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In Reply to: ARC SP-12 noise posted by Georgetube on February 3, 2003 at 09:53:29:
Call ARC, they will gladly sell you the owner's manual with schematics.
You are probably tube microphonics excited by the high sesitivity speakers.Try relocating the preamp to a spot in the room where there is a bass null (play a bass solo record and walk around, with your head about the same height as the preamp). Sometimes moving the preamp to a higher or lower shelf will do.
Also, you may want to call Kevin Deal at Upscale Audio (AA sponsor) and ask him about tubes selected for ultra-low microphonics plus tube dampers.
Good luck
Carlos
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Follow Ups
- Re: ARC SP-12 noise - Carlos 02/7/0313:42:39 02/7/03 (0)