I am selling a new amplifier. There are no issues. I built it myself a few days ago by buying all the parts. The transformer is original copper from Russell. The bass doesn't crack at full volume, and there is no humming. You can easily run 6/8/10/12-inch speakers with this. Call or message me if you want to buy. Selling because I need money urgently. Please don't offer ridiculous prices; I will keep it for a while if needed.