Passive Radiator info - Car Audio Classifieds!
Car Audio Classifieds!  

Go Back   Car Audio Classifieds! > Vendors > (PSI Car Audio)

(PSI Car Audio) PSI Car Audio Official Online Forum


Notices

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 06-18-2012, 12:16 PM
99Bonney's Avatar
Elite Member
 
Activity Longevity
0/20 18/20
Today Posts
0/11 sssss6246
Location: Pontiac, MI
Thanks: 3
Thanked 228 Times in 204 Posts
iTrader: (8)
Feedback Score: 8 reviews
Default

Not sure if it should be here or in your FMS section but I was inquiring about the use of a 10/12" PR in conjunction with a 10" sub. Box is 1 cube net sealed right now. Buddy wants to either port it or try out a PR. You said a 12" PR would do well 1cft. Down the road if he want to enlarge the box a bit and add another 10, would the 12" PR still be sufficient or will I need another PR. Let me know what you think, thanks!

Still interested!

I'd like to know some info before I have to order a 3" aero for my buddy. Thanks

I know, ordered from him in the past. Just a little urgent.

Bump!
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

2006 Tahoe
Subs- 4 Crossfire xs v2 15s
Amps-Crossfire 8k
Batts- 6 xs 3100s, 2400
Alts- 3 Mechman SMD 340s

Last edited by TeamPSI; 06-22-2012 at 08:30 AM.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 06-20-2012, 08:04 AM
CACO Member
 
Activity Longevity
0/20 15/20
Today Posts
0/11 ssssss147
Location: Albion, ny
Thanks: 8
Thanked 5 Times in 5 Posts
iTrader: (2)
Feedback Score: 2 reviews
Default

you gotta be patient man dave is busy. it took him a week for me and him to get in touch with each other. he isnt ignoring you.
Reply With Quote Quick reply to this message
  #3  
Old 06-22-2012, 08:34 AM
TeamPSI's Avatar
 
Activity Longevity
0/20 19/20
Today Posts
0/11 sssss4040
Location: FixMySpeaker.com
Thanks: 172
Thanked 121 Times in 100 Posts
iTrader: (15)
Feedback Score: 15 reviews
Default

Quote:
Originally Posted by 99Bonney View Post
Not sure if it should be here or in your FMS section but I was inquiring about the use of a 10/12" PR in conjunction with a 10" sub. Box is 1 cube net sealed right now. Buddy wants to either port it or try out a PR. You said a 12" PR would do well 1cft. Down the road if he want to enlarge the box a bit and add another 10, would the 12" PR still be sufficient or will I need another PR. Let me know what you think, thanks!

Still interested!

I'd like to know some info before I have to order a 3" aero for my buddy. Thanks

I know, ordered from him in the past. Just a little urgent.

Bump!
Dropping a 12" PR into the 1ft box would be a great setup with the single 10" sub.

Would it work with (2) 10's and a single 12" PR?
YES, but you would be limited by the PR itself. You'd be able to max out the PR in high power/high excursion situations. You'd basically outdisplace it, and over-excurt it.

You'd still want to add another PR to keep things working properly.
__________________
-David Moore


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote Quick reply to this message
 
  #4  
Old 06-22-2012, 11:25 AM
99Bonney's Avatar
Elite Member
 
Activity Longevity
0/20 18/20
Today Posts
0/11 sssss6246
Location: Pontiac, MI
Thanks: 3
Thanked 228 Times in 204 Posts
iTrader: (8)
Feedback Score: 8 reviews
Default

Is there any general rule of thumb for PR size vs enclosure size? For example would 2 10" subs work well with 2 10" PRs? Or is 1 10" PR good for .5cft and 1 12" for 1cft? Some info on that would be greatly appreciated.
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

2006 Tahoe
Subs- 4 Crossfire xs v2 15s
Amps-Crossfire 8k
Batts- 6 xs 3100s, 2400
Alts- 3 Mechman SMD 340s
Reply With Quote Quick reply to this message
  #5  
Old 06-22-2012, 12:03 PM
CACO Member
 
Activity Longevity
0/20 17/20
Today Posts
0/11 ssssss345
Location: MS
Thanks: 0
Thanked 21 Times in 17 Posts
iTrader: (3)
Feedback Score: 3 reviews
Default

Quote:
Is there any general rule of thumb for PR size vs enclosure size?
No. You want to choose the PR size based on the size and excursion of the driver. You want about 50% swept volume of the PR compared to the active driver.

You tune the PR by changing the weight. It's the same concept as lengthening the port of a ported sub. Let's say you have a 10" PR with an Sd of 310cm^2. That's the same as a port that has 310 cm^2 of opening (round, square or slot - it does not matter). Then use your standard modeling software to determine how long the port needs to be to get the turning you want. Then you convert that column of air to grams and that is needs to be the moving mass of the PR.

Or you download Unibox and use the PR box design section.
Reply With Quote Quick reply to this message
  #6  
Old 06-22-2012, 12:17 PM
99Bonney's Avatar
Elite Member
 
Activity Longevity
0/20 18/20
Today Posts
0/11 sssss6246
Location: Pontiac, MI
Thanks: 3
Thanked 228 Times in 204 Posts
iTrader: (8)
Feedback Score: 8 reviews
Default

Thank you for the info! Now time to apply it lol. I'll look into getting that unibox program.
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

2006 Tahoe
Subs- 4 Crossfire xs v2 15s
Amps-Crossfire 8k
Batts- 6 xs 3100s, 2400
Alts- 3 Mechman SMD 340s
Reply With Quote Quick reply to this message
  #7  
Old 06-22-2012, 12:44 PM
CACO Member
 
Activity Longevity
0/20 17/20
Today Posts
0/11 ssssss345
Location: MS
Thanks: 0
Thanked 21 Times in 17 Posts
iTrader: (3)
Feedback Score: 3 reviews
Default

Unibox - Unified Box Modeler Loudspeaker Design Software
Reply With Quote Quick reply to this message
  #8  
Old 06-22-2012, 01:40 PM
99Bonney's Avatar
Elite Member
 
Activity Longevity
0/20 18/20
Today Posts
0/11 sssss6246
Location: Pontiac, MI
Thanks: 3
Thanked 228 Times in 204 Posts
iTrader: (8)
Feedback Score: 8 reviews
Default

Downloaded. Maybe you could walk me through modeling PR's? Theres an overwhelming amount of info on this spreadsheet lol.
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

2006 Tahoe
Subs- 4 Crossfire xs v2 15s
Amps-Crossfire 8k
Batts- 6 xs 3100s, 2400
Alts- 3 Mechman SMD 340s
Reply With Quote Quick reply to this message
  #9  
Old 06-22-2012, 01:56 PM
CACO Member
 
Activity Longevity
0/20 17/20
Today Posts
0/11 ssssss345
Location: MS
Thanks: 0
Thanked 21 Times in 17 Posts
iTrader: (3)
Feedback Score: 3 reviews
Default

If you can't get the information for the PR, just model a ported box using round ports. If you have a 10", then find the moving diameter from the Sd of the PR. Once you do that, you have the diameter of the port. Your port will be extremely long though. Once you figure that out, find the volume of air inside the port. From a physics site, 1 cubic foot of air at standard temperature and pressure assuming average composition weighs approximately 0.0807 lbs. Convert that to grams and that's the moving mass of the PR.

Another way to figure this out is to mount the PR backwards so you add/remove weight. The resonant frequency of the PR is your tuning frequency. You can determine that by playing a sine wave sweep and seeing at which frequency it moves the most. Or you can use Woofer Tester (I recommend that to anyone building subs) to quickly find not only the enclosure's Fs, but you can find your impedance rise as well.
Reply With Quote Quick reply to this message
  #10  
Old 06-22-2012, 02:53 PM
99Bonney's Avatar
Elite Member
 
Activity Longevity
0/20 18/20
Today Posts
0/11 sssss6246
Location: Pontiac, MI
Thanks: 3
Thanked 228 Times in 204 Posts
iTrader: (8)
Feedback Score: 8 reviews
Default

Thanks for the reply. You make it sound simple lol. I think ordering woofer tester might be a good idea. If I gave you the dims of the enclosure and model of 10" sub do you think you could model it up close enough even without the PR's specs? Do you even need actual dimensions or is the amount of airspace all that is relevant?
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

2006 Tahoe
Subs- 4 Crossfire xs v2 15s
Amps-Crossfire 8k
Batts- 6 xs 3100s, 2400
Alts- 3 Mechman SMD 340s
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Car Audio Classifieds! forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Location
Where you live
Level of Car Audio Knowledge
What's your level of car audio?

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
passive radiator timwebb General Car Audio Discussion & Questions 4 04-12-2012 08:05 PM
passive radiator richdog102 (Fix My Speaker) 2 02-07-2012 11:53 AM
Passive Radiator jwright0291 Wiring, Electrical & Other Installation Equipment 6 02-05-2012 09:29 PM
passive radiator basschild Speaker Accessories & Parts 0 05-17-2011 03:09 PM
Passive radiator? basshead08 General Car Audio Discussion & Questions 0 03-02-2010 07:27 AM

» Amps
A/d/s/
Advent
Alphasonik
Alpine
American Bass
ARC Audio
Atomic
Audio Art
Audio Gods
Audiobahn
Audiocontrol
Audiopipe
Audison
Aura
Autotek
Avionixx
Bazooka
Beyma
Blaupunkt
Boss
Boston Acoustics
Bravox
Cadence
Cascade (CAE)
CDT Audio
Cerwin Vega
Clarion
Clif Designs
Concept
Coustic
Critical Mass
Crossfire
Crunch
DB Drive
DC Audio
DC Power
DEI
Denon
Diabolo
Diamond
Digital Designs
Directed
DLS
Dual
DYnamat
Dynaudio
Earthquake
Eclipse
Elemental Designs
ESX
Eton
Farenheit
Fi Car Audio
Fix My Speaker
Focal
Fusion
Genesis
Ground Zero
Hafler
Helix
Hertz
Hifonics
Hushmat
Image Dynamics
Infinity
Interfire
JBL
Jensen
JL Audio
JVC
Kenwood
Kicker
Knu Konceptz
Kole Audio
Kove Audio
Lanzar
Lightning Audio
Linear Power
MA Audio
Magnat
Marantz
Massive Audio
MB Quart
McIntosh
Memphis
Metra
MMATS
Mobile Authority
Morel
MTX
Nakamichi
Niche Audio
O2 Audio
Ohio Generator
Optima
Orion
Oxygen Audio
OZ Audio
PG Audio
Phase Linear
Phoenix Gold
Pioneer
Polk
Power Acoustik
Powerbass
Powermaster
Precision Power
Profile
Pyle
Pyramid
RadioShack
Rainbow
Rampage
RE AUdio
Rockford Fosgate
Scanspeak
Scosche
Seas
Sony
soundstream
Sparkomatic
SPL Dynamics
Stinger
Sundown Audio
Swiss Audio
Targa
TC Sounds
TREO Engineering
TRU
Tsunami
Ultimate
US Acoustics
US Amps
Velodyne
Vifa
Viper
Visonik
Xtant
Zapco
Zed Audio
Powered by vBadvanced CMPS v3.2.3
Links
Amp Guts
amplifier, amp guts, ampguts, car audio classifieds, speakers and subs for sale with listings of 12 volt sound systems. Security systems for sale for aftermarket car audio equipment with amplifier and amps for sale
Car Audio Forum
car audio forum, moble audio, car stereo, wholesale car audio, 12 volt, with, amplifier, amp, subwoofer, sound quality, buy car audio, and sell automotive stereo systems for cars
Car Audio Sound Quality Forum
Sound QUality science based car audio forum, amplifier, subs and speaker design, fabrication help, sound systems forum, aftermarket car audio website for sound quality.
Car Stereo Forum
DIYMA car audio stereo forum for 12 volt car audio subwoofer and amplifier systems that have sound quality with wholesale car audio products.


All times are GMT -5. The time now is 03:27 PM.


Powered by vBulletin
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.6.0
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.