I have a Bryston 4b power amp. It is I believe the original one with square transformers. I had 300 ma of DC offset on the speaker terminals on one side. Saw that the power resistors looked overheated(which seems to be a common problem on these amps), so I decided to change them out along with the electrolytic caps. The amp sounded good, but eventually fried a tweeter before I decided to change these parts. I only did one side of the amp before testing it with a variac and a dim bulb tester. What is happening now is at 40 volt on variac everything is good, sounds good, as I turn up the variac the bulb begins to brighten at about 60 volts. I am hoping I can get some feedback from you guys as to what could be causing this current draw and what I should test or look for. The amp sounds the same as I turn up the variac. I tried he variac with the dim bulb on the other side and it does not light up. So there has to be an issue with the bad side of the amp.