4th order wall (3) xcon 15 alero aq3500d.1 - Car Audio Classifieds!
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Old 06-27-2012, 11:53 PM
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Default 4th order wall (3) xcon 15 alero aq3500d.1

update

ordered 2 dc level 3 18 d1's today

http://i.imgur.com/NfJqQ.jpg

Last edited by Lord Huggington; 07-06-2012 at 06:31 PM.
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Old 06-28-2012, 12:07 AM
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It could be 3 ported/1 sealed. The difference between ported isn't much at all (1dB) but the 4th order has a +6db peak at 36-37Hz when tuned to 40 Hz, it is the same as ported before 32 hz and after 45 hz (45 hz @ 0dB), 60 Hz @ -5dB. Would 1 cube sealed be choking it? Is 3 too small? 42.5 hz port tune = 0dB @ 50 hz w/3 & 1 cubes (more preferable if 2.5 & 1.5 is too low).

2.5 & 1.5 have a +4db peak over ported between 35-55 Hz.

I was told that bandpasses are distortion monsters. thats not true if you set it up properly, right? if you set the gains and the filters correctly how could you go wrong? do they not provide good lows down to 20hz or something and move a lot of air up top?
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Old 06-28-2012, 12:17 AM
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Will I even gain with a 4th order or should I just stick with 12 cubes @ 32.65 Hz (12" of port per cube/adjustable tuning)?
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Old 06-28-2012, 02:11 PM
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I'm tuned in, my room mate last year had an alero with a DC lvl 4XL trunk build
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Old 06-28-2012, 06:48 PM
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Looking for 3 15's wired to .8 or 2 18's wired to .5 for $600 local pick up. 2 dc level 3 18's are 800 shipped for me but i doubt theyll take the power!
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Old 06-28-2012, 07:04 PM
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how are you going to wire to .8ohms with 3 subs? 800 shipped for 2 lvl 3's sounds a little high.... I was able to get 1 lvl 4 12 for less than $400 shipped

http://www.stevemeadedesigns.com/boa...l-3-m2-12s-d4/

Last edited by crandis16; 06-28-2012 at 07:27 PM.
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Old 06-28-2012, 09:26 PM
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im pretty sure 3 wires into either .8 or 1.2, s4's though. probably going to go with 2 18 d2's anyways so i can do .5 ohm.
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Old 06-28-2012, 10:05 PM
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Quote:
Originally Posted by Lord Huggington View Post
im pretty sure 3 wires into either .8 or 1.2, s4's though. probably going to go with 2 18 d2's anyways so i can do .5 ohm.
.5ohms daily? or just for competition? From what I have heard from a lot of people, you shouldn't run your subs at .5ohms daily unless you have REALLY good electrical in your car. I would suggest getting 2 dual 4's and running them at 1ohm but that's just my personal preference
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Old 06-29-2012, 12:32 PM
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I'm doing .5 with a Singer 270 amp alt and 1 or 2 xs batts, it should be OK. The amp would actually only ever see .5 when the subs aren't moving, any other time because of box rise the amp will see about 1-2 ohms after rise anyways so it'll be okay. If I did 1 ohm than I'd still have rise up to like 3 ohms so .5 is fine for daily.

still need 2 18 d2's for $600.
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Old 07-05-2012, 05:13 AM
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I bought 2 DC Level 3 18 d1's for $640 shipped .
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