i have this sub in a 1cuft box tuned to about 36hz and for now its running off an mtx 6500d at 2 ohms.(500 rms at 12.5v-612 on birthsheet)
i have to say that during the first 10 min. of playing time the 1508 sounded like total ***. as of now, i have one hour of playing time with the last 30 min. of time pushing it as hard as i could with the power at hand.
after the first 10 min or so it came to life really good(suspension had to loosen a bit)
now i allways expect a lot from a new driver and in this case i was quite suprised with this sub. right off the bat i can see where this sub will take a lot more power than it is rated. iam going to give it a week of play time and then switch amps to a mtx81000d.
sq is good(compaired to the 10w6v2 that was in there)but the "boom" factor is what its got really good. for a single 8", it gets quite loud and has no problem playing sub 40hz notes loudly for an 8".
so far iam farely impressed with it. ofter i get the larger amp installed, i will get it metered on a tl from a local shop.
fiy this is in a 85 full size bronco