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I tune on my frontman 25r and when I input I dont get any sound other than hiss.I tried two different cords and guitars but nothing but his. what should I do?

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It sounds like a failure in the preamp stages, but fortunately you can do a lot of troubleshooting externally.

Drive the "power amp input" jack with another source of audio that has some reasonable output... like a small CD player. If this works (no mind the level, just the quality, that will verify if the power amp is OK.

If the power amp is OK, the use the preamp out to another amplifier.

If it is OK, then the Power amp input jack switch MAY be bad, When nothing is plugged into these, the preamp is sent to the power amp by a switch on the power amp input jack.

If you do these tests, you can email me the results and I will give further tests to run.

Posted on Nov 19, 2009


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