5F6H
1051 posts
Jan 05, 2012
5:44 AM
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It's more common, in domestic wall AC situations (clubs etc) to suffer low AC voltage, which won't damage your gear, but may make your tone "splatty" & hurt dynamics. This is especially the case when using 4 way AC blocks and everyone in the band plugs into the same block. A good idea is to have a long, single point, extension cord for your amp, so you can always plug into your own wall socket.
For situations where you might be relying on generators & the like, where overvoltage might be a problem, a simple & popular "mod" is to fit MOVs (metal oxide varistor) accross the primaries of your amp's power transformer.
Use MOV's of just above the rated wall AC for your country, e.g. 130-150VAC in the US, 250-300VAC in the UK/Europe. They only cost a few £/$. There are various ways to hook them up, but even the most complex will only cost a tech's minimum bench fee.
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