It could be the input jack commin loose and making noise when thepower comes on or the cable moves in the jack. Or it could be something in the output section. Also resetting the amp will lose all your presets. Not that there are that many on a spider but just a heads up. It sounds like something internal is starting to go. Like when the amp heats up during use it pops and cuts out, sounds weak etc.. Take it to a tech.
Gil
Gil
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