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I'm sure you guys are tired of seeing pictures of my solid-state projects, but IMHO the well-rounded audio amateur doesn't restrict himself to any one technology. And the tube DIYer can always benefit from the experience gained playing with transistors.

This is my implementation of the "AAK" dual transistor output pair version of the SymAsym amplifier, described on diyAudio at the link below. When I started building solid-state amplifiers about 35 years ago, the fastest available output transistors had gain-bandwidth products on the order of 4MHz. The output devices in this amplifier have an Ft of 30Mhz. The result is nearly a decade more open-loop bandwidth to play with, giving all kinds of technical benefits.

Things that really strike me about this amp:

- It is dead quiet
- It has authoritative bass
- It throws a wide, deep soundstage
- Its treble is extended, detailed, smooth, and grain-free
- My wife likes the sound

I am now working on plans for a tube line preamp.

Have fun.

-Henry



Edits: 04/01/12

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Topic - Latest project - op48no1 19:54:16 04/01/12 (23)

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