pair pair 10's vs. single 15 or bigger, playing lowwww
08-09-2008, 10:47 PM
#1
pair pair 10's vs. single 15 or bigger, playing lowwww
ok, so what is the magic to loud and low?
space is at a premium in my car and im looking for a flat frequency response to 20Hz but i also what stupid loud.
this isn't possible right? i have to pick one or the other?
i currently have a pair 10" perfects in a sealed box running off 1000W RMS and am thinking of going for a single 15" or bigger, (JBL GTI? RE?)
however according to my math (Pi*d) the pair 10's have more cone area than a 15, sooo that means my current set up would play both louder and lower?
i don't have room for a ported box tuned to SQ frequencies (10-30Hz) i just built a sub for my room tuned to 25 Hz and the port was like 3 feet long or something ridiculous, i know for more boooooooom i could port to 40-50Hz but then i get no bass below that because then i have to high-pass at pretty much the tuned frequency to avoid over excursion, unlesss i can just EQ the volume down below tuning frequency? i dunno, also, i have near limitless tunning/EQing available, running a carputer.
the only other option i have thought up is to have 2 subs in different boxes with one for sq and the other ported for SPL that i can turn on/off at will, but that requires more room
more system specs:
3 way front stage with 8's 4's and tweet
space is at a premium in my car and im looking for a flat frequency response to 20Hz but i also what stupid loud.
this isn't possible right? i have to pick one or the other?
i currently have a pair 10" perfects in a sealed box running off 1000W RMS and am thinking of going for a single 15" or bigger, (JBL GTI? RE?)
however according to my math (Pi*d) the pair 10's have more cone area than a 15, sooo that means my current set up would play both louder and lower?
i don't have room for a ported box tuned to SQ frequencies (10-30Hz) i just built a sub for my room tuned to 25 Hz and the port was like 3 feet long or something ridiculous, i know for more boooooooom i could port to 40-50Hz but then i get no bass below that because then i have to high-pass at pretty much the tuned frequency to avoid over excursion, unlesss i can just EQ the volume down below tuning frequency? i dunno, also, i have near limitless tunning/EQing available, running a carputer.
the only other option i have thought up is to have 2 subs in different boxes with one for sq and the other ported for SPL that i can turn on/off at will, but that requires more room
more system specs:
3 way front stage with 8's 4's and tweet
08-09-2008, 11:06 PM
#2
Well, first off I think you've gotta check your formula for cone area... The 15 will have more area (Pi*r^2) = 176.6in^2 vs. 157in^2.
You can build a ported box with a vent tuned nice and low with only a few cubic feet, just play with the volume of the box and the area of the port until you get a port length that works for you - you can always bend the port and make an "L" in the box as well to gain length.
If you want something low and loud, perhaps you should shoot for about 35 hz. If you tune up to 40 or 50 hz, all you'll have is a fart box that's painful to the ears with no bottom-end. 35 hz will give a nice mix of low and loud I'd say, if done with enough net volume. How much space do you have? Do the 15".
You can build a ported box with a vent tuned nice and low with only a few cubic feet, just play with the volume of the box and the area of the port until you get a port length that works for you - you can always bend the port and make an "L" in the box as well to gain length.
If you want something low and loud, perhaps you should shoot for about 35 hz. If you tune up to 40 or 50 hz, all you'll have is a fart box that's painful to the ears with no bottom-end. 35 hz will give a nice mix of low and loud I'd say, if done with enough net volume. How much space do you have? Do the 15".
08-10-2008, 12:07 AM
#4
from the manuals, the JBL w 15 gti has an SD (radiating area of the cone) of .839 square ft, compared to .344 for a perfect 10". The two 10's = .688 square ft, which gives the JBL 1.22 times the radiating area of 2 perfect 10's. That coupled with it's greater excursion (20.32 mm vs 16.75 mm for the perfects), makes the JBL potentially move more air. The JBL's can also handle serious power 750 rms (very underated) and 5000 peak. I've personally seen them handle 2000 plus watts rms for long periods of time with nothing but hard hitting, deep, articulate bass. Excellent sub! The Perfects are also excellent, great SQ, but more for a moderately loud set up.
08-10-2008, 11:50 AM
#6
Go single 15.
I had 4-5 different dual 10's setups and sigle 15 in a good box wins every single time for lows.
But you dont wat 20hz. You want 32hz.
if you go too low yuu will lose high's and loudness completely
Middle ground I found was 32hz
Good luck
I had 4-5 different dual 10's setups and sigle 15 in a good box wins every single time for lows.
But you dont wat 20hz. You want 32hz.
if you go too low yuu will lose high's and loudness completely
Middle ground I found was 32hz
Good luck
08-10-2008, 05:46 PM
#7
im going to run the sub at 3 ohm off a zapco 1100.1, could use a bit more power i presume, but we shall see, the sub only needs to play 20 to 65/70Hz for the most part, i think i was going to try and cram it in a sealed box, but you are saying ported tuned low (30Hz?) can i still feed it signal to 22ish Hz?
and wow, i really really picked the wrong equation, oh won't school be fun again in the fall
and wow, i really really picked the wrong equation, oh won't school be fun again in the fall
08-10-2008, 08:19 PM
#8
Put the subsonic at box tuning frequency and it will probably sound better as it rolls off, if your 20-30hz is louder than your 30-40hz, it might sound too bottom heavy (like most sealed boxes), if you have a woofer that has good excursion, go ahead and put the subsonic 5-10hz lower, why not if the suspension can handle it. A sealed box is a good idea, you might need more power, 3 ohms off 1100W amp sounds like, 450W getting to the sub? I havn't heard a rap song yet that my XXX at 36ish couldn't belt out on RMS. It doesn't really matter if you use 2 10's or 1 15, the 10s will be faster and the 15 will go deeper and have a stronger lower octave sound. If you want RE, also look at Fi. What music do you listen to? If you only listen to rap tune from 32 to 35hz, it might come down to how much space you have. I'd like to hear what 4 sealed 12's sound like, I had 2sharing 1000W and they had zero high end, but on the intro of 'sippin sizzurp' they came alive for about 5 seconds, so they were too bottom heavy, but 4 of them would probably give decent highs and crazy lows.
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