Dont know what you mean by not being able to make overpowering bass...actually mtx makes some killer subs....the thunder series were some of the best subs they ever made.
kicker cvr's are more in line with the thunder series.
I know for a fact two 7500's hit harder than an L7.
And a single 9500 in a ported box tuned to 35hz will pound your eardrums.
Unless youre referring to the newest mtx subs....i dont like those at all.
YouTube - bumpin with mtx 9500's
YouTube - 4 MTX 9500 12's
best line of subs mtx ever made
Holy crap, they should be illegal !
That is some extremeeeee bass. What's all these square subs about ? they can't be good acoustically...
Woah: YouTube - 20,000 watt window shake - Tremendous Bass #15
And heh, this actually from as much as i can tell, sounds good ! YouTube - Escalade 30,000 Watts Groundpounder+Good SQ Eagles Hotel Cal