OK I'm new here but I have been into car audio for a while. I have two Alpine Type X 12" with an Alpine MRD-M1005 in a sealed fiberglass box and I need help with this. I'm hitting 140.4 DB now and I want to go to a ported box for local comps. Does anyone know where I can find the plans or at least a calculator for a ported box? Thanks or any help!
i've been using this box calculator from RE and i've had great luck with it, its simple and it lays out all of the cuts for you too. http://reaudio.com/speaker_box/LPort_Box_Calc.html
If you want a ported enclosure for competitions than we need to know the resonant frequency (or close) of your vehicle...what vehicle. and how much space you have for an enclosure
how do you find out the resonant frequency? I remember it was discussed before... I would like to find the resonant frequency of my expy...
measure from the port to the location of the mic, take 13560 and divide by your measurement. Then decide by 4 or 2 until it is a realistic frequency, then build a box that peaks at that.I think... Haha
Thanks for the recommendations! I checked the RE audio and the only problem I saw was that it doesn't account for the displacement of the sub. I have an 03 Trailblazer and lots of room.
Ah the true masters, there like the lamas here on these boards... any question and we turn to our great teachers for guidance and knowledge
