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C3 Customs
11-27-2008, 05:04 PM
Does anyone on here build them or has built one in the past? I am looking into building few any tips?

DBBOOM
11-27-2008, 05:09 PM
Alan Dante on Termpro, or www.PWKDesigns.com

C3 Customs
11-27-2008, 05:18 PM
Alan Dante on Termpro, or www.PWKDesigns.com

Interesting read....I like the design and his pictures did help I will post pictures and analysis when I finish...any more tips would be greatly appreciated...

DBBOOM
11-27-2008, 05:19 PM
Interesting read....I like the design and his pictures did help I will post pictures and analysis when I finish...any more tips would be greatly appreciated...

www.carstereo.com has some brief discussions on them also.

IDSkoT
11-27-2008, 05:24 PM
I can design them... but the output is very limited and only in specific ranges.
Very much unlike ported boxes, after their tuned frequency, their output drastically is lowered. That's why many people just use ported. Although, if designed right, the output at the tuned frequency is much better than a ported box... but like I said, for daily listening, they're pretty poor.

C3 Customs
11-27-2008, 05:27 PM
Thank you very much, if I run into any complications I will let you know...

mjf
11-27-2008, 05:28 PM
I can design them... but the output is very limited and only in specific ranges.
Very much unlike ported boxes, after their tuned frequency, their output drastically is lowered. That's why many people just use ported. Although, if designed right, the output at the tuned frequency is much better than a ported box... but like I said, for daily listening, they're pretty poor.

a parallel 6th order can actually play music well if designed properly, you just need a sub suited to an almost free air application, similar to the specs of a sub suited to a tline.

since a 6th order in that sense is effectively just two ported boxes stacked on each side, it would just be a matter of make one side pick up where the other drops off.

IDSkoT
11-27-2008, 05:50 PM
a parallel 6th order can actually play music well if designed properly, you just need a sub suited to an almost free air application, similar to the specs of a sub suited to a tline.

since a 6th order in that sense is effectively just two ported boxes stacked on each side, it would just be a matter of make one side pick up where the other drops off.



Very true. Generally speaking, though, most subs aren't that well suited for BP and T-line enclosures, as well as IB set-ups. Especially on this forum, which the biggest, fattest, dopest magnet/basket combo gets people harder than calculus... I view this forum as the SPL forum and DIYMA as the SQ forum. Haha.

GAM3OVR
11-27-2008, 05:54 PM
This may sound ghey to some of you, but I had 2 Audiobahn 12's in a bandpass in the trunk of a civic and it sounded really really good and loud on music. Really.

which bandpass design was it though?

DBBOOM
11-27-2008, 05:55 PM
Probably a fifth order.

IDSkoT
11-27-2008, 05:56 PM
Probably a fifth order.

I hope you're kidding. :crap:

DBBOOM
11-27-2008, 05:57 PM
I hope you're kidding. :crap:

Forgot to put this:rolleyes:, sorry.

Random1010
11-27-2008, 06:05 PM
4th order

IDSkoT
11-27-2008, 06:05 PM
UH...

1 common sealed chamber for the front of the cones and seperate ported chambers for the rear (where the motor goes) w/ 2-4" ports on the vented sides

I thought 6th order meant all bandpass designs..Sorry

An inverted 4th order. lolz.

To clear it up...

4th order is when there are 2 chambers, and one chamber is ported.

6th order is when both chambers are ported.

Rashaddd
11-27-2008, 06:11 PM
6th order bandpasses can actually have very flat and wide bandwidths, its all in how you design them, and the sub that you are using. This concept applies to every kind of speaker enclosure, in that both the driver and the way it is designed are the biggest factors in what kind of response you are going to get. There is nothing inherent about a 6th order parallel tuned bandpass that will make it ****** on music or lack bandwidth.

Pioneer~Saturn
11-27-2008, 09:43 PM
Probably a fifth order.

5th order ftmfw! :D

chinobling831
11-27-2008, 11:39 PM
i have a 6th order in my s10 with 2 12's. it was designed by fallen at rcb enclosures and built by me. like many have said here if designed properly output will be awesome. oh and did i mention that the 12's are some 8 year old audiobahns!! and im only throwing 200 watts a piece. it gets decent loud.

Immacomputer
11-28-2008, 11:23 AM
There is nothing inherent about a 6th order parallel tuned bandpass that will make it ****** on music or lack bandwidth.

Well the group delay of the higher frequency ports can make them sound not very musical. The 6th order I built had a pretty flat response and pretty decent range but sounded pretty muddy on complex bass tracks on some bluegrass I was listening to. This will vary on design and driver but there really isn't a way to avoid a pretty high group delay in the 50-80hz range.

thch
11-28-2008, 12:34 PM
if that's your issue, i suggest reducing Qa. possibly by adding stuffing. next, ensure the resonance is out of band and not excessive. seems like a logical thing to do at least.

80INCHES
11-28-2008, 01:05 PM
box types

1st order(free air)
2nd order(sealed)
3rd order(ported)
4th order(bandpass with 1 sealed chamber playing into 1 ported chamber)
5th order(4th order bandpass with a low pass filter)
6th order parallel tuned(bandpass with the rear chamber ported while the sub is playing into another ported chamber...both ports are seen)
6th order series tuned(bandpass with the rear chamber ported playing into a front ported chamber...one one port is seen and its fron the front chamber)
7th order(bandpass with the rear chamber using a passive radar while the sub is playing into a ported chamber..only the passive radar and the front chamber port are seen)
8th order( bandpass with both the front and rear chamber ported and both ports playing into another ported chamber...only 1 port is seen but theres 3 ports all 2gether)

80

Rashaddd
11-28-2008, 01:11 PM
Well the group delay of the higher frequency ports can make them sound not very musical. The 6th order I built had a pretty flat response and pretty decent range but sounded pretty muddy on complex bass tracks on some bluegrass I was listening to. This will vary on design and driver but there really isn't a way to avoid a pretty high group delay in the 50-80hz range.

Ahh yes, was just thinking in terms of output, thanks