crate amp ss

[adv]

Hello I have a crate gfx 120 amp. Im getting no sound out of it when I plug in an guiter. I can unplug the guitar and touch the end of the cord and still I dont get any signal noise. When I plug a cord in the external speaker jack and touch the end of it, I get a low voltage shock through my fingers. Does any one know what my probelm could be? os steps on troble shooting the probelm. Thanks for the help adv

[J M Fahey]

Start by plugging a guitar cord into the effects loop return, do you get sound?
Plug it from loop out to loop in, does the preamp work now?

[adv]

Hello JM, Thanks for responding! This amp has two channels. On the front of the amp is where the external speaker jack is and a foot switch jack. It has 3 effects knob(chrous,delay and a reverb).Whats wierd about the amp is It doesnt have a effects loop on it.find it strange that I would get shocked from just plugging in a cord to the ext. speaker jack.I thought that it could be a earth ground jumping some whereThe kid that owns it said he tried to plug a 4 10 cab to the ext. speaker and after that it went down hill from there. I notice that the in put jack seem to be week just by plugging in the cord to it or it felt that way to me. Im going to do a continutity test on it to see what happens! Do you have anymore suggestions? Thanks adv

[Enzo]

I have a better plan, test the speaker first.  If you get a shock from the external speaker jack, that pretty much means the amp is putting output signal there.  Test your speaker by touching the terminals of a 9 volt battery to the speaker terminals briefly.  A good speaker will pop or thump when you touch.  A dead speaker will just sit there.   And the wire/cord between amp and speaker could also be defective.