In my sig.. at the bottom,,I placed, and ran for almost a complete year on each sub an Old School Autotek BTS 7050..Even at approx 3 years on some Old School USA MADE Cail. Made Audiobahn AW1008t pair of tens An Autotek Mean Machine 99,and for a solid year 4-AW1008t tens on two Autotek BTS 7150s(1 for ea set of subs).They arent all 4in coil subs, but they are all 1k rms and up subs, and those amps beat the Chit out of them on the daily.You give me 4 subs of a 4" coil walled up that will handle 2 ohms mono, and Ill bring my 99s, or 7150s, or 7300s and see if those old school amps will not push those subs?Or we can set up with Taylor Fade to run a test for us if he has the time?Or some onelse creditable.I trust my good friend on this Forum Spooney.?