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Re: Peavey KB100 75 watt keyboard amplifier. Dear Sir, After having plugged into the 'PRE EQ PATCH' the main 3 inputs/channels are no longer working. I looked in the operating guide and found that, "If the second click of the Out/In jack is utilized without returning any signal to the system from an effects device, the remaining preamp functions will be disabled." (and disabled they were!) It doesn't make any real sense that it would be simply that easy to damage the amp. Awright now, what is it that I have to do to 'restore' the remaining 3 inputs/channels. Your help would be gratefully appreciated. Sincerely, Patrick MacCarroll av8rpat@comcast.net 313-570-3185

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Patrick - There are surface mounted input jacks on a lot of Peaveys. The jack (effects loop/pre-EQ ) jack may just be dirty or stuck. Try spraying the jack thoroughly with electronics cleaner (Radio Shack) and work a plug in and out of the jack.

Posted on Jul 29, 2008

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The pre-eq patch connector is a 3 -wire connector designed as both an input and output in one connector. With a plug in there that only utilizes the output (send), you are not sending any signal to the amp section. That appears as no output. Take out the cable and the amp should be restored to original function. What you need to use that function is called an "insert" cable. This has a stereo 1/4" plug at the end for the "pre eq patch" side and 2 standard 1/4" plugs at the other end. One is for input into an effects box and the other is for the output from that efects box.

Hope this helps,
Dan

Posted on Jul 29, 2008

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