bang for the buck. mach5 all the way. theyre as good/maybe better than type R's, and Fi X, Re Re, alot of other subs and cost more than half the price. amazing. i got one 12" mach5, once i get a 2ohm stable amp ill be good, i killed my amp pushing the maw in paralell and my amp couldnt sustain the 2ohm load. but that one 12 had amazing spl and SQ. i bet i was close to 140's with my one maw12, and that was in a prefab sealed box. consider the numbers ill get after i get a stable amp and a ported box tuned. OMG! lol.. im using no subs right now.. why even bother. if i cant use my maw to its fullest potential, im not going to wear it out on ******** wattage. i had it running on 2ohms for about an hour and holy **** did it ****ing thump. my wifes hair was starting to move from the air movement from the bass. but... thats my bang for the buck. if u got money for some L7 Kickers go for it