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Old 06-07-2011, 09:07 PM
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Default 4th order for a dc audio lvl2 8

Was planning on doing a box for 2 but those planes went out the window was hopeing someone here could help me design one or design it for me wanting to use a 4 in flared aeroport The box will be goin in the trubk of a saturn sl1 probably can do no more then 12x30x40 looking at good response for lows and mids
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Old 06-08-2011, 01:04 AM
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i pretty much just need to know the size for the sealed and ported sections sub will be mounted with the magnet on the ported side
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Old 06-08-2011, 01:05 AM
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also the tuning been looking around and seeing 40hz
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Old 06-08-2011, 01:06 AM
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i was told .3 sealed and around .75 ported per when i had my 4 sundown sa-8's. not sure how close they are as far as boxes go, but figured id throw it in there. tuning, 45 is what you'll hear in most cases for an all around 4th.
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Old 06-08-2011, 01:40 AM
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should i just use the sealed and ported volumes from there website? i wanna get it rite so i dont eff up my sub. also is poly fill for the sealed a good idea?
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Old 06-08-2011, 06:40 AM
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i did a 2 lvl2 8 box for my boss we did .3 per sealed and 1.2 after disp ported. around 48-50hz tuning should be just fine for what your looking for. we did use a 6" round port. hardest part is getting the port in such a small box so you end up with an external port most of the time. he also has an orion 1500 @.5ohm on them and they love it power wise, although i did have to recone after the power/lows/box tuning at the time tore the neck joint apart reconed and expoied the neck joints and no more issues.
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Old 06-09-2011, 06:42 AM
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To get a flat response, your front chamber will be smaller. To get an acceptable response, your front chamber will be about the same. To get a huge ripple/dip in response that apparently everyone likes so much, make it larger. Just dont ***** to me when its got a swoopy response that sounds like ass.

And the only reason I know this is because Ive ran numbers for the lvl2s.
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