I want to say that 72impala ran them in like 12 cubes net with dual 12" aero's. Lower tuning was 29 and upper tuning was 42. They sounded really good on music even though they wasn't suppose to. They were also taking a crossfire xs8k daily. Hope this helps you.
(2015 MECA Street 3 World Champion)
2004 Dodge Ram Single Cab 1500
3 Incriminator Audio Judge 15s
3.25:1 Ratio 4th Order Blowthrough
1 x AA 9.0 TFHE, 2 x AA 150.4
4 X Crossfire XS-M8's, 2 x PRV Tweets