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Speaker Amp Not Turning On
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<blockquote data-quote="HardofWhoring" data-source="post: 8863943" data-attributes="member: 674149"><p>Really not trying to be a dick on this one, but that doesn't make sense. </p><p></p><p></p><p>Most amps are 100-300mv to turn on. Some head units will say how much to not exceed. </p><p>You're never going to blow that fuse if you fuse it that high. </p><p></p><p> This circuit would be a little different then something coming off the battery; What you would theoretically want is a hair under the max voltage on that circuit based on what the head unit can do, and then want wiring larger than that. Which just about any wire is. You don't risk damaging anything if something happens to the wire, because it's a switch wire with a load. The hardest part would be to fuse it just under the limits of that circuit. </p><p></p><p>If you get close to the head unit's limit, the smart thing is to just run a 30 amp relay, (even though it's only because of a hundred millivolts or so if running multiple amps). If you hook up lets say 3 amps, and the are each 200millivolts, and the head unit is 500mv max, then what will happen is it will draw 600mv, and you will fry the internal circuit in the head unit. </p><p></p><p>Just sayin.</p></blockquote><p></p>
[QUOTE="HardofWhoring, post: 8863943, member: 674149"] Really not trying to be a dick on this one, but that doesn't make sense. Most amps are 100-300mv to turn on. Some head units will say how much to not exceed. You're never going to blow that fuse if you fuse it that high. This circuit would be a little different then something coming off the battery; What you would theoretically want is a hair under the max voltage on that circuit based on what the head unit can do, and then want wiring larger than that. Which just about any wire is. You don't risk damaging anything if something happens to the wire, because it's a switch wire with a load. The hardest part would be to fuse it just under the limits of that circuit. If you get close to the head unit's limit, the smart thing is to just run a 30 amp relay, (even though it's only because of a hundred millivolts or so if running multiple amps). If you hook up lets say 3 amps, and the are each 200millivolts, and the head unit is 500mv max, then what will happen is it will draw 600mv, and you will fry the internal circuit in the head unit. Just sayin. [/QUOTE]
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