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Decipha
04-08-2005, 07:57 AM
I have 2 rockford fosgate P1 subs...

http://www.rockfordfosgate.com/products/ez2rockford/ModelInfo/ModelInfo.asp?ItemKey=10063597&CategoryDesc=Punch%20Subwoofers


At this moment, i have them in 2 LARGE sealed boxes that takes up my entire trunk. It sounds really good and i'm satisfied with it, but the boxes aren't mine and my friend that let me use them wants them back ASAP. So, I need a new box. I was thinking about building a bandpass box but i would like some recommendations on what size to make it. if any one can help i would really appreciate it. BTW, im feeding the subs 200 rms each and i would like them to pound as hard as they possibly can, i don't mind the loss of trunk space. TIA - all comments are appreciated.

timb2169
04-08-2005, 08:16 AM
Trust me buddy, a bandpass box will only cause you grief. I would recommend going ported. Going ported will allow you to tune accordinly to your musical preferences. If you like loud bass, then tune higher, like around 35 Hz. If you enjoy sound quality then go for tuning around 30 Hz.

Before you make a box I would recommend that you invest in some other types of subwoofers. Rockford Fosgate is decent, but there is alot better out there. Thre are plenty of people out there with Audiobahn and Fosgate. You should try some Adire Audio www.Adireaudio.com (http://www.adireaudio.com), or Resonant Engineering www.reaudio.com (http://www.reaudio.com).

A bandpass box will only allow you to here a certain frequency range with your bass. It will do it loudly but you can enjoy the frequency range with new subs.

If you have questions on brand selections, just go to Tmaudiousa (http://www.tmaudiousa.com) and check out the "BRAND RATINGS" section. Also try visiting the forums there and becoming a member.

DBfan187
04-08-2005, 08:18 AM
A bandpass designed specifically for those subs would sound amazing, but take up more space than you have now.

Decipha
04-08-2005, 08:26 AM
A bandpass designed specifically for those subs would sound amazing, but take up more space than you have now.


That's cool bass over safety,,, i already got rid of my spare, i just want them to boom *** much as they possibly can. Also, i just purchased these subs so upgrading isin't a question. Any one have any designs in mind??

dkc62
04-08-2005, 08:57 AM
A bandpass designed specifically for those subs would sound amazing, but take up more space than you have now.


timb2169 needs to read about custom bandpass designs more often. :laugh:

Decipha
04-08-2005, 10:23 AM
I was always told that a bandpass box will give you the most bass, that's my main objective. Can some one help me please?

Decipha
04-08-2005, 12:08 PM
Guess that means no, can some one give me some tips on making a good bandpass box? Do i make it to the specifics of the ported enclosure and the sealed area with the specs of the sealed enclosure?

AznRevlAzn
04-08-2005, 12:14 PM
i always thought that with a band pass box you take half the recommended volume and place that in each cabin (add more to the driver cabin for sub displacement) of the band pass enclosure. Iono, i did that for my friend setup with plexiglass and it did well. Very well actually.

Decipha
04-08-2005, 01:20 PM
i always thought that with a band pass box you take half the recommended volume and place that in each cabin (add more to the driver cabin for sub displacement) of the band pass enclosure. Iono, i did that for my friend setup with plexiglass and it did well. Very well actually.


Sealed box - Recommended Volume (Cubic Feet) - .85

Ported box - Recommended Volume (Cubic feet) - 1.25

F3(Hz) - 32, Displacement - 72.58 cu in.


So i would make the sealed area .425 cu, and the ported area .65 cu tuned at 32 hz?? That seems a little small for the ported area.

80INCHES
04-08-2005, 01:24 PM
wow thats small and u want to tune it 32hz....u talking a very long port
how much power u plan on running and how much space is availabe 4 u?

80

AznRevlAzn
04-08-2005, 01:26 PM
no wait, i times the amount by 2.25, sorry. And i took the specs for the ported for my friends set-up.

so it would be 1.41 cubes in the sealed area and iono about the ported area, i think 72.58 for displacement is crazy. Thats a huge driver you got there.

Decipha
04-08-2005, 01:29 PM
I knew it seemed small to me i always thought that a bandpass box would be at least the size of the recommended ported volume box if not more. The subs are 150 rms so im running 200 rms each. I have a 95 Beretta the boxes i have in their already are LARGE sealed boxes, im guessing at least 4 cubes each.

Decipha
04-08-2005, 01:34 PM
no wait, i times the amount by 2.25, sorry. And i took the specs for the ported for my friends set-up.

so it would be 1.41 cubes in the sealed area and iono about the ported area, i think 72.58 for displacement is crazy. Thats a huge driver you got there.




That sounds more like it.
The sealed section would be 1.9125 cu ft, and the ported would be 2.8545 cu ft ??


That still seems a little large for the sealed area.

80INCHES
04-08-2005, 01:35 PM
look
make the sealed part 1.5cubes(subs ina common chamber) and make the ported area 2cubes
make the port 3 x12x 14deep and u should be fine..

80

Decipha
04-08-2005, 01:38 PM
thanx