Question about Crate Music
Silent when guitar not plugged in, but when guitar plugged in there is a buzz/hiss consistant across all three channels of the amp
I also have this issue. Same crate combo amp. There is a loud buzz emitted only when there is a cable plugged in. Cables and instruments checked good, only possible issue is inside the input of the amp. Popped it open, solders and connections were intact and appeared solid. Anyone have a guess as to why this is happening?
Posted on Nov 29, 2013
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Posted on Jan 02, 2017
the buzzing is indicative of an open ground connection, check the cord by substitution or with an ohm meter, if the cord is good look at the connections to the jack inside the amp ( im guessing you built the amp from a kit). Is this a solid state amplifier? Tube amps have lethal votages and should not be experimented on without knowledge of electronic safety. Also if there is more than one input to the amp try plugging the guitar into another one and see if its still the same.
Posted on Jan 02, 2009
The buzzing noise could be caused by a grould feedback loop. This occures when the amp is plugged into one power socket and the guitar's amp is plugged into a drifferent power socket.
Try to use a power board, plug in all your devices into this power board and plug the power board into a power socket.
Posted on Jan 03, 2009
SOURCE: amps broken need to fix it
Their may be a schematic on the inside of the amp.I don't remember if Crate puts one or not. And I have had several Crate amps. never needed repair except for tube replacement. If there is not one in side , go here and find what you need . http://www.crateamps.com/support/warranty/ Good luck DFD please rate me TK U
Posted on Apr 19, 2009
Not a fuse. First thing, to check your speaker (amp unplugged, of course), touch the + and - speaker connections to a 9V battery. If you don't hear a pop sound then your speaker is blown. Thus, no output sound. If speaker is OK, then the output IC is your problem.
Posted on Jul 25, 2009
SOURCE: Buzzes and feedback
Make sure the "ground lift" option is used on the direct box.
DO NOT UNDER ANY CIRCUMSTANCES use a headphone output jack as the output of this unit. The headphone jack is for HEADPHONES that have no return to ground. Use of this as drive to a sound board is sure to cause problems and in some cases can fry these amps due to the circuitry.
The cable used to go to the direct box should be very short and high quality.
You should source the power for this unit from the SAME source and receptacle as your sound board if at all possible.
Posted on Nov 08, 2009
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