Are Theta amps made by Ayre ?

Theta amps are made by......Theta. I assume you are looking at a Dreadnaught or Dreadnaught II. Charlie Hansen of Ayre Acoustics did contribute his expertise in designing the original Dreadnaught.

The circuit topology in the original Dreadnaught was a collaborative effort between David Reich of Theta, Charles Hansen of Ayre, and Jim White of Aesthetix. The Dreadnaught II offered improvements that were designed by David Reich at Theta.

All of the posts are essentially correct except the one by Fsarc. The first Dreadnaught amp wasn't really a collaboration between myself, Jim White, and David Reich. Here's the real scoop:

I met Jim White at the Tokyo Hi-Fi show around 1998 or so. Theta wanted to get into the amplifier market. Jim White specified the feature set (up to five channels, modular design so that channels could be added, single power transformer, size, cost, power, et cetera). I designed the amp and built them a prototype. Just as I was finishing the design, Dave Reich left McCormack Audio and Theta hired him. Since they now had their own amp designer, Dave did the final production testing and made slight changes to the bias circuit and also how the input circuit switched between single-ended and balanced. That was it. The rest of the amp was my design.

Charles Hansen
Ayre Acoustics, Inc.

Charles- Thank you for correcting my misinformed my post. It's always nice to get correct facts direct from the source. My apologies for not getting it right the first time.

Fsarc -

No need to apologize. Only a handful of people knew the facts. Theta originally was working with a much more famous designer to design their amps, but it didn't work out. When they hired me, I wasn't that well known and so they didn't want to make a big deal about the fact that I was the designer. Then when they hired Dave Reich (a great move by the way, as he is a very talented designer as well as a super hard working guy) -- unfortunately the rumor I heard was that ATI fired him as soon as they bought Theta -- I don't know if that's actually true), they *really* didn't want to publicize the fact that I designed it. It would have seemed bizarre to have just hired an amp designer but have hired someone else to design your amps! The Citadel, Intrepid, and Enterprise were all based on the Dreadnaught circuity. At this point it's pretty much ancient history. All of that happened over ten years ago. Since then they have made some modifications to the Dreadnaught to create the Dreadnaught II and also to the Citadel to create the Citadel 1.5. Hope this helps.