| marshall bass state 150 problems [message #27268] |
Thu, 27 April 2006 15:36  |
rumblekat
Messages: 2
Registered: May 2009
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Esquire |
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looking for help with a second hand amp i bought which seemed to be o.k. until i gigged with it. the fault is exhibited as this :-
volume starts to fade out after about 20 mins of playing. have used a pre amp plugged into the effect return to discount possible preamp problem. Ran amp out of its case with no input but all controls on full (speaker connected)to check for over heating, mosfet heat sinks stayed cold,all high wattage resistors apart from 2 became quite hot (other 2 were cold?) any assistance or ideas would be greatly appreciated.
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