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AMP Not Powering Up or Staying Powered
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<blockquote data-quote="hispls" data-source="post: 8753445" data-attributes="member: 614752"><p>It would never protect that amp from hurting itself if that's what you mean, but that shouldn't prevent the amp from powering up. If you are not opening fuses when you push the amp hard it is very likely your fuse is too large to keep the amp from harm. Even under-fusing is possibly not enough as fuses can pass a LOT of current before they fail... not for long, but long enough to destroy semiconductors. For example, if you were an amp repair shop trying to get that amp up and running you would be using 3-5A fuse on the power to try to turn it on and do testing. That's about the low fusing required to really protect MOSFETs from detonating if something goes really wrong internally.</p><p></p><p>As someone else said fuse is meant to prevent a fire if the wire shorts. Amps have """protection""" circuitry to protect themselves but even that isn't 100% fool proof. </p><p></p><p> Are you quite confident power and ground are both solid and intact all the way to the battery? Clean and tight connections on terminals to the battery? Double check your fuse is still good. It is possible for a fuse to partially open or only look intact and have a hairline break in the element.</p></blockquote><p></p>
[QUOTE="hispls, post: 8753445, member: 614752"] It would never protect that amp from hurting itself if that's what you mean, but that shouldn't prevent the amp from powering up. If you are not opening fuses when you push the amp hard it is very likely your fuse is too large to keep the amp from harm. Even under-fusing is possibly not enough as fuses can pass a LOT of current before they fail... not for long, but long enough to destroy semiconductors. For example, if you were an amp repair shop trying to get that amp up and running you would be using 3-5A fuse on the power to try to turn it on and do testing. That's about the low fusing required to really protect MOSFETs from detonating if something goes really wrong internally. As someone else said fuse is meant to prevent a fire if the wire shorts. Amps have """protection""" circuitry to protect themselves but even that isn't 100% fool proof. Are you quite confident power and ground are both solid and intact all the way to the battery? Clean and tight connections on terminals to the battery? Double check your fuse is still good. It is possible for a fuse to partially open or only look intact and have a hairline break in the element. [/QUOTE]
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