Posted September 1, 200520 yr I have a 15" RL-p d4 paralell @ 2ohms on a Viper d1200.1.I have a horrible box(24x18.75x13) ported with a 2"diameter 7" deep aeroport) and I have no idea what it's tuned to.Basically, I'm wondering if I should just completely ditch this box, try to port it, seal it up and use it as sealed, or build an entire new box(I don't REALLY want to, but I probably will.)How would this box sound if I ported it? I saw that I can get some 4" flared aeroports for pretty cheap. Your thoughts?
September 1, 200520 yr well, depending upon wood thickness ( i used 3/4) that box is about 2.36ft^3 after port and sub displacment tuned in the low 20's.....size and tuning wise, that's not bad for a 15" rl-p...but the port is entirely way too small....u will get chit tons of noise outa that...my suggestion is to seal it up, and slug it until u get to about 2ft^3 net. use that until u can build a good ported box....about 2.75-3ft^3 tuned to 30hz, 30-35in^2 of port...wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
September 1, 200520 yr Author This is going to be embarrassing.I don't mind learning, but can someone explain to me how to calculate the tuning of a port?
September 1, 200520 yr Kent's got the idea. 2.1 cu ft net volume sealed (2.31 cu ft gross internal volume) is my preferred sealed box rec on an RL-p15 for a beautifully even frequency response. Indeed, ported RL-p15's should have at least 35 square inches of port area per driver, and for in-car use I would tune between 28-34 Hz. Lower tuning in-car is unecessary in my opinion since cabin gain will boost the low-end naturally and the lower tuning will ultimately take away from the output over the higher sub-bass frequencies that are more commonly exhibited in music samples.
September 1, 200520 yr This is going to be embarrassing.I don't mind learning, but can someone explain to me how to calculate the tuning of a port?If you don't mind learning, then you have nothing to be embarrassed about! To begin, this link from the good (and money hungry ) folks over at JL Audio will exaplin all you need to know about the ported enclosure alignmentJL Audio's Ported Enclosure TutorialAnother great link:Basic Car Audio Electronics Guide to Building Subwoofer EnclosuresOnce you understand the basics, I would advocate using an online calculator to simplify the process:Easy to Use Calculator for Round/Square Ports
September 1, 200520 yr Author Sweet! I'm gonna read through those more thouroughly when I get home and hopefully I'll make some plans for a box; then I'll bring it back to you guys for a thumbs up.
September 1, 200520 yr awesome!! sounds like a plan man..we'll be awaiting!!wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
September 2, 200520 yr 2.1 cu ft net volume sealed (2.31 cu ft gross internal volume) is my preferred sealed box rec on an RL-p15 for a beautifully even frequency response.I agree with that!
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