AM/FM 4-Channel Stereo Receiver with CD4 Demodulator
BTL is a JVC original. With it you can play back 2-channel stereo with double power.
This is done by linking the power amplifiers so that when you are playing 2-channel sound two of the power amplifiers do not remain idle; by internal connection they are reconnected so that each of the two channels passes through two power amplifiers.
The 4VR-5456X is ready for the day when FM discrete 4-channel broadcasting starts.
At the moment some 2-channel FM broadcasts are made in matrix 4-channel formats; these can be heard as 4-channel by selecting the appropriate matrix decoder with the mode selector.
When 4-channel FM broadcasting starts, connect a demodulator to the jacks on the rear panel, remove the plate holding the FM 4-channel switch in its off position and switch on.
Connect the FM DET OUT jack on the rear panel to the demodulators input jack and the demodulator's output jacks to the FM 4-channel input jacks.
Tuning range: FM, MW
Power output: 100W/ch (stereo), 43W/ch into 8Ω (quadraphonic)
Frequency response: 10Hz to 50kHz
Total harmonic distortion: 0.5%
Damping factor: 40
Input sensitivity: 3mV (MM), 150mV (line)
Signal to noise ratio: 70dB (MM), 75dB (line)
Output: 150mV (line)
Speaker load impedance: 4Ω to 16Ω
Dimensions: 180 x 513 x 405mm
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Reviewed Feb 19th, 2016 by bissimo
Very powerful unit with lots of features. Decodes SQ and CD-4 internally. Sound isn't as warm as some other vintage units, but it's still very nice.
Reviewed Jan 15th, 2015 by putsche
I bought this unit new in the 70's. Used it in a home recording studio for powering play back speakers as well as general home use. It worked great for years but is having problems driving speakers now. The output is cutting out periodically. I would like to find someone who could repair it if possible.