whats the best way to make a subwoofer box for two 18 inchers?

Question

i have two 18 inchers and i want to make a subwoofer box can any 1 give ideas or pictures

Answer 1

You can use a ported box for your subwoofers. Ported boxes produces much louder and longer bass. But be sure to follow the specs on the manual of your subwoofer regarding the box volume for the box. Usually they give the minimum box volume. You can increase the box volume a little. Like in Kicker solobaric L7 12 inch subs specs they have 3 categories for ported subs . Minimum box volume is 3 cu ft., for SPL - 4.5 cu ft. , for streetbass - 6.0 cu ft. if you don't have the manual, check the website of your subwoofer for the specs and technical details about the box.

Answer 2

Best way depends on what you want. If you want Boom then get the software and build a ported box. If you want great sound (well as great as 2 18's can sound) then sealed. Don't get me wrong you can get great sound from a ported box it just a lot harder to do.

I tend to put bass drivers in the smallest sealed box recommended for the driver and at least one side of the box at an angle or not parallel to the other side . This "in general" tends to give the smoothest sound. For example I put a kicker Comp 15 in a 3 cubic foot box with polly fill along with two Rockford 10s, each in a 1.1 cubic foot box with polly fill. It hit hard and went deep. With the combo like this it covered the low lows and the mid bass producing a very smooth low end.

Oops about construction. 3/4 inch or thicker medite or as dense of particle board as you can get. If you have large flat surfaces internal bracing can help. Use pollyfill, who cares if the old ladies at the fabric store look at you funny. Use Plenty of screws and wood glue. Even if it's ported use caulking to seal the seams internally.

Answer 3

Either sealed box or a ported (bass reflex) design. I'd strongly urge you to get some design software if you want the bass reflex type. It is very difficult to get the design right without it.

Actually, with these monster drivers, I'd go with the simple sealed box, stuffed with wool, or fibrous poly fill. The advantage to bass reflex would be window rattling volumes (not my cup of tea).

Since you are talking about two identical drivers in one subwoofer, I'd consider mounting one driver the normal way (cone out) and the 2nd one flipped over (basket out). Then the two drivers are wired with the opposite polarity, so that the sound output polarity is the same.

If the drivers are identical, this technique should eliminate odd order harmonic distortion. It is said that odd order distortion is more annoying to the human ear than even order distortion.

Answer 4

go to the parts express website