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<blockquote data-quote="SunUpNeverdown" data-source="post: 8697344" data-attributes="member: 678573"><p>Go with 0 gauge and a 200 amp fuse if your electrical is gonna ever sit around 14 volts or more.&nbsp; That amp pulls a max of 170 amps and 4 gauge only supports 150 amps of current. But at 13 volts you should be fine with the 4 gauge wire and upgrade your fuse to a 150 amp fuse. If the rca pre outs on your head unit are 2.5 volts then it’s ok to have the amps gain 3/4s of the way up but your amp is probably 4 volt pre outs or 5 volt pre outs. For 4 volts have the gain a little below half and for 5 volts have the gain 1/3 of the way up. The higher the gain is turned up the lower the voltage is in the rca signal. If the rca signal calls for 4 volts and the gain is 3/4s of the way up around 2 volts then that creates clipping (a distorted signal). Distortion kills subs sooner or later. The gain doesn’t increase power/rms, it just for setting the voltage to match the head unit. Just because it sounds louder doesn’t mean it’s louder. That sound you hear that seems louder is a high frequency hum along with the bass note and it will kill your subs over a period of time. Some sooner, some later. Depends.</p></blockquote><p></p>

[QUOTE="SunUpNeverdown, post: 8697344, member: 678573"] Go with 0 gauge and a 200 amp fuse if your electrical is gonna ever sit around 14 volts or more. That amp pulls a max of 170 amps and 4 gauge only supports 150 amps of current. But at 13 volts you should be fine with the 4 gauge wire and upgrade your fuse to a 150 amp fuse. If the rca pre outs on your head unit are 2.5 volts then it’s ok to have the amps gain 3/4s of the way up but your amp is probably 4 volt pre outs or 5 volt pre outs. For 4 volts have the gain a little below half and for 5 volts have the gain 1/3 of the way up. The higher the gain is turned up the lower the voltage is in the rca signal. If the rca signal calls for 4 volts and the gain is 3/4s of the way up around 2 volts then that creates clipping (a distorted signal). Distortion kills subs sooner or later. The gain doesn’t increase power/rms, it just for setting the voltage to match the head unit. Just because it sounds louder doesn’t mean it’s louder. That sound you hear that seems louder is a high frequency hum along with the bass note and it will kill your subs over a period of time. Some sooner, some later. Depends. [/QUOTE]

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