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RE: Dynaco QSA-300

Posted by Awe-d-o-file (D) on July 6, 2016 at 15:21:56

In Reply to: Dynaco QSA-300 posted by dpsutphin on July 6, 2016 at 13:06:54:

I built one in the 70's. I seem to remember there was a build option to permanently bridge it making it 150 X 2 instead of 75 X 4. I'm sure the schematics and probably the kit instructions are online somewhere. Does it look factory wired? I would also check the finals right away. Good luck.

ET

HiFi engine has the kit instruction manual/schematic and it talks of the ways it can be internally wired in the kit instructions. Its a 28 page thing. I would read it and check how yours is wired. I seem to remember someone wiring one side together for running a sub and the other in stereo for standmounts therefore making a three channel amp. Read the we tion toward the end called combining channels. This explains how to make it a two or four channel amp and how to optimize it for 2-4 ohm loads or 8-16 ohm loads. It involves jumpers on board pc-43.

ET

"If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936

Edits: 07/06/16 07/06/16 07/06/16

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