Quick question - ported box.

[S(Q)PL]

Hi guys. I'll be building a ported box for 2 audiobahn 10" this weekend, and I have a question. The Vas for this particular sub is .85 cuft, displacement is .10, which gives .95cuft per chamber. Since I'm porting this box, should I increase the cuft per chamber? Would appreciate some numbers . Also, this box will be for SPL, tuned at 40-45hz. Round or Square ports, which would be better?

thanks,

Rick

[BassBoomer]

the bigger the box the better for ported boxes.

[S(Q)PL]

ok, thanks for the reply. Any suggestions on how many cuft per chamber?

[Wonderbread]

vas is not a number you want to be looking at, unless you know what it means, and how to implement it alongside the other T/S parameters...
which audiobahn drivers are you talking about..
give me model numbers and year.

[S(Q)PL]

The model - AW100Q

Year - 2002


Thanks

[Wonderbread]

try 1.6 cubes before the drivers displacement, but after the port displacement... tune to 33 hz, and use a common chamber...

[S(Q)PL]

Just to be clear, 1.6 cuft total volume, or per sub? 33hz would be right for an SPL box?
Seems I was way off, but thats why we seek advice from those that know . One last thing, just out of pure curiosity, why use a common chamber?

[Wonderbread]

per sub...
that's a little low for a pure SPL box, but a good spot to use for a daily driver to get them loud.
use a common chamber because it's the only way to make sure you ahve them both tuned to teh same spot...

[S(Q)PL]

Wonderbread - thank you sir for the help . I'm planning to use 2 3"dia round ports, proper length for 33hz... that ok?

[Wonderbread]

should be ok...
im a fan of teh slot port, but it should be fine...

[S(Q)PL]

hmmm now that you mention it, a slot port would be easier with a common chamber. I'll look into that. If it's within my ability, I'll go for it. Thanks again.

[Wonderbread]

no problem.

[S(Q)PL]

Just an update..... Box is built, ports are tuned, subs installed, and to be honest, I'm impressed. These are low end audiobahns, and the general consensus is they **** for SQ, but they're not half bad. On the SPL side of things, they are LOUD, VERY LOUD. I didn't expect this, but hey, it's a nice surprise. I'm really VERY picky about my mids/highs, but I'm fairly easy to please on the low end.

I'm going to credit the recommendations from Wonderbread (and the nice gain from my jeep cherokee ) for this awesome success. Thank you very much, Wonderbread

[Wonderbread]

no problem...
its good to be appreciated once in a while... most of the time im dead wrong, so this time i'm very happy with myself... go team! lol
PS - we would all like to see pics if you can get some!