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by **Jonathan** » Sun Jan 29, 2006 7:10 pm

Transmission line enclosures are excellent for SQ as well. A well designed ported box can outdo sealed IMO, with ported you can control the level of damping at resonance, something you can't do with sealed. You just don't get the benefits in group delay that AP and TL offer you. Infinite baffle (or dipole) is great, too.

by **GlassWolf** » Sun Jan 29, 2006 6:15 pm

that's about it.
I use two RE XXX 12" in an AP box in my car.
each sub gets ~1300 watts.

more on AP boxes:
http://www.elitecaraudio.com/article.php?sid=18
http://www.maximacar.com/aperiodic.htm

by **stephensmia** » Sun Jan 29, 2006 9:37 am

ok so everything I've read so far says they are perfect for SQ but a pain in the a$$ to build and an even bigger pain to tune.

by **stephensmia** » Sun Jan 29, 2006 9:11 am

Some of what I found

Aperiodic
Aperiodic enclosures utilize an external membrane to dampen the woofer and flatten out the impedance curve of the
enclosure.
Pro's: extremely small enclosures, very flat response, excellent low extension.
Cons: low efficiency, usually needs large subwoofers to perform, EXTREMELEY difficult to design and tune properly.

by **stephensmia** » Sun Jan 29, 2006 9:07 am

Ok, now thats a new word please explain.(I'm searching yahoo as we speak)

by **GlassWolf** » Sun Jan 29, 2006 8:23 am

no second and third order harmonic control with straight sealed. They get boomy as you go up in frequency.
If you want SQ, go aperiodic.

by **stephensmia** » Sun Jan 29, 2006 7:15 am

[quote="KikiTheCat"]stephansmai]
You're right. It is good but I like sealed enclosures. I think they are so much better for SQ and thats what I'm into.

by **JeremyC** » Sat Jan 28, 2006 9:37 pm

Mithrandir wrote:not to hijack a thread but can having subs faced towards you instead of at the trunk totally eliminate a frequency because certain bass notes are like they arent even there, unless I open my trunk. My subs face the front of my car

Thats called cancelation. With the subs firing forward some of the freq are bouncing of the back wall and then mixing with the sound waves comming of the front of the sub. The best way to stop it is to seal of the front of the box (subs) from the rest of the trunk.

You could also try some diffrent box positions and see what helps.

http://www.caraudiocentral.net/forums/s ... .php?t=233

by **Mithrandir** » Sat Jan 28, 2006 9:04 pm

not to hijack a thread but can having subs faced towards you instead of at the trunk totally eliminate a frequency because certain bass notes are like they arent even there, unless I open my trunk. My subs face the front of my car

by **Darthness** » Sat Jan 28, 2006 8:55 pm

6: Drilling a hole in a box makes it ported

l.m.a.o

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