Hi all, I've got an old Pioneer 3 in 1 which I mostly use to listen to records, but the left channel seems to be louder than the right. The right channel barely has any bass and seems to be very rich in the mids and is relatively quieter. I have the same problem with aux or radio. I tried cleaning the balance knob potentiometer and listened with headphones but the problem persists. Any help\/suggestions on what I could try would be appreciated.