How do I tune my Concept Amplifier

    Hi, I have four downfireing Diamond Audio 12's, dual voice coil, 400rms/800peak, with a Concept HP-1500, that does 1800 watts rms at 1ohm. There is no back seat in my truck, I custom built my box with 1.5 cu. ft. per chamber, sealed. I have a 99 Ford F-150 Extended Cab with an Alpine cd player, and an extra battery.  I listen to all kinds of music, (mostly rap), but i want my system to be the loudest it can possibly be. I have spent numerous hours and money on my truck, and have installed everything: door speakers, subs, amps, cd player, tweeters, the works. I have well over three grand in my system alone and want it to blow my head off, so i hope you can help me. I was wondering what to set my controls on my amp to.  Where should i set my Level, Sub-Sonic, LPF, Base Boost, and Phase Shift?

Thanks!

Welcome.  It's pretty evident that you've been bit by the bug like most of us- this is an expensive hobby.  Anyway, I recommend doing seperate searches (top right corner) in here on different topics: gain setting, crossovers, bass boost, etc.  This place is a wealth of knowledge if you know where to look.

if the amp is just for the subs, turn the bass and volume all the way up on your headunit, then slowly turn each knob on the amp seperately, paying very close attention to the sub.  Each controll will sound better as you turn one way, and worse as you go the other, but there will be a definate point where there will be a huge leap from unpleasant to terrible sounding.  Turn it to just below this point. Do this for all of them, then set your headunit to how you would typically listen to it, and it will sound right.  This isn't the BEST way to tune it, but it will get you in the ballpark.  You can fine tune it as you go.