Sub box recommendations please - diyAudio
Go Back   Home > Forums > General Interest > Car Audio
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 18th August 2004, 06:07 PM   #1
jaybird is offline jaybird  United States
diyAudio Member
Join Date: Jan 2003
Location: cincinnati
Default Sub box recommendations please

Hello all,
I have a infinity kappa 10" driver with parameters:
Fs= 26
Vas= 2.578(ft^3)
Qms= 7.39
Qes= 0.30
Qts= 0.29
Pmax= 225w
Re= 3ohm
Xmax= 8.13 mm
Le= 1.36
Sensitivity= 90.8 (dB@1w@1m)

I have 50wrms x 2 @4ohms to run this one sub. I'm not sure if I would like the sound of a ported sub in a Nissan Pathfinder but I'm affraid that I don't have enough power to run it sealed.

Any recommendations are welcome and thanks
  Reply With Quote
Old 19th August 2004, 01:28 AM   #2
clayton is offline clayton  United States
diyAudio Member
Join Date: Apr 2004
Location: LA.
Is your amp bridgeable? If so bridge it mono to your 1 sub & you will get 100w to it. A sealed box will give you better sq than a ported will.
  Reply With Quote
Old 19th August 2004, 06:00 AM   #3
diyAudio Member
Join Date: Aug 2004
Location: Great White North, eh?
Send a message via ICQ to SupraGuy Send a message via Yahoo to SupraGuy
A sealed box will give you better sq than a ported will.
Not necessarily. A properly designed ported box actually produces lower levels of distortion than a sealed box. However a sealed box is easier to build, and is less critical that measurements and volumes be exact. It will also be smaller (Which is the primary reason why I use sealed boxes in my car. -- I wanted to keep some cargo space!)

JL Audio's website has some good information on the relative merrits and drawbacks of various enclosure designs. Excellent reading.

As to power, I'm currently running a pair of 10" drivers with a low efficiency (<87 dB/W @1m) from a 60W X2 amplifier (Alpine V12 MRV-F300 30WX4 bridged to 2 channels) and it's plenty loud. The last audio competition that I was in, I hit 129dB SPL. Not spectacular, but the car is set up for SQ, not SPL. I never turn it up that loud for myself while I'm actually in the car.

A simple sealed box of appropriate size ought to work fine, especially with a bridged amp. If you have the room for it, a ported box will also do fine, but be careful with the dimensions and port size/length, remember to take into account the displacement of the speaker itself. A poorly built ported enclosure will not sound good. On the other hand, as long as you're CLOSE, a sealed enclosure is hard to screw up too badly.

It all depends on what you want out of the end result.
  Reply With Quote
Old 19th August 2004, 12:02 PM   #4
jaybird is offline jaybird  United States
diyAudio Member
Join Date: Jan 2003
Location: cincinnati
Thanks for your input. Sealed it is. I was wondering what alignment to build. Should I go for something in the middle like 0.5 ft^3 or go bigger (.75 ft^3) because of my power situation. I like rock music but I listen to a variety of music. I'm affraid to build too small (.25 ft^3) of an enclousure because of my power situation.
What do you all think?
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
SET recommendations ALF in AUS Tubes / Valves 11 16th November 2006 11:29 PM
Sub recommendations Please jaybird Subwoofers 8 17th December 2003 06:55 PM
op amp recommendations millwood Solid State 18 29th April 2003 12:49 PM

New To Site? Need Help?

All times are GMT. The time now is 12:44 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2