Once you go THX you never go back!
I gotta say, this is the best amp I've ever owned. This amp is simply amazing, I'm going to break my review down into three parts; 1.) Build quality 2.) Sound Quality 3.) Power (hot topic) 4.) How it compares in compare to other amps.
The build quality on this is good, not amazing just a solid good. The metal casing feels solid and the buttons are mostly great, apart from the power button which has a bit too much play for my liking. Otherwise all good.
The sound quality on this is the highlight, it's clean without sounding clinical. If I had to describe the sound in as few words as possible, I would say : Clean, crisp, detailed while still having plenty of power for the low end.
Now onto power, this thing has got power, loads of it, do NOT be fooled by the misconceptions. Although they claim this amp doesn't have a break in period, it does, around 50 hours I would say. Once you've run it in, I would recommend using the balanced output (for max power). I used a pair of Beyerdynamic T1s (600 ohm) with a balanced cable and 96Khz + 24 bit music and with the gain on max and never had to turn the volume above %60. DO NOT be put off by the idea of turning up the gain, this thin is SO clean that it doesn't really affect the sound quality.
How does this compare to other amps in it's price point like the JDS atom or the Schitt Lyr. It blows them out the water. The atom can't compete on power or sound quality, it simply couldn't power my Beyers and when pushed hard distorted like crazy.
Although the Schitt Lyr could compete on power (even better in some cases), it simply wasn't a match in sound quality. Although the Lyr has power, gain increases almost exponentially as you turn up the volume magnifying all the noise and crap, it also wasn't nearly as clean or detailed as the THX. If you think that balanced cables might solve the Lyr's issue, think again, it doesn't even accept balanced, whereas the THX does (bonus)!
My system Hi-Res 96 KHz + 24 bit ---> CHORD Dave balanced DAC ---> THX ---> Beyerdynamic T1s
Would recommend to a friend.