This is my favorite quadraphonic receiver, the Harman Kardon 900+.
This was Harman Kardon's top of the line quadraphonic receiver, boasting a built-in SQ decoder and CD-4 demodulator. Inside one finds two power transformers, one for each pair of channels. Another neat feature is the FM quieting meter which indicates the relative signal to noise ratio of a broadcast signal. Used with an antenna on a rotator, one can easily find the best (quietest) signal.
This was Harman Kardon's top of the line quadraphonic receiver, boasting a built-in SQ decoder and CD-4 demodulator. Inside one finds two power transformers, one for each pair of channels. Another neat feature is the FM quieting meter which indicates the relative signal to noise ratio of a broadcast signal. Used with an antenna on a rotator, one can easily find the best (quietest) signal.
