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[user 19847]

My name is Andy Rogulich, and I am the Owner and Mastering Engineer at High Fidelity Mastering in Albuquerque, NM. Our studio can Master new audio recordings as well as do audio restoration. I have Quadraphonic playback capability in SQ, QS, and CD-4 formats, as well as 4-channel Reel-to-Reel and 8-Track. My website is www.highfidelitymastering.com.

I have the JVC, Marantz, and Pioneer CD-4 Demodulators. I read the specs for the Technics SH-400 demodulator, which has 30db of channel separation between front and back. I am interested in your opinion which CD-4 Demodulator is considered the one to use? The Technics also is the only demodulator that uses a carrier crosstalk canceller adjustment requiring their special CD-4 test record. I was wondering what is the audible benefits of that control when playing back CD-4 records?

 

[kfbkfb]

The SH-400 is a 2nd generation CD-4 demodulator which uses the CD-4 QSI-5022 integrated circuit. IMHO, it's better than other consumer grade CD-4 demodulators.

A thread about the SH-400 and the CCC:
https://www.quadraphonicquad.com/forums/threads/technics-sh-400-and-the-ccc.30222/
There's also a software CD-4 decoder with automatic front/back channel separation adjustment
(it will run under Windows with an Apple virtual machine/emulator):
https://pspatialaudio.com/JVC_CD-4.htmThere are actually 2 CD-4 software decoders, the "soft fail" version in the above link and the full channel separation in all directions at all times "classic" version:
https://pspatialaudio.com/CD4_classic.htm

aside:
I have an SH-400 but not a CD-4 capable phono cartridge, the SH-400 provides fair quality quadraphonic sound even with a non-CD-4 phono cartridge.


Kirk Bayne

 

[user 19847]

Thank you very much for the info on the SH-400 and the CCC circuit; most helpful.