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<blockquote data-quote="Goldenknob" data-source="post: 956808" data-attributes="member: 561030">what we did (me and btmorris) we first gave it a nice fat 4 guage ground cable, from my smaller 14 guage.&nbsp; then played the 45hz test tone with no speakers hooked up to the sub amp, engine running.. my head unit was at 60/80 with bass and treble flat 0, had the crossover at halfway for the subs.&nbsp; was only getting about 17volts with the gain all the way up.. so we turned the crossover gain knob up to about 3/4 and the voltage shot up to about 50 or 60.. so we then turned the gain down..&nbsp; we ended up with the gain at about 3/4 on the amp and the gain on the crossover at full with the boost on the crossover at 3/4 and the freq at 80 and below.&nbsp; this setting achieved a voltage of 31.6 out of one channel of the amp.to make sure we did the formula rightSqrt(2*500)= 31.6since I only have one gain knob then this set both channels for each sub..as stated by others.. it did seem a bit quieter, but with a tiny adjustment up to 66/80 it got plenty loud.and I left freedom to be able to adjust the crossover gains a little higher at a lower volume if I want more bass and less mids and highs.</blockquote>

[QUOTE="Goldenknob, post: 956808, member: 561030"] what we did (me and btmorris) we first gave it a nice fat 4 guage ground cable, from my smaller 14 guage. then played the 45hz test tone with no speakers hooked up to the sub amp, engine running.. my head unit was at 60/80 with bass and treble flat 0, had the crossover at halfway for the subs. was only getting about 17volts with the gain all the way up.. so we turned the crossover gain knob up to about 3/4 and the voltage shot up to about 50 or 60.. so we then turned the gain down.. we ended up with the gain at about 3/4 on the amp and the gain on the crossover at full with the boost on the crossover at 3/4 and the freq at 80 and below. this setting achieved a voltage of 31.6 out of one channel of the amp. to make sure we did the formula right Sqrt(2*500)= 31.6 since I only have one gain knob then this set both channels for each sub.. as stated by others.. it did seem a bit quieter, but with a tiny adjustment up to 66/80 it got plenty loud. and I left freedom to be able to adjust the crossover gains a little higher at a lower volume if I want more bass and less mids and highs. [/QUOTE]

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