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<blockquote data-quote="ItsMixedUp" data-source="post: 8737299" data-attributes="member: 682413">So I was gifted a sub off a mate which runs at 250W @ 4 ohms and just bought an amp, the amp is a Juice Ja1201d 1200W peak (I don&#039;t believe this rating lol), rms 480W @ 1 ohm, 380W @ 2 ohm and 225W @ 4 ohm. It has a 50A fuse on it. I was trying to do some math to figure out what fuse I needed from the battery but I am struggling to find out what figure to use. If I use the supposedly peak power figure I do 1200/0.8 then 1500/13.8 is 110A which is way above the 50A on the amp this is why I don&#039;t believe this rating. If I do the 480W @ 1 ohm then this works out to be about 43A which is closer to the 50A on the amp. Should I buy a fuse which is 30% bigger then the one on the amp? (this is what it recommends). Also I just bought some 8 AWG OFC tinned wire for the power and ground and I am starting to feel I should have bought some 4 AWG wire instead :/.My questions are will I get by with this gauge wire for power and ground and what fuse should I buy?? Sorry for this, this is my first install and am unfortunately really struggling lmao. Thanks</blockquote>

[QUOTE="ItsMixedUp, post: 8737299, member: 682413"] So I was gifted a sub off a mate which runs at 250W @ 4 ohms and just bought an amp, the amp is a Juice Ja1201d 1200W peak (I don't believe this rating lol), rms 480W @ 1 ohm, 380W @ 2 ohm and 225W @ 4 ohm. It has a 50A fuse on it. I was trying to do some math to figure out what fuse I needed from the battery but I am struggling to find out what figure to use. If I use the supposedly peak power figure I do 1200/0.8 then 1500/13.8 is 110A which is way above the 50A on the amp this is why I don't believe this rating. If I do the 480W @ 1 ohm then this works out to be about 43A which is closer to the 50A on the amp. Should I buy a fuse which is 30% bigger then the one on the amp? (this is what it recommends). Also I just bought some 8 AWG OFC tinned wire for the power and ground and I am starting to feel I should have bought some 4 AWG wire instead :/. My questions are will I get by with this gauge wire for power and ground and what fuse should I buy?? Sorry for this, this is my first install and am unfortunately really struggling lmao. Thanks [/QUOTE]

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