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<blockquote data-quote="Deiimos" data-source="post: 8774881" data-attributes="member: 682903">An amp like the Schoche would start with maybe a 7 amp fuse for initial testing, no higher than a 10 amp. It’s obviously blown, so I wouldn’t worry about that now though.The Hifonics would probably need a 15 amp fuse, could try a 10 obviously first. If both of those sizes blow, then highest to try would be 20 amp, but I wouldn’t go higher than that and would start with the lower fuses first. If it just blows the fuses, it likely has some bad transistors.Zero ohms from drain to source, or near zero ohms = bad MOSFETs, often all three terminals end up shorted so is quick to tell if they are bad. The Schoche amp probably uses bipolar output transistors (I&#039;m not sure though). If you need detailed help troubleshooting the amps, I&#039;d highly suggest signing up at <a href="https://www.diyaudio.com/community/forums/car-audio.38/" target="_blank">https://www.diyaudio.com/community/forums/car-audio.38/</a> and posting each amp in a separate thread in the car audio section (so just one amp at a time in its own thread to minimize confusion). A couple guys there that are very knowledgeable and may help try to walk you through testing / repair if you can follow the instructions carefully. It&#039;s the best site if you want real help with car amplifier repair though. It isn&#039;t a typical car audio forum, that section is mainly just repair help.And no problem, hopefully you get the amps figured out. Amp repair can be fun, or a nightmare depending. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite18" alt=":ROFLMAO:" title="ROFL&nbsp; &nbsp; :ROFLMAO:" loading="lazy" data-shortname=":ROFLMAO:" /></blockquote>

[QUOTE="Deiimos, post: 8774881, member: 682903"] An amp like the Schoche would start with maybe a 7 amp fuse for initial testing, no higher than a 10 amp. It’s obviously blown, so I wouldn’t worry about that now though. The Hifonics would probably need a 15 amp fuse, could try a 10 obviously first. If both of those sizes blow, then highest to try would be 20 amp, but I wouldn’t go higher than that and would start with the lower fuses first. If it just blows the fuses, it likely has some bad transistors. Zero ohms from drain to source, or near zero ohms = bad MOSFETs, often all three terminals end up shorted so is quick to tell if they are bad. The Schoche amp probably uses bipolar output transistors (I'm not sure though). If you need detailed help troubleshooting the amps, I'd highly suggest signing up at [URL]https://www.diyaudio.com/community/forums/car-audio.38/[/URL] and posting each amp in a separate thread in the car audio section (so just one amp at a time in its own thread to minimize confusion). A couple guys there that are very knowledgeable and may help try to walk you through testing / repair if you can follow the instructions carefully. It's the best site if you want real help with car amplifier repair though. It isn't a typical car audio forum, that section is mainly just repair help. And no problem, hopefully you get the amps figured out. Amp repair can be fun, or a nightmare depending. :ROFLMAO: [/QUOTE]

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