I picked up a NAD 312 today, cosmetically it looks great, it was going for next to nothing so I took it untested. It has a gremlin that's a little baffling. Hoping if someone has experienced this before they can offer some insight.
The left channel is louder pulling the center image quite noticeably to the left. I had to adjust the balance to 3 o'clock before it straightened out. When the volume is all the way down I can still hear a very soft signal coming through only the right. I switched out speakers, cables, source and changed inputs and it's definitely the amp.
Next I started looking at the pre/main connections. I swapped the pre/main jumpers around, no change. I then replaced the jumpers with RCA cables, no change. This is where things got weird. I used the RCA cables to cross channels PreL to MainR and PreR to MainL... and now it's perfectly balanced and center!
That doesn't make sense!!! I would have expected it to pull center off in the opposite direction.
With my inputs also LR swapped everything is perfect. I would however like to get it working as designed at some stage, so if anyone has any ideas, please shout.
The left channel is louder pulling the center image quite noticeably to the left. I had to adjust the balance to 3 o'clock before it straightened out. When the volume is all the way down I can still hear a very soft signal coming through only the right. I switched out speakers, cables, source and changed inputs and it's definitely the amp.
Next I started looking at the pre/main connections. I swapped the pre/main jumpers around, no change. I then replaced the jumpers with RCA cables, no change. This is where things got weird. I used the RCA cables to cross channels PreL to MainR and PreR to MainL... and now it's perfectly balanced and center!
That doesn't make sense!!! I would have expected it to pull center off in the opposite direction.
With my inputs also LR swapped everything is perfect. I would however like to get it working as designed at some stage, so if anyone has any ideas, please shout.