This is what I use for comps, it's a 12" Kicker CVX in a 1.75 cu ft box. SO far I've done four comps with this set up. I took three first places in Slapshow on the AC190 and one second place in USAC on the TL, the highest was 144.2 on the TL and 142.9 on the AC190. Not too bad for a single 12" sub getting 750 watts.