selected parts, high-current transistors, exacting quality control, and solid construction for consistent performance and long-term reliability. The rated "continuous" power of a receiver tells you how well it plays sine-wave test tones; but real musical waveforms are much more complex and dynamic.  The NAD 7020i is conservatively rated at 20 watts per channel for test tones, but its high-voltage design produces extra power for rapidly changing waveforms - over 40 watts per channel of dynamic power for the exciting peaks and climaxes in music (especially in digital Compact Discs). Many FM receivers look good on paper; but in side-by-side comparisons, NAD receivers often pull  inweak or difficult stations with audibly better freedom from noise and interference, thanks to sensitive dual-gate MOSFET amplification and sophisticated multi-stage I.F. filtering

Circuit Features High-Current Output Stage
NAD was the first manufacturer to emphasise the importance of output current capacity. The 7020i candeliver peak currents as high as 15 amperes. The "20-watt" 7020i employs the same high-speed output transistors that other manufacturers use in their "50-watt" receivers.
Impedance Selector
NAD's unique Speaker Impedance selector and high-current output stage deliver maximum power to loudspeakers of any impedance - high or low, simple or complex. The 7020i will even drive a 2 Ω impedance safely, without current-limiting or distortion.
Soft Clipping™
When the 7020i is overdriven beyond its power capacity, the exclusive NAD Soft Clipping™ circuit gently limits the waveform voltage so that the output transistors are never driven into saturation, i.e. into"hard clipping". Thus the receiver can safely be over driven substantially beyond its rated power on peaks, yet still continue to sound smooth and musical.
Digital-ready Dynamic Range
The 7020i's over-load- proof inputs for video, tape and digital Compact Disc  can accommodate a dynamic range greater than 100 dB. Every circuit in the receiver, including its low-impedance tone-control stage, is designed to minimise background noise  and preserve the clarity of your recordings.

Phono Preamplifier
Unlike many receivers that employ low-cost integrated-circuit (IC) chips for the phono stage, the NAD 7020i employs a refined discrete-transistor phono preamplifier circuit whose signal-to-noise ratio is sogood (75 dB with the phono cartridge connected) that you won't hear any preamp hiss, even when playing the quietest recordings.
Musically Useful Tone Controls
Correctly designed tone controls can be a genuinely helpful aid to enjoyable music listening. In the NAD 7020i, the bass and treble controls do what their names imply: they allow you to vary the strength ofthe bass and the treble. But at moderate boost/cut settings the important midrange from 300 to 1500 Hz remains essentially flat.
Sensitive Digital Tuning
The 7020i employs precise frequency-synthesis digital tuning; each station is tuned with crystal-controlled accuracy. A dual-gate MOSFET FM circuit pulls in weak stations well but resists overloading on strong signals, Multi-stage I.F. filtering provides an optimum combination of sharp selectivity (to separate closely-spaced stations) and minimum distortion of the stereo signal.
Quiet AM tuning
The AM section is based on an IC that was especially developed for use in digital tuners, It is surprisingly sensitive, unusually resistant to noise, and provides a more extended high-frequency range than in mostother AM tuning circuits.
Phono Input
Input Impedance (R and C):  40 k Ω (100 pF)
Input Sensitivity (1 kHz):  2,4 mV ref. 20 W
Signal-to-Noise Ratio (A-weighted with cartridge connected):  75 dB ref.5 mV
Total Harmonic Distortion  (20 Hz - 20 kHz):  less than 0,04%
RIAA Response Accuracy (20 Hz - 20 kHz):  ±0,5 db
Line Level Inputs
Input Impedance (R and C):  40 k Ω (100pF)
Input Sensitivity (ref. 20W):  150 mV
Maximum Input Signal:  better than 10 V
Signal-to-Noise Ratio (A-weighted ref 1W):  84 dB
Frequency Response :  20 Hz - 20 kHz,  +0,5 dB; -1,0 dB
Infrasonic Filter:  -3 dB at 15 Hz, 24 dB/oct
Line Level Outputs
Maximum Output Level/Output Impedance:
Tape :  10 V / source Z ÷ 1 k Ω
Phones Max. Output Level : 
Better than 10 V into 600 Ω
Better than 500 mV into 8 Ω
Phones Output Impedance:  220 Ω    
Tone Controls
Treble :  ±7 dB at 10 kHz
Bass :  ±10 dB at 50 Hz
Continuous Output Power into 8 Ω:  20 W (13 dB W)
Rated Distortion (THD 20Hz - 20kHz):  0,03%
Clipping Power (maximum continuous power per channel):  25 W
IHF Dynamic Headroom at 8 Ω :  +2,5 dB
IHF Dynamic Power (maximum short term power per channel):
At 8 Ω :  35 W (15,5 dB W)
At 4 Ω :  35 W (15,5 dB W)
At 2 Ω :  50 W (17 dB W)
Damping Factor(ref. 8 , 50 Hz):  better than 30
Input Sensitivity (for rated power into 8  Ω):  900 mV
Input Sensitivity:
Mono -30 dB T.H.D.÷N :  11,3 dBf (2,0 µV/300 Ω)
Mono 30 dB S/N :  15 dBf 93,0 µV/300 Ω)
Stereo 50 dB S/N :  37 dBf (40 µV/300 Ω)
Stereo 60 dB S/N :  47 dBf (120 µV/300 Ω)
Capture Ratio (45 - 65 dBf):  better than 1,5 dB
AM Rejection (45 - 65 dBf):  better than 60 dB
Selectivity (Alternate Channel):  58 dB
Image Rejection:  70 dB  
I F Rejection:  90 dB
Harmonic Distortion [mono/stereo]:  0,1% / 0,1%
Signal-to-Noise Ratio [mono/stereo]:  better  than 80 dB/ better than 74 dB
Frequency Response:  30 Hz - 15 kHz,   ±0.5dB
Channel Separation at 1kHz:  45 dB
Usable Sensitivity:  5 µV
Selectivity:  30 dB
Image Rejection:  45 dB
I F Rejection:  35 dB
Signal-to-Noise Ratio:  45 dB
Harmonic Distortion:  0,5%
Power Supply:  120 ~ 240 V, 50/60 Hz
Power Consumption:  150 W
Dimensions (W x H x D):  420 x 91 x 273 mm
Net /Shipping Weight :  5,5 / 6,8 kg