While the amp might be able to produce 100watts/channel for a short period of time, it simply does not have enough heatsinking or ventilation of those sinks to produce a continuous 100wpc RMS. Nor do I know of any pair of transistors/mosfets (save for some very large industrial MosFets, which they're not) capable of doing this. That being said, they may be capable of that power for intermittent periods. Not seeing any inductors, I'm assuming its a low bias class aB amp, and their are certain realities, efficiency and thermal dissipation that one cannot bypass. It certainly does look like a good material value. I've dealt with Eddie Wu at diykits.com/hk, and have allways been very pleased with the products (Zhaolu dac) and their support I've received from him.
FWIW,
Paul