Brands, what do you carry and why?

Did you feed them perfectly with the perfect power? mtx amps are very power hungry and if you don't give them the right power and you play it at high volume you can smoke them  easily, and that's not perfect.

Unfortunately he is basing this on a marketing paper MTX wrote, which is pure BS.  They describe "benifits" their subs have without disclosing the consequences of those design choices.  You see, speaker engineering is a practice of compromises.  You choose one feature, but are forced to compromise elsewhere.  for instance MTX claims to utilize a smaller enclosure requirement.  However Hoffman's Iron Law states that if you choose to use a smaller enclosure, you must give up either efficiency or low frequency extention.  Also, they are comparing manufacturer suggested enclosure sizes, which MTX always rates way too small.  Comparing the two subs in a sealed enclosure with an identical Qtc shows that the JL sub actually requires an enclosure less than half the size.  Another example of the compromises is the voice coil diameter.  Sure having the larger diameter voice coil helps for power handling.  However it also means more moving mass to deal with, as well as a higher inductance which produces more distortion.  I personally would much rather have a W7 any day of the week.  However, as Rob suggests, the 9500 may actually be better for someone else.  So it would still be a good woofer to offer to customers.

yeah guys 1-0m wire perfect bolted ground upgrades to all underhood wires. i've been installing since 1981 it was right. plus i talked to some other guys that had the same problems. but i'm not saying mtx bites i'm just saying it's not my fave right now.