From tremolu–(at)–ol.com Thu Jul 27 11:59:04 CDT 1995
Article: 2512 of alt.guitar.amps
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From: tremolu–(at)–ol.com (Tremolux)
Newsgroups: alt.guitar.amps
Subject: Re: cathode-plus-fixed bias
Date: 26 Jul 1995 19:12:33 -0400
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Reply-To: tremolu–(at)–ol.com (Tremolux)
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Mark, you’re right, I don’t care for the AA568 circuit, it just sounds
weak. I have personally listened to a 68 Super Reverb, before and after,
since I did the electronic conversion. I can say in all honesty that once
that combination bias crap was removed and the amp put back to fixed bias
only, and a 5AR4 rectifier, it was louder and punchier sounding. The guy
who owns the amp agreed with me as well on this.

Another item that has a major impact on the sound of the amp is the
speakers. If you want to compare the sound of two chassis, use the same
speakers for the test. I’m not impressed with the ceramic magnet speakers
in my friend’s 68.

Regards.