The TA-10.1 was well received by visitors to the Lone Star Audio Fest in Dallas this past weekend. We had my stock 10.1 plus a Michael Mardis Signature edition along with his Octopus amp. Most of the demos were done with the stock 10.1, my ART Array line array speakers, and an Arcam FMJ CD player. Several visitors asked questions along the lines of "What's that little preamp?", followed by an exclamation of surprise when they learned that "little preamp" was actually the amp driving the line arrays to room filling levels with chest-pounding bass. Anybody else who was there, please give us your impressions of this system!
This was my first opportunity to compare the stock 10.1 the Michael Mardis edition and to the Octopus amp. The stock 10.1 is a nice sounding amp, much better than you would expect for the price. The only downside I could hear is that it is bright. It's not the grainy brightness I've heard with some inexpensive solid state amps, and orchestral strings sound very nice, but the treble sounded a bit exaggerted to my ears. This was especially apparent when I briefly replaced the 10.1 in the system with a high quality SET tube amp.
The Micheal Mardis upgrade eliminates the brightness, but with no loss of detail. The effect is similar to what I heard when I upgraded my Magnepans' Solen tweeter caps to NorthCreek film caps, with a more balanced sound and a more open soundstage, where the instruments' positions are more easily recognized.
I'm not familiar with the Octopus amp, but I heard it uses a more powerful chip. That was obvious when I cranked up the volume - it will play louder than the 10.1, and it has the same treble clarity as the Mardis Signature edition 10.1. It seems to be a good solution for anybody who wants the good sound but needs more power to drive less efficient speakers. I believe Mike Weiss told me the sound of the Octopus is similar the the higher power T amp that's under development for his AudioMagus shop. I hope so.
I'll have the unmodded TA-10.1 at the Lone Star Bottlehead Meeting in San Antonio on the 19th, and everybody is invited to join us and hear it. I now have a 12V, 7AH battery power supply, so you can hear it with that as well as the stock switching power supply.
http://lonestarbottleheads.org/