#1
More specifically the power amp and/or speaker.

I was playing at a moderate volume through the acoustic model and I had to go do something so I unplugged my guitar (has active pickups), and when I did this the amp made a loud humming sound. I thought nothing of it and turned off the amp. After much troubleshooting I looked at the schematic in the manual and it showed that I could bypass the power amp and speaker by plugging into the headphone jack. I did this and the humming stoped, and I can hear sound through the headphones. I bought this amp last summer and the power amp/speaker is already shot. I quite liked the sound of this amp and am quite disappointed because I take really good care of my gear. Is this even worth repairing? It's about $350 new.
#2
Uh... I'd say it's just the cable dude. Did you try it with another cable?
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#3
Well usually when your cable touches something when nto plugged into your guitar it makes a hum... Unless you mean it the other way round?
#4
There's nothing wrong with the cables. It hummed loudly with absolutely nothing plugged into it. Keep in mind I can still play with the headphones plugged in. According to the schematic, the problem clearly lies with the power amp and/or speaker.
#5
Quote by CHIEF-CHEESE
There's nothing wrong with the cables. It hummed loudly with absolutely nothing plugged into it. Keep in mind I can still play with the headphones plugged in. According to the schematic, the problem clearly lies with the power amp and/or speaker.


Ah right =/
#7
its your speaker i bet. if you mess around playing with feedback alot that could be why it blew even if it wasnt too loud. 50$ at the most. you can put it in yourself.
#8
I do have a whammy pedal, so the +2 octave pinch harmonics probably didn't help lol. I hope you're right about the speaker, I'll check out swapping it for a vintage 30 if I can get into the cab. I should try putting my meter on the power amp first though.

Edit: Turns out the speaker's fine, power amp is fubar'ed. Hope Roland doesn't charge too much.
Last edited by CHIEF-CHEESE at Mar 25, 2008,