Mobile Audio Competitors Organization
Mobile Audio Competitors Organization
Mobile Audio Competitors Organization
Would you like to react to this message? Create an account in a few clicks or log in to continue.

Mobile Audio Competitors Organization

THE LOUDEST SPORT ON EARTH!
 
HomePortalGalleryLatest imagesSearchRegisterLog in
Joint Finals a success. USACI numbers down due to very remote (from USACI) location but better than expected. Results posted on web site.
March 2024
MonTueWedThuFriSatSun
    123
45678910
11121314151617
18192021222324
25262728293031
CalendarCalendar
Latest topics
» STETSOM 7KD
port - Port ? Icon_minitimeWed Sep 23, 2020 7:37 pm by big bass joel

» any blown stetsom 7kd or 2k6d amps for sale
port - Port ? Icon_minitimeThu Sep 10, 2020 7:32 pm by big bass joel

» We need the forums back
port - Port ? Icon_minitimeMon Jul 29, 2019 2:41 pm by svillarrial

» THIS OLD FORUM IS ALIVE!!!! 6/14/17
port - Port ? Icon_minitimeFri Sep 22, 2017 11:11 pm by 80INCHES

» It's back up !
port - Port ? Icon_minitimeThu Jun 16, 2016 7:03 pm by chrisfish

» 2 Atomic apocalypse 12s D4
port - Port ? Icon_minitimeWed Feb 24, 2016 12:53 am by supersquirt

» well hello
port - Port ? Icon_minitimeSat Sep 26, 2015 5:46 am by TAMU

» WELLLWELLL
port - Port ? Icon_minitimeTue Jul 14, 2015 4:24 pm by Nice

» SLAMBOREE AUG 1 & 2
port - Port ? Icon_minitimeThu Jul 09, 2015 12:14 pm by Pro_Mom

Top posters
sanman
port - Port ? Vote_lcapport - Port ? Voting_barport - Port ? Vote_rcap 
The_Rowlands
port - Port ? Vote_lcapport - Port ? Voting_barport - Port ? Vote_rcap 
chrisfish
port - Port ? Vote_lcapport - Port ? Voting_barport - Port ? Vote_rcap 
Stingraysevenout
port - Port ? Vote_lcapport - Port ? Voting_barport - Port ? Vote_rcap 
scionsoloxb
port - Port ? Vote_lcapport - Port ? Voting_barport - Port ? Vote_rcap 
TECH114
port - Port ? Vote_lcapport - Port ? Voting_barport - Port ? Vote_rcap 
Alan
port - Port ? Vote_lcapport - Port ? Voting_barport - Port ? Vote_rcap 
supadave
port - Port ? Vote_lcapport - Port ? Voting_barport - Port ? Vote_rcap 
Moparbass28
port - Port ? Vote_lcapport - Port ? Voting_barport - Port ? Vote_rcap 
Navi
port - Port ? Vote_lcapport - Port ? Voting_barport - Port ? Vote_rcap 
Statistics
We have 1855 registered users
The newest registered user is Farenheit

Our users have posted a total of 222582 messages in 12665 subjects
Keywords
finals louisiana silence pics 2010 build Johncarr quad songs Audiopipe crank chef contest records record state globe stereo 80inches crzyblondgrl world drive kyle broken dollar disc
Social bookmarking
Social bookmarking reddit      

Bookmark and share the address of United States Autosound Competition International on your social bookmarking website

Bookmark and share the address of Mobile Audio Competitors Organization on your social bookmarking website

 

 Port ?

Go down 
2 posters
AuthorMessage
HallMarc
Novice Contributor
Novice Contributor
HallMarc


Number of posts : 56
Age : 43
Location : West Point, Ms
Registration date : 2011-05-08

port - Port ? Empty
PostSubject: Port ?   port - Port ? Icon_minitimeTue May 10, 2011 11:03 pm

See if you can fallow me on this one...
When you put dimensions and whatnot into a port calculator, desired port size and tuning fq, it gives you a length. BUT, does it automatically take out the displacement of the port???

Say you have a port 12x4 (just for example) and a box after all displacement is exactly 3ft3... (This is using the port calc on 12volt.com...) @45hz it gives you a length of 15.574826200688225, round it down that's 15-9/16. Assuming 3/4" materials external port would be 5.5x13.5x15-9/16, port displacement would be 0.6687. That makes your total box vol 2.3313ft3...
Now, a 12x4x15-9/16 port in a 2.3313ft3 box would tune to 51.06hz... Following me?

I know of a couple port calculators and all of them give about the same info as far as port length...
Maybe I'm just putting too much thought into it.
I could understand it if your port was external because then your not adding port displacement to your box volume. Which brings me to another question; What or is there a difference between internal or external ports? What about half internal and half external? I mean, You'd have the same amount of port area, right???
Back to top Go down
Thomas HUFFman
Basic Contributor
Basic Contributor
Thomas HUFFman


Number of posts : 453
Age : 40
Location : West Point MS
Registration date : 2011-05-07

port - Port ? Empty
PostSubject: Re: Port ?   port - Port ? Icon_minitimeTue May 10, 2011 11:13 pm

The half internal and half external was how the 3 Nighshade 12's were in the colorado with the bed cut, it was 14'' long and 9 inches of it was out in front of the subs. I even still got some pics of that.
Back to top Go down
 
Port ?
Back to top 
Page 1 of 1
 Similar topics
-
» port length
» port help!!
» sub box an port size
» port war box
» box port help

Permissions in this forum:You cannot reply to topics in this forum
Mobile Audio Competitors Organization :: GENERAL DISCUSSION :: HOW TO GET LOUD! :: HOW TO GET LOUD!-
Jump to: