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Discussion Starter · #1 ·
Hi all, this is obviously my first post but not my first time around the block with audio.

I currently have an issue with my Adcom GTP-450 pre amp with the left channel.

About 6 months ago the left channel just cut out. It does not work no matter how many times you cycle the unit on and off but will work if you turn the balance all the way to the left and then max out the volume. Then it will play at... well max volume. I proceed to turn the volume down to normal operating levels and it will work for a small time, say 3 or 4 seconds and then cut out again.

The pre amp is VERY clean on the inside, not just for a 19 year old electronic but actually clean.

My question is where should i begin in troubleshooting this?

I have tried the typical switching inputs, sources, flipping the cables...

I don't mind getting my hands dirty, I troubleshoot dimmers, ballasts, and GP panels for a living.

Thanks in advance
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