Reply to thread

Message

<blockquote data-quote="Lasherž" data-source="post: 8703794" data-attributes="member: 679555">Oh, hold up. I don&#039;t know why they decided to separate the specs like they did.. They quote both a 62A draw, 65A fuse rating, and 124A (sinusoidal). I&#039;ve never had an amplifier brand recommend a lower amp fuse than it could even theoretically supply at its RMS wattage and 14.5v. Using the other method for fusing you&#039;d do worst case scenario, 1200w rms / 12.2v / .88 for efficiency loss between draw and output, class D&#039;s are very efficient. That&#039;s 112A So I guess it would be better to approximate based on that. The odds of you jamming that hard at that low voltage (car off) are pretty low if you value your battery health, so I think 110A is the fuse to get. The cable would then need to be 4 at a minimum and 2 would help with voltage drop to the amp terminals and give you a little wiggle room later.Sorry about that, I&#039;ve never seen such a dumb fuse recommendation. It makes me wonder if the amp really is 1200w RMS</blockquote>

[QUOTE="Lasherž, post: 8703794, member: 679555"] Oh, hold up. I don't know why they decided to separate the specs like they did.. They quote both a 62A draw, 65A fuse rating, and 124A (sinusoidal). I've never had an amplifier brand recommend a lower amp fuse than it could even theoretically supply at its RMS wattage and 14.5v. Using the other method for fusing you'd do worst case scenario, 1200w rms / 12.2v / .88 for efficiency loss between draw and output, class D's are very efficient. That's 112A So I guess it would be better to approximate based on that. The odds of you jamming that hard at that low voltage (car off) are pretty low if you value your battery health, so I think 110A is the fuse to get. The cable would then need to be 4 at a minimum and 2 would help with voltage drop to the amp terminals and give you a little wiggle room later. Sorry about that, I've never seen such a dumb fuse recommendation. It makes me wonder if the amp really is 1200w RMS [/QUOTE]

Verification