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Phil Allison[_3_] Phil Allison[_3_] is offline
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Default Did I blow my amp?

John Robertson wrote:


I'm with Jamie here. Have you powered up the amp with ONLY the speakers
hooked up? No other cables going to the inputs.



** Roland Cubes are combo amps with the speaker internally wired.


If the hum level is steady, then the problem could be a blown fuse on
one of the power amp rails (B+ or B-).


** None that I have seen use DC rail fuses, they normally have fuses in the two AC lines coming from the transformer. If one of them fails, the amp continues to work. When both fail, it goes silent.



.... Phil