posted
Ok i've decided to go against DD's spec box of 2.5 cubes/27 sq inches port/40hz
Ok here's what I want I want to still be able to play somewhat low bass. The Box can be about 3.5 cubic feet
How much port should I do, some people have told me 60 sq inches, but in a 3.5 cube box wont that be tuned too high? I want the maximum port possible without losing alot of low bass. Please help me out, i'm ready to get htis thing done. Just tell me the size and port area and I'll design a box from there. Any help, as always, is appreciated. Thanx
-------------------- I NEED 1 DD 9515 Alpine CDA7863 Infinity Mids and highs DD 9512 (Sold) Custom Ported Box Concept CC-D2400a Optima Yellow top Stinger 0 gauge wire All Stinger HPM interconnects and accessories Dynamat Extreme
posted
what you should do is build your box with a rectangle port, tune it to around 45hz, then add slots of mdf to descrease the port area and thus descrease the tuning frequency until it sounds right or the way you like.
jaggy
-------------------- Digital Designs...true to the source
Posts: 1959 | From: England, UK | Registered: Dec 2000
| IP: Logged |
posted
depends on how long the port is. I would take jaggy's advice and start with a huge port(over 100sq in) and section it so you can block off sections and lower the tuning. As for the exact tuning, call the number on DD's site or email them, they're usually very helpful.
posted
i'll get you some box specs when I get to my home computer tonight
-------------------- ---Member of Team Gates--- Don't knock it, if you know nothing about it. Posts: 3074 | From: Okla USA | Registered: May 1999
| IP: Logged |
posted
3.25 cubes after port and driver displacement. port 5 x 10 = 50 inches of port 24 long(just make an L port if you don't have the depth) is tunned to 37 htz. 50 inches of port is plenty, or even 40sq inches. I had 80sq inches with 2 9512's doing 151.?? at 35-39 htz... yummy
And you can always make port length come out of the box. Through that whole, on the passenger side that folds down in the Lude.
-------------------- 2003 8th place World finals finish Loudest 1st Gen crx in the WORLD Loudest street A slotport Team DB Audio Loudest stock Car at usaci finals 159.8
posted
Yep, bigger the box, shorter the vent. I had assumed you wanted more SPL than SQ. Here's how I'd do it.
3.0^3 ft. after displacements. 30 sq. in. of port. 17.5" long for 35 Hz. 14 1/8" long for 38 Hz.
My 9512 is in a 2.58^3 ft. box with 24 sq. in. of vent tuned to 35 Hz. DD recommends 20 sq. in. of vent, which worked fine in my 2.29^3 ft. box. Really no noticable port noise with your head at the vent.
-AR
-------------------- 2001 F-150 XLT 4x4 Off-Road SuperCab - Premier DEH-P980BT - MB Quart QM 215.3CX Crossovers - DD T1 Tweeters - RF 5.25's - Eclipse SE 5x7's - Cadence A7+hc - Digital Designs 9512e (2.75^3 ft., 31^2 in. @ 35 Hz. "Downfiring") - Viper 500ESP Alarm
Posts: 611 | From: Killa City | Registered: Nov 2000
| IP: Logged |
Printer-friendly view of this topic