I guess I'll do this to give everyone an idea about how I do this. Its really not hard. A customer came to us with a 2000 Mercury Cougar. He wants a really loud box. First, I'll be using a single 15-inch woofer and a ported box. Now the Cougar is a short vehicle, there is no way that a 30 Hz wave can be produced in this car and besides he wants it loud. The car is a hatch back, not an SUV, so my thinking will be a little different. The box will be smaller, I need the peak (NOT the port tuning) to be near 50 Hz. I need the port tuning to be somewhere between 40 and 45 Hz. I have not loaded anything in WinISD yet but I'll start working on it Friday or Monday. The space I have to work with is 32-inches wide, by 18-inches tall, by 12 to 14-inches deep. These dimensions are not negotiable. I will be using a Planet Audio 1400 watt RMS amp.
My roommate has a 1999 mercury cougar. We did two crossfire db10ws and an infinity 1300a amp making 250-300rms. The box is 3cuft@33hz as suggested by azn. I know its not optimal for the loudness but it does get very low and loud. You'll be surprised at what that car will give you.
I agree, hatchbacks are easy to build for. But I'm shooting for almost insane. So the port will be 16.5-inches tall and 2.5-inches wide. So for a tuning between 38 and 42 Hz, I will need a length of around 18-inches. This is just an estimate right now, I'll look at it more later
I gotcha. What tuning do you think I should go with on a 4cuft box for two 13ov.2s with around 1500rms and alooooot of port? Its for an acura mdx. We want crazy numbers at the dash and some good solid lows.
40Hz G3...biggest port you can fit. I always hear about ppl saying if the port is too big that the cone will lose control and act like its free airing. These ppl are retarded. Some are even pretty knowledgeable. But still retards. A port is a port it will still function as a port unless so big and net volume so small the enclosure starts to act as a 1/4 resonator.
a buddy of mine used to do bends, and what ive seen for bending (and i think ive seen something onhere with it too, but i dont remember where it was...) is measure out your bend, then make slats in the MDF with a router or dremel with a hight limiter (like a C clip, if you get havea a nice packaged dremel they should have one in the kit if not you can get one at a local hardware store, or just fab one) slat the mdf about 1/4-1/2 inch deep and depending on the depth of the bend (youll have to play with pre pieces before you get the measurement down) but cut a couple inches apart for longer turns and closer together for tighter turns, use some reson to fill in the slats and emediatley bend and find a way to hold the position, i know its vauge but every one has different means in thier garage lol. let it sit till the reson hardens and the bend should hold. again ive only seen this done in process, ill call my buddy that used to do it and have him email me a step by step, then edit this post.
