i wish i had that kind boom back in high school my truck hits 150db bro, this isn't a high school project it's a competition truck that has won me many o trophies for SPL and SQ

 

Dang

What amp are you running and what options did you get with the BTL?

 

looks like a T2000

 

anyone remember the 18" xxx I had floating around for like a year?

 

I do styx.
Sheez I know who Bryan is. Yall missed all of the good stuff in the beginning audio wise. I've been here longer than alls of ya.

 

150 on a meter, 18s, pickup trucks, and SQ don't usually mix well. What did you have for speakers/amps/HU? Must've been pretty impressive.

 

SPL i can understand, looks to be the whole point of doing that. But SQ trophies with that setup? Enlighten me.

You must have some serious port noise too.

 

x2 on noise - that is nowhere near the amount of port you need for a box/driver that big. And SQ and ghetto setups don't usually happen...

Also throw more power on that BTL.

 

X100 on noise! Its actually not helping at all having a port that small.

18" driver needs approx 81-85 square inches of port. (For 1 driver).

 

I remember needing a 10 cube box and 120 sq in of port... ya eff that

 

If this is truly an SPL setup, there should be like 200 plus sq in of port, walled off or at the very least not sitting on the effing seat. And I hate to break it to you but your probably not hitting 150s with a single 18 in a relatively small box with too little port and only 2k. Also no apparent deadening.

 

i got my single 12 hitting 140 db but as far as sq it sucks in all the boxes ive tried.

 

That's not that impressive FYI.

Unless you're doing it at like 20 Hz, or with an XPlod off 200 RMS, or a heavily deadened trunk car.

 

2 JBL 8's doing a 162 on dash is impressive.

 

That is pretty incredible, but I don't think JBL ever made an 8 that took over 300 RMS...so unless that score is at like 70 Hz or on a meter with adjustable sensitivity I'm gonna have to call BS - but hey you could be right.

Its tough to break 150 with 2 1508s on 2-4k RMS at 40-50 Hz. And while they may not be great SQ woofers they're one of, if not the loudest 8 inch driver.