Pros: Airy and detailed, good bass, addictive midrange, tube-rolling, discrete components, moddable, price
Buying a used MF X-Can V3 is one of the best deals I have ever done. This is high quality stuff easily compared to headphone amps costing three or four times the price I paid. The amplifier is using exclusively discrete components. It works very nice driving my Sennheiser HD650 and even AKG k701 and k501. The rated power output is 1 W so I guess this amp would even manage to drive a pair of sensitive speakers. The amp I own is modded with some new Panasonic capacitors and a pair of Russian NOS tubes. I cannot speak of any differences in SQ between the modded vs unmodded X-Can but only the fact that anyone with modest soldering skills can change some vital components in this piece of equipment is a big pro to me. The moddability of this amplifier makes it a great second-hand value. Highly recommended!