SET Asylum

RE: Serious Stereo 2A3, a DC -coupled, 2-stage amplifier

89.253.73.146

In Reply to: RE: Serious Stereo 2A3, a DC -coupled, 2-stage amplifier posted by drlowmu on October 20, 2007 at 10:10:26

If you remove the volume pot on an integrated amplifier and place it in a separate chassis, you have a "passive preamp." You have also made your amp, now pre-power amp combo, susceptible to impedance. The high output impedance of the "passive preamp" means you have to use short interconnects or you risk attenuate the signal. And you get zero other benefits.

As I so bluntly put it in my previous post, if you do not know why a 45 sounds different from a 2A3, you should read a book. I know I could have phrased is better. But let's stick with Ken Shindo. He knows why. He does not make preamps just to add stuff in the signal path, but to improve the performance of the power amp and the whole sound system.

Not everybody is as good as Ken Shindo. After all, designing amplifiers is a craft. But if Ken could not design a preamp that sounds better than a volume pot, he could hardly be called an audio designer. I am NOT an audio designer. I do dabble in it and design the odd amplifier. And even at my level, I ask of myself to be able to do at least that.

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