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<blockquote data-quote="Deiimos" data-source="post: 8887182" data-attributes="member: 682903">I’m thinking your voltage is just dropping a bit too much for the amp causing it to shut off. Digital meters can be a bit slow and you may not be seeing the true peak of the drop when it shuts off.I would think your stock alternator / battery would be just enough for that RF amp, but that may not always be the case, or a problem with the battery as mentioned having it load tested. Not sure how old the battery is, but if its a 2020, it might be nearing it&#039;s end of life.Would also think that RF amp is new enough technology that it is unlikely to squeal / hiss, but was sort of common with some older class D amps. I had a couple MTX amps that you could hear them hiss with your ear close to them, but wasn’t a problem (an old 1501D from 2001 or so, and a 6500D if I recall). I think I had an Orion that did it as well (or maybe it emitted a light oscillator whine out of the sub slightly), forget, but some amps would make audible noise from their output inductors if your ear was within a few feet from it. Not sure if this is a thing for the RF amps like this.Is it hissing out of the subs? Or just with your ear next to the amp itself? Could ask in the car audio section over at <a href="https://www.diyaudio.com/community/forums/car-audio.38/" target="_blank">https://www.diyaudio.com/community/forums/car-audio.38/</a> where it is 99% car amplifier repair, someone there may know if it is normal for that model amp.</blockquote>

[QUOTE="Deiimos, post: 8887182, member: 682903"] I’m thinking your voltage is just dropping a bit too much for the amp causing it to shut off. Digital meters can be a bit slow and you may not be seeing the true peak of the drop when it shuts off. I would think your stock alternator / battery would be just enough for that RF amp, but that may not always be the case, or a problem with the battery as mentioned having it load tested. Not sure how old the battery is, but if its a 2020, it might be nearing it's end of life. Would also think that RF amp is new enough technology that it is unlikely to squeal / hiss, but was sort of common with some older class D amps. I had a couple MTX amps that you could hear them hiss with your ear close to them, but wasn’t a problem (an old 1501D from 2001 or so, and a 6500D if I recall). I think I had an Orion that did it as well (or maybe it emitted a light oscillator whine out of the sub slightly), forget, but some amps would make audible noise from their output inductors if your ear was within a few feet from it. Not sure if this is a thing for the RF amps like this. Is it hissing out of the subs? Or just with your ear next to the amp itself? Could ask in the car audio section over at [URL]https://www.diyaudio.com/community/forums/car-audio.38/[/URL] where it is 99% car amplifier repair, someone there may know if it is normal for that model amp. [/QUOTE]

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