Anyone played with this idea? The only commercial example I know of is the second revision Sunn Model T. I had one of the early ones, but not the "red" version, so I don't know what it sounds like. Or if there's problems with hum pickup.
Here's the Sunn implementation:
http://www.angelfire.com/blog/sunnmo...delt2schem.gif
Now my Dean Markley Signature amp has an op amp based active mid that works really well, but they derive a dual rail supply via the bias tap and I don't like that. Makes me nervous that the bias could get dragged down in the event of op amp or zener failure.
Here's the Sunn implementation:
http://www.angelfire.com/blog/sunnmo...delt2schem.gif
Now my Dean Markley Signature amp has an op amp based active mid that works really well, but they derive a dual rail supply via the bias tap and I don't like that. Makes me nervous that the bias could get dragged down in the event of op amp or zener failure.
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