POS carb
05-24-2004, 12:00 PM
I was wondering what everyones setup for boom is...
I found one of the loudest setups is when I had my 2 12s in a ported box up against the trunklid but this was kind of annoying due to the lost trunk space. It was a single chamber with 3 14" long ports and a volume of about 3.5 cubic feet. It got down too but it was a lot quieter outside the car
Right now I have 2 15's facing back in a sealed chamber. It's loud, it makes your eyeballs shake but it doesn't drop down low like my 12 did, if anything they should be rocking like 20 hz no problem. I think it has to do with the box, it's only 1.3 cubic feet per sub, individual chambers, sealed. It helped when I stuffed it with polyester fill (2 lbs) but still, I'm wondering if a bigger box would fix this. The 15's sound great overall, very tight, defined bass, I was very surprised. Also the box is a little smaller than the one for my 2 12's so I get a lot of trunk space.
The factory specs are:
sealed 1.25 ft3 box for SQ or 1.75 for SPL each sub
ported was some obscene ammount like 5 cubic feet per sub but I guess that shit would be heard from 5 blocks ionside a bigass Yukon or something
Some questions to ponder:
What difference would it make acoustically if I were to simply create a single chamber of 2x the volume... is this something that would work? I'm not sure how the box affects the sound coming out the front in a sealed box setup but I guess it has to do with wavelength and cone control (inside pressure) and if it's 1 giant camber with 2 15's pushing it, I dunno, I'm guessing the box will handle lower frequencies better but maybe create too much pressure inside? It worked badass for my 2 12's, I only went to a single chamber once when I tried it out in my friend's 2 chamber sealed box and I wasn't too impressed.
If the rear of the trunk (woofer cones facing back w/ the cones close to the tag) offeres the loudest sound (cancelling waves or something?) what would be the next best? I'm looking for what worked for you! Let us know, o and if you have any REAL dB readings let us have em! When I had the cones facing the back seat it used to rock hard but only w/ the seat down! :(
Right now I have the 2 15's in a sealed box running 500 watts each and it's enough to make the mirror start turning (the 12's never did that!) and make evey screw on the carb come loose every 2 weeks. I just wish it would drop down a little lower frequency, it seems to muffle out like @ or below 40 hz.
Is there a [cough, free] program available that can be used to measure RTA?
Is the Accord any good for low frequencies? I may be better off with 4 10's, no?! :rockon:
I found one of the loudest setups is when I had my 2 12s in a ported box up against the trunklid but this was kind of annoying due to the lost trunk space. It was a single chamber with 3 14" long ports and a volume of about 3.5 cubic feet. It got down too but it was a lot quieter outside the car
Right now I have 2 15's facing back in a sealed chamber. It's loud, it makes your eyeballs shake but it doesn't drop down low like my 12 did, if anything they should be rocking like 20 hz no problem. I think it has to do with the box, it's only 1.3 cubic feet per sub, individual chambers, sealed. It helped when I stuffed it with polyester fill (2 lbs) but still, I'm wondering if a bigger box would fix this. The 15's sound great overall, very tight, defined bass, I was very surprised. Also the box is a little smaller than the one for my 2 12's so I get a lot of trunk space.
The factory specs are:
sealed 1.25 ft3 box for SQ or 1.75 for SPL each sub
ported was some obscene ammount like 5 cubic feet per sub but I guess that shit would be heard from 5 blocks ionside a bigass Yukon or something
Some questions to ponder:
What difference would it make acoustically if I were to simply create a single chamber of 2x the volume... is this something that would work? I'm not sure how the box affects the sound coming out the front in a sealed box setup but I guess it has to do with wavelength and cone control (inside pressure) and if it's 1 giant camber with 2 15's pushing it, I dunno, I'm guessing the box will handle lower frequencies better but maybe create too much pressure inside? It worked badass for my 2 12's, I only went to a single chamber once when I tried it out in my friend's 2 chamber sealed box and I wasn't too impressed.
If the rear of the trunk (woofer cones facing back w/ the cones close to the tag) offeres the loudest sound (cancelling waves or something?) what would be the next best? I'm looking for what worked for you! Let us know, o and if you have any REAL dB readings let us have em! When I had the cones facing the back seat it used to rock hard but only w/ the seat down! :(
Right now I have the 2 15's in a sealed box running 500 watts each and it's enough to make the mirror start turning (the 12's never did that!) and make evey screw on the carb come loose every 2 weeks. I just wish it would drop down a little lower frequency, it seems to muffle out like @ or below 40 hz.
Is there a [cough, free] program available that can be used to measure RTA?
Is the Accord any good for low frequencies? I may be better off with 4 10's, no?! :rockon: