JVC 4DD-5 Demodulator

The 4DD-5 was a CD-4 demodulator manufactured by the JVC Corporation. It allows the owner to listen to QUADRADISC records in 4-channel audio. Its circuitry checks the presence of CD-4 encoding material and automatically switches over to this mode. This unit consists of 6 ICs, 6 FETs, 27 transistors, and 23 diodes in its construction.