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I was playing guitar through my fender 85 amp and the volume suddenly cut out to almost nothing and I couldn't make it loud again?

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The speaker could be blown. Try touching a 9volt battery to the terminals on the speaker. If the speaker makes a popping sound its not blown. The other culprit could be the input jack of the amp. If its soldered directly to the board. The retaining nut may have come loose and the jack wiggle around with the cord tension. resulting in a solder connection breaking at the board. But that usualy will give a ground hum or no sound at all. So im leaning towards a blown speaker. (providing its a solid state amp) If it's a tube amp. it could be that one or more of the power tubes are bad or have a vacuum leak and may need to be replaced. ( you have to replace all the power tubes at the same time and have the amp biased.

Posted on Aug 21, 2008

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