Oh, I almost forgot these.
If you could find some mint JVC CD-4 records from the 70s, you might want to get them at once. No, they have nothing to do with CD or digital recording. CD-4 was JVCs failed multi-channel format (4 channels to be exact), very similar to todays Dolby Pro Logic. They played beautifully in stereo as well. In fact, I consider the engineering quality of those CD-4 records amount the best of the best. They are so quiet and durable. I bought a few 20 some years ago and I play them regularly. Some of them have been played probably close to a hundred times and still there were at most one or two pops. I dont know how they did that. They are true engineering marvels, great stuff.
If you could find some mint JVC CD-4 records from the 70s, you might want to get them at once. No, they have nothing to do with CD or digital recording. CD-4 was JVCs failed multi-channel format (4 channels to be exact), very similar to todays Dolby Pro Logic. They played beautifully in stereo as well. In fact, I consider the engineering quality of those CD-4 records amount the best of the best. They are so quiet and durable. I bought a few 20 some years ago and I play them regularly. Some of them have been played probably close to a hundred times and still there were at most one or two pops. I dont know how they did that. They are true engineering marvels, great stuff.