Revox A 50

Revox A50 Stereo Amplifier

The A50 amplifier is a unit of central importance within a hifi music system. Its power handling capacity is a decisive factor for high quality sound reproduction from tape, disc or off the air. For this reason, extremely careful attention has been given to every design detail of the Revox A50  Stereo Power Amnplifier, whose sine wave rms rating of 2x40 watts will satisfy the most discriminating demands. Silicon transistors are used throughout its circuitry, which is made up of pluggable PC-boards. From the softest sounds up to the rated output power, distortion remains negligible. pre-set level controls eliminate any volume changes when switching between different signal sources. A separate button provides for off tape monbitoring through the power amplifier. Step-type bass and treble controls permit exactly reproducible settings for each channel, as well as a defined Linear response. headphone outputs and switchable filters round up the many distinctive features of the outstanding revox A50 Stero  Power Amplifier.

Specifications:

Continuous Sine Wave Output:  2 x 40 W at 4-8 Ω  ( 2 x 25 W at 16 Ω )

Music Power:  2 x 70 W at 4-8 Ω  (2 x 40 W at 16 Ω )

Distortion:  less than 0,1% at 1 kHz (less than 0,3% from 40 Hz to 15 kHz)

Intermodulation:  less than 0,3%

Frequency Response:  20 Hz - 20 kHz ±1dB

Powertbandwidth:  10 Hz - 40 kHz

Inputs Sensitivity/Impedance:

Micro :  3 mV/100 k Ω

Phono Magnetic :  3 mV (2 - 7 mV) / 47 k Ω

Tape, Tuner :  100 mV (better than 90 mV)/ 100 k Ω

Auxiliary :  100 mV (better than 90 mV)/ 330 k Ω

Phono Ceramic :  230 mV (better than 180 mV)/ 800 k Ω

Tape Monitor :  250 mV (better than 180 mV)/ 50 k Ω

Signal-to-Noise Ratio (unweighted),

At nominal sensitivity reffered to 40 W, 8 Ω load

Phono :  better than 65 dB

Tape, Tuner, Aux :  better than 75 dB

Tape Monitor :  better than 80 dB

At nominal sensitivity reffered to 50 mW, 8 ohm load

Phono :  better than 50 dB

Tape, Tuner, Aux :  better than 50 dB

Tape Monitor :  better than 50 dB

Intrchannel Crosstalk:  better than 60 dB (1 kHz)

Damping Factor:  better than 20

Tone Control (4 dB steps):  ±12 dB at 60 Hz; ±12 dB at 12 kHz

Low Filter :  -8 dB at 60 Hz (12 dB/oct)

High Filter :  -15 dB at 12 kHz (12 dB/oct)

Loudness Control:  60 Hz : -5 dB/1 kHz: -16 dB / 12 kHz : -12 dB

Phono Equalization (RIAA):  ±1 db / 50 Hz ... 15 kHz

Power Supply:  110,130, 150, 220, 240, 250 V 50/60 Hz

Semiconductor Component:  30 Silicon Transistors;  3 Silicon Rectifiers;  14 Diodes

Dimensions (W x H x D):  415 x 160 x 245 mm

Weight:  8,2 kg (18 lbs)