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<blockquote data-quote="kross" data-source="post: 3421893" data-attributes="member: 577729">I see several things wrong:1. That amp is a Class AB 2-channel amp.&nbsp; Class AB amps aren&#039;t very efficient.&nbsp; To be conservative, let&#039;s say it&#039;s 50% efficient.&nbsp; Some are 60%, but we don&#039;t know what this one is.&nbsp; So with 50% efficiency, if the amp is putting out 800w to the speakers, it&#039;s drawing 1600w from the power wire.&nbsp; 1600 watts at 13.8 volts is 116 amps.2. 116 amps is obviously a lot higher than the current fuse you have in there.&nbsp; You need a fuse of about 120 amps.&nbsp; But this brings me to #3:3. 8 gauge wire cannot carry 120 amps.&nbsp; You need at least 4 gauge.&nbsp; You should run 1/0 gauge, so that you can run an amp for your speakers, too, in addition to your sub.&nbsp; Make sure you use the same size for your ground as you do for your power wire.4. You say you wired your sub to 1 ohm.&nbsp; That amp, when bridged, is rated for 4 ohms.&nbsp; Not 2 ohms.&nbsp; Certainly not 1 ohm.&nbsp; Rewire for 4 ohms.Hope this helps!-- Kevin</blockquote>

[QUOTE="kross, post: 3421893, member: 577729"] I see several things wrong: 1. That amp is a Class AB 2-channel amp. Class AB amps aren't very efficient. To be conservative, let's say it's 50% efficient. Some are 60%, but we don't know what this one is. So with 50% efficiency, if the amp is putting out 800w to the speakers, it's drawing 1600w from the power wire. 1600 watts at 13.8 volts is 116 amps. 2. 116 amps is obviously a lot higher than the current fuse you have in there. You need a fuse of about 120 amps. But this brings me to #3: 3. 8 gauge wire cannot carry 120 amps. You need at least 4 gauge. You should run 1/0 gauge, so that you can run an amp for your speakers, too, in addition to your sub. Make sure you use the same size for your ground as you do for your power wire. 4. You say you wired your sub to 1 ohm. That amp, when bridged, is rated for 4 ohms. Not 2 ohms. Certainly not 1 ohm. Rewire for 4 ohms. Hope this helps! -- Kevin [/QUOTE]

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