https://www.diyaudio.com/community/threads/x150-5-testing-and-planning-for-the-future.395007/page-2
Yes, Bias points A B on input boards. Room @ 25 deg C. Dialed it back a bit to 125 mv for each quadrant. Then, tested voltage drops across 0R47 n channel source resistors for the 2 quadrants accessible without tilting the heatsinks. In Theory should be close to 62.5 mv right? Left Channel A Quadrant front to rear 58,65,57,68,59,65,56,68,64,67 (mv) Right Channel B Quadrant 69,64,72,66,73,65,75,70,74,67 (mv). Definitely greater than 10% drift..... Looks like I'll be pulling the output boards, replacing resistors and testing mosfets. Upside is better sound when fixed!
Kako original pass amp izgleda sa tranz i njihovo uparivanje. 🤗