When modeling the Marty subs, I get a value close to 160 Hz for all of them.Having built a few hundred slot port speakers the main key to the slot.Next is the audibility threshold is reached with a higher port speed as the ratio of cross sectional area to surface area increases.Subwoofer wiring and Subwoofer enclosure calculators. values to calculate the resistance of speakers or voice coils. Slot Port Length Calculator.As shown in the attached RTA capture from REW, there was nothing but the 17Hz fundamental within at least 35dBs of the 17Hz peak.To compensate, Subwoofer Simulator can calculate the requried parameters. Physical port length is influenced by end-correction, (and user defined values for).The Subwoofer Design Toolbox by MFR Engineering is an easy to use but powerful program for. rectangle or slot ports. Calculate the volumes of prefab.
Dual 12'' Transmission Line Advanced Slot Ported Sub Box (HB2x12SPL2) - New Page 3 Fits Most Hatch Back and Trunks 2-12'' Speakers Transmissions Line Slot Ported Box.
The following calculator makes it a little bit easier for you; the result is automatically entered into to calculator at the top. Qts Correction Calculator (Qts.
Some people fail to compensate for the outer wall effectively lengthening their port, as well as their floor if the port is on the floor.L-Slot Vent Bass Reflex Enclosure Calculator. how to calculate vented subwoofer l port box l port subwoofer L ported speaker box calculator l ported sub box.
Piano Black Fusion 12 Tempests, Fusion 8 MTM, UXL-18 and DIY Stands Build Thread (Finished).As port diameter increase, cross sectional area increases more than surface area.I even placed myself and the off cabinet in the same locations to try to limit variable changes to the driver only.
Throw a little smoothing at it and the green curve nearly becomes a straight line.:-) As I said earlier, they measure pretty much the way WinISD predicted they should.Slot Port Calculator?. Reading on the JL audio webpage, it looks like a slot port should be a little LONGER than a square port, due to the end correction factor.Kenwood, Pioneer, Rockford Fosgate, JVC, Sony, Clarion, Jensen, Infinity, Kicker and more.I was saying what I feel comfortable building not issuing a fiat.My experience is you can get away with a lot of less-than-optimal port configurations as long as you keep port velocity low.FYI L-Shaped Slot Port Calculator Discussion in 'Amps. http://reaudio.com/speaker_box/LPort_Box. The slot port consumes the smallest amount of useable space on.
If chuffing results from some sidewall related effect, than slot aspect ratio matters a little, for low aspect ratios, but not much.Find Car Stereo, Marine Speakers, Amplifiers, Home Theater, Powersports Audio and much more at the Official JL Audio site.