Ampeg Super Jet SJ-12T repair… abram, April 5, 2013August 24, 2016 I’ve seen a lot of the same complaints on various forums regarding these amps. Basically, the amp starts to get noisy and the occasional arcing can be heard through the speaker. The problem seems more exaggerated when using the tremolo circuit which is just a phase-shift LFO modulating the negative… Continue Reading