Well, I haven't procured the Kicker 6.5" sub yet, but soon, hopefully. I will run several tests again to measure it's effectiveness at different frequencies and report it back here.
I had a couple of comments on some of the other posts here. As far as subs go, I agree with most of these posts, bigger is better. Obviously the bigger the woofer and the more power put to it, the louder it gets. Sub frequencies need subwoofers that move air. The more air they move, the more bass you get. So, a single 6.5" sub is not going to move as much air as a 15" sub(but if you compare one 15" to four 6.5" subs you would be surprised)! BUT, subwoofer boxes play a critical role in sub efficiency. Especially ported or "bandpass" boxes. The exact placement and length of these ports or tubes make a huge difference in the efficiency of the sub by making the box and port resonate at the lower frequencies. Basically, you can get the greatest sub in the world, but if you don't have a great box to put it in, it won't sound as good as it should.
By the way, on a side note, the "premium" JBL system in my '97 surprised me. I took off one door panel last week to see what kind of speaker was in the doors and lo and behold it is a 6x8 with a wizzer cone!!!! That is the cheapest and the worst sounding way to generate sound with a speaker!!!! I expected to see at least a 2 way (woofer and tweeter separate) with what I paid for that extra option, but noooo, they put in cheapies!!!! The biggest problem with this type speaker is that the wizzer loses effectiveness after a short amount of time of being subjected to heat (which builds up rather nicely in parked vehicles). I already hear a difference in my 2 year old vehicle! They'll be on there way out very shortly...
Pacman
