My son's guitar amp Epiphone guitar amplifier model ep-800, does not work after someone plugged a bass guitar on high settings. He tried it the next day, only to find out it didn't work. Could the bass blown the circuits?

Hi and welcome to FixYa,

Almost always, a Bass guitar would require a hefty amp quite different in terms of construction design to most guitar amps.

Offhand, the problem would be internal on the electronics board. Most likely culprit if it will power on but no sound would be the final/output transistors.

If there is no power indicator at all, then it would most likely be the power supply section.

Any competent electronics tech should be able to perform the repairs since the parts (to my knowledge) are readily available from most electronics parts stores including Radio Shack and **** Smith.


Good luck and thank you for using FixYa.

It could have blown the speaker, a regular guitar amp is not meant to handle a bass, you should be able to look into the back of the amp and see if any of the speaker is damaged, or there may be a blown fuse inside the amp, if you check for this please MAKE SURE TO UNPLUG THE AMP FROM THE POWER SOURCE FIRST, and if needed replace the fuse with the exact same type

One sure way to tell if the speaker is blown is this simple test. You don't need a tester box, just this you need to butterfly clips with the wire. remove the wires from the speaker put a clip on each terminal. Now with a C size battery touch each end of the battery , you should hear a scratching sound . if you do then you speaker stills works. This test will not tell how well, but it still works. no sound then you out of a speaker. But replacement speakers can range in the price range from 50.00 / 150.00 depending what you want to spend. Note of interest. a expensive speaker will blow out just as fast as a lesser priced one.
Good luck testing. DFD