Simmons DA200s Blown Fuse

[Jazz P Bass]

My only gripe with replacing the fuse is that If there is something going on with the internals, more damage is caused by turning it on in a failed state.

The manufacturers specs for the amplifier call for 14 watts consumed at idle.
400 watts at full power.

So if this unit has a 4 amp fuse installed & it blew simply from turning on the amp, I would expect something to be seriously wrong.