From the pictures I see it looks like a really nice amp for the price. Dare I say DK-like in concept :-)
If the problem is just misadjuctment of the pot to null DC offset it is a real easy fix. In fact, the circuit board may have markings to identify the pot (probably in Italian) and if so you might adjust it yourself. The amp, and your speakers, will sound even better after you correct this problem.
If the problem is just misadjuctment of the pot to null DC offset it is a real easy fix. In fact, the circuit board may have markings to identify the pot (probably in Italian) and if so you might adjust it yourself. The amp, and your speakers, will sound even better after you correct this problem.