Hello AK members, This is my first thread, so if I'm doing something wrong please let me know. I'm pretty new to this vintage stuff, but I already like it a lot. A few months ago I bought my first vintage amplifier: Pioneer SA-7500 II. After I bought it I found that this isn't one of the best sounding amplifier from Pioneer, but I have to live with it for now. The amplifier had one burned output (I knew that before I bought it), and since I wanted to recap it anyway I figured it wouldn't be a major problem- just have to buy the transistors as well I've read a lot of threads on recaping old amplifiers and I felt confident I can do the job myself. I'm not an expert on fixing stuff (I'm an accountant), but I learned how to mount a transistor and a diode. I used Panasonic FC and Nichicon PW for the caps, and for the transistors On Semiconductor and Fairchild. After the rebuild I tested the bias and now things turned out to be more difficult- it measured 2 mV. So I cut the jumper and the idle current incresed to 3 mV. The manual says it should be between 10-70 mV The unit sonds OK, well almoust OK; the sound is there but something is missing. The bass is a little short, like not full enough. Since there are no pots to adjust, I don't know what to do next. If someone has this unit and encountered the same problem and would like to share the answer, I would be verry gratefull. *Also, english is my second language, so please forgive me if I misspelled something.