I'm not on the tour, but I purchased a modded amp from Tom (with the Cardas RCA's & spkr connections, etc.). My main amp is the Mastersound Compact 845 SET amp--I feed its 'direct' input from my Monbrison preamp. Source is the AMR dp-777 DAC, and speakers are Daedalus Audio DA-RMa's, augmented by a REL Strata III sub.
My TBI amp probably only has 100-125 hours on it to date, and I have only listened to it via AC pwr so far---I'm awaiting the return of my BatteryBuss, at which time it will be connected to the BatteryBuss fed by 24v. I need to get out and purchase 8 quality AA batteries and try it powered by internal batteries just for comparison sake if nothing else. Also, most of my listening has been done with the Monbrison pre feeding the TBI; I have the TBI's volume control at max. To further make some audiophiles shudder, I use the dp-777's analog volume control--so in essence I have 3 (the dp-777, the Shindo and the TBI) volume controls in the signal path. However, I have found that using the setup to feed the Mastersound amp's direct input (when I only have the volume control of the Shindo and the dp-777 in the signal path) to be outstanding.
Suffice it to say that I am very, very impressed with the modded TBI! While I won't likely be selling my 845 SET amp anytime soon, the TBI gets really, really close to its sound/magic, and of course at a fraction of the cost. I've had many solid state amps in the past, including another Class D amp--once I was bitten by the SET bug, however, SS just hasn't been able to satisfy me. Well, the TBI fills the bill and I have been very contentedly listening to my setup with it installed the past 10 days or so! It has so much of the SET magic to my ears that I almost find it hard to believe!
Also, note that I have the REL Strata III sub connected via its speaker level inputs to the TBI with no problems whatsoever (some Class D amps share a ground or something so that such hookup cannot be used with them).
Tom, in reading your last post (i.e. the comments about hooking 2 amps up), I'm wondering if somehow 2 TBI's could be used in sort of 'mono' mode, with each powering a single channel, and if there would be any benefit from this (or if the TBI would/could be changed internally to perform in mono mode)? These little guys are so good that considering the price, I'd definitely want to add another if they can be used in this manner.....
Randy