Termpro Audio Forum Post New Topic  Post A Reply
my profile | directory login | register | faq | forum home

  next oldest topic   next newest topic
» Termpro Audio Forum » Installer's Corner » SPL » Box for 3515???

- UBBFriend: Email this page to someone!    
Author Topic: Box for 3515???
bignick31985
Senior Member
Member # 9823

Icon 1 posted      Profile for bignick31985   Email bignick31985   Send New Private Message       Edit/Delete Post   Reply With Quote 
3.5 cubes @ 30 hz

How much port area and port length should I have?

The box programs are pretty complicated. I really need some help here.

Port length is the main thing but the box dimensions are width (like depth) (9inches)
height (17inches)
length (39.5inches)

its 3.5 cubes but ports are killin me

--------------------
88 Silverado RCSB, 5/8 on 20's, shaved the f*** up, tinted, notched, but still not quite painted

DiRtY SoUtH DEAF SqUaD
-

http://www.sounddomain.com/ride/2094089
Posts: 2087 | From: Charleston, SC | Registered: Jul 2002  |  IP: Logged | Report this post to a Moderator
bignick31985
Senior Member
Member # 9823

Icon 1 posted      Profile for bignick31985   Email bignick31985   Send New Private Message       Edit/Delete Post   Reply With Quote 
alright i got this so far

3.3 cubes
port is 4 inch diameter x 6.5 inch length

tuned to 34hz

i need to raise .2 cubes and drop tuning to 30...easy way to do this?

--------------------
88 Silverado RCSB, 5/8 on 20's, shaved the f*** up, tinted, notched, but still not quite painted

DiRtY SoUtH DEAF SqUaD
-

http://www.sounddomain.com/ride/2094089
Posts: 2087 | From: Charleston, SC | Registered: Jul 2002  |  IP: Logged | Report this post to a Moderator
alaska
Senior Member
Member # 531

Icon 1 posted      Profile for alaska   Author's Homepage   Email alaska   Send New Private Message       Edit/Delete Post   Reply With Quote 
hard to tune low and keep the port very short with much port area [Frown]

is there any way you can rearrange the dimensions on the box to accomodate a longer port? If you have to you can port on a side 90 degrees from the sub...but best to have on same plane

--------------------
"Those who give up liberty for the sake of security deserve neither liberty nor security" - Benjamin Franklin

DiRtY SoUtH DEAF SqUaD

-
Elemental Designs

To cheat is to admit defeat

---------------------------------
Loud...it's when you can see the ground move, it's when
you have to force yourself to breath, it's when the rest of
the world ceases to exist.
Posts: 4136 | From: Lafayette, LA | Registered: Sep 1999  |  IP: Logged | Report this post to a Moderator
bignick31985
Senior Member
Member # 9823

Icon 1 posted      Profile for bignick31985   Email bignick31985   Send New Private Message       Edit/Delete Post   Reply With Quote 
deepest i can go is like 15 inches

i have 3.64 cubes to allow for the 0.14 cubic feet of speaker displacement

3.64 cubes @ 30 hz has a port diamter of 4 inches and a port lenght of 7.41 inches

will this work?

[ 08-05-2002, 06:18 PM: Message edited by: bignick31985 ]

--------------------
88 Silverado RCSB, 5/8 on 20's, shaved the f*** up, tinted, notched, but still not quite painted

DiRtY SoUtH DEAF SqUaD
-

http://www.sounddomain.com/ride/2094089
Posts: 2087 | From: Charleston, SC | Registered: Jul 2002  |  IP: Logged | Report this post to a Moderator
bignick31985
Senior Member
Member # 9823

Icon 1 posted      Profile for bignick31985   Email bignick31985   Send New Private Message       Edit/Delete Post   Reply With Quote 
anybody got any info on it?

id like to start building the box soon

--------------------
88 Silverado RCSB, 5/8 on 20's, shaved the f*** up, tinted, notched, but still not quite painted

DiRtY SoUtH DEAF SqUaD
-

http://www.sounddomain.com/ride/2094089
Posts: 2087 | From: Charleston, SC | Registered: Jul 2002  |  IP: Logged | Report this post to a Moderator
jaggy
Senior Member
Member # 3590

Icon 1 posted      Profile for jaggy   Author's Homepage   Email jaggy   Send New Private Message       Edit/Delete Post   Reply With Quote 
put the port on the side of the box, where the longest length is. And keep the woofer on the front of the box. As long as the woofer and port are not on opposite sides of the box then it will sound good.

Also, now u can make the port a little bigger if u like and use rectangle ports. Some round ports made out of plastic can resonante at lower freq at high volumes and not sound very good.

Try a square port:-
30hz = 4" x 4" x 10" long

If u want the port on the same side as the subwoofer then just build an L shaped port.
http://www.ddaudio.com/caraudio/enclosureInfo/basicBox.asp

jaggy

[ 08-06-2002, 01:36 AM: Message edited by: jaggy ]

--------------------
Digital Designs...true to the source
Posts: 1959 | From: England, UK | Registered: Dec 2000  |  IP: Logged | Report this post to a Moderator
   

Quick Reply
Message:

HTML is not enabled.
UBB Code™ is enabled.

Instant Graemlins
   


Post New Topic  Post A Reply Close Topic   Feature Topic   Move Topic   Delete Topic next oldest topic   next newest topic
- Printer-friendly view of this topic
Hop To:


(c) 1996-2007 WHE Inc, Carson City Nevada, USA

Powered by Infopop Corporation
UBB.classic™ 6.7.2