I'd love to snag a T-Amp sample (and keep it), but I'm not getting my hopes up. Trimark, the company that made the chip inside went belly up about a year ago.
I apologize for not doing any research, but aren't there laws against products that cause RF interference?
Yes. Clearly, Scythe could get themselves into trouble here...
I'm surprised you didn't mention power draw in the review. The reason I bring this up is that my receiver has a very high idle draw -- 50W. What's funny is that playing music at decent volume only increases the draw by about 10W. With only 15W output, I'm sure the Scythe can't have much of a draw, but I'd be curious to see if it idled close to 0, like one might expect or if the idle draw is actually pretty close to full load (as I'm suspicious it is).
I'm afraid I didn't do this, but I can tell you that the brick is rated for 3A at 12V. Some other power tidbits: Scythe cites 88% efficiency and 10W per channel, which works out to ~23W with both channels going full tilt. I think the fact that the interference gets noticeably worse when the volume is turned up suggests that the power draw also increases significantly.
Anyway, regarding the interference issues with the Kama Bay Amp's power supply: try using a car battery to power the amp.
I wouldn't expect this to solve the problem. Remember, the interference was present even when the Kama Bay Amp was powered from the system. The problem is in the unit itself, not the power supply.
Most amps list a frequency response range. The norm being 20hz to 20000hz Was that stat left out of the review? or does the karma bay amp not publish one?
Not published by Scythe, but the datasheet from Yamaha
shows a response curve that is almost perfectly flat up to ~20,000 Hz. I'm not really one to trust a spec sheet though. Theoretically, the amp should be pretty good up to about half of its switching frequency.
No subwoofer support leaves out A LOT of people.
Only if you're thinking in terms of regular computer speakers. A pair of good quality bookshelf speakers should sound better without a subwoofer than your average computer speakers with one. Bear in mind that computer subs aren't so much subwoofers as just woofers that are intended to compensate for the poor low end of the tiny satellite speakers that sit on the desk. With proper speakers, you should get decent low end without needing a subwoofer, and you'll have better balance to boot.