can i make a ported box for a small speaker? - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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
Reply
 
Thread Tools Search this Thread
Old 27th October 2009, 03:01 AM   #1
diyAudio Member
 
Join Date: Jul 2008
Location: Montreal
Send a message via Yahoo to scampo77
Default can i make a ported box for a small speaker?

in a car

i am still trying to understand what a bass reflex system is and how it works. so i thought i would ask before i start a new box.

is it recomended to build a ported box for speakers that are 6.5 or 5.25? are ports just for ultra lows from a sub woofer or is it possible to use ports to extend and reinforce sound from all ranges?

ported or sealed how do i find out what size to build the boxes? this info seems readily availible for subs but not for small mid and high range speakers.
  Reply With Quote
Old 27th October 2009, 03:07 AM   #2
Glowbug is offline Glowbug  United States
diyAudio Member
 
Glowbug's Avatar
 
Join Date: Feb 2006
Location: Hillsborough, NC/McLean, VA
Hopefully a moderator can move this to Car Audio.

No, in a car I'd recommend using them in the doors...you can build sealed enclosures such as fiberglass pods in the kickpanels or doorpods, but generally that's to put a driver more on-axis or solve some other installation problem.

It's amazing how low of a response you can get from properly sealed and deadened door panels
__________________
Jim J.
  Reply With Quote
Old 27th October 2009, 03:17 AM   #3
diyAudio Member
 
Join Date: Jul 2008
Location: Montreal
Send a message via Yahoo to scampo77
sorry about posting in the wrong catagory

i should be a little more clear. this isnt a car as much as a commercial truck and i cant put speakers in the door or kickpanels. but i can put them all around my head (and the passengers side too) to describe it better, it would be where your sun visor is in a car.
so i dont get the advantage of a door acting as a speaker box.

if i do stick with sealed boxes (and i really want to try ported) how big do i make the inside volume of the boxes? all of the custom fiber glass things i have seen dont seem to be aiming for a interior dimension as much as the axis/install thing you pointed out. i cant help be feel that the volume should be acounted for
  Reply With Quote
Old 27th October 2009, 04:57 AM   #4
diyAudio Member
 
Richard Ellis's Avatar
 
Join Date: Sep 2006
Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
Default Porting

Scampo:
What your alluding to is what is called The T/S parameters. The TS refers to two gentlemen Thiele and Small........
These two guys pioneered the mathmatical specifications of speaker drivers.
With this collection of specifications anyone??? can calculate internal volumes of speaker boxes....for either sealed systems or ported designs.
Some of us here have these math formulas well memorized & can crunch some numbers for ya ...But we need these parameters to get started.

__________________________________________________ _____Rick....
  Reply With Quote
Old 27th October 2009, 05:20 AM   #5
diyAudio Member
 
Join Date: Feb 2002
Location: Western Sydney
If you're using a sub, there is no point in porting the mid speakers.
Otherwise, as Richard said, you need the T/S parameters of the driver.
Whether a driver is suitable for a ported enclosure depends on a combination of these parameters. These can be input to a program like WINISD or Unibox (both free to download) to find the box and port size.
__________________
Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency
  Reply With Quote
Old 27th October 2009, 05:54 AM   #6
diyAudio Member
 
Join Date: Jul 2008
Location: Montreal
Send a message via Yahoo to scampo77
i am doing this because i have always wanted to learn and know about this and i think this is a great learning oppertunity. can anyone give me a link to learn more about the T/S parameters and what they all mean (hopefully explainations i dont need a PhD in car audio to understand).
i downloaded winisd and it is quite confusing but i am hoping i can get it straghtened out. although i appreciate the offer to crunch the numbers for me i would really rather learn how to do it myself and instead bug you for the information on T/S and winISD

if i do get the T/S parameters should i build little boxes for them to a specific size? like a sub box. will the dimensions for these size speakers be as crucial as a sub box?
  Reply With Quote
Old 27th October 2009, 10:02 AM   #7
ZippyTs is offline ZippyTs  United States
diyAudio Member
 
ZippyTs's Avatar
 
Join Date: Oct 2009
Location: Sacramento, Ca
Basic Car Audio Electronics
has always been a good place to learn about audio
  Reply With Quote

Reply


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
Ported speaker ?? dallaire Multi-Way 6 2nd July 2008 05:33 PM
what are some sealed and ported box sizes you can suggest for this speaker ? zuki Subwoofers 17 8th March 2007 05:51 PM
Ported Enclosure Design w/o Driver Theil-Small Parameters misterbobman Multi-Way 6 29th March 2005 02:06 PM
Would ported or sealed enclosure be best for this driver in small PA system? The Paulinator Multi-Way 26 25th April 2004 03:38 AM
Finished my sealed sub but now want to make it ported? AudioIsFun Multi-Way 13 27th February 2004 11:50 PM


New To Site? Need Help?

All times are GMT. The time now is 09:54 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2