I HAVE 4 15" DUAL COILS 2OHM L7 KICKER SUBS AND 2 HIFONICS BRUTUS 2200WATT AMPS MODEL BX22OOD AND THIS AMP IS STABLE TO PLAY AT A 1 OHM LOAD. I HAVE ALL THIS IN A 99 TAHOE, I ALSO HAVE A 15 FARAD CAP "THE CAP" AND A DUAL OPTIMA BATTERY THIS SET UP HIT HARD BUT I FEEL LIKE IT CAN DO WAY BETTER ANY ADVICE ON HOW TO HOOK UP THE SPEAKERS OR WHAT I CAN CHANGE TO IMPROVE THE PERFORMANCE ON THIS