Um. No. No. No. No. If you look up the specifications for any respectable sub, they will list the size the box should be. They will usually give both sealed and ported sizes (as they is a big difference between the two styles). For instance, here's a website that lists the requirements for the sub I'm running:bigbird said:as far as i know, the bigger the box the better the sound resonance. i think its ur no names that are the problem. i had some no names that i got for about 50 bucks a piece. they SUCKED.
Now, my box is ported, and is 22"x11.5"x11.5". So, using LxWxH=2909.5 cubic inches. Multiply that by 0.0005787, and we get 1.68 cubic feet. Right in the specifications for my sub.Subwoofer Specifications
Size: 10 inch
Sealed Box Dims: 0.63 - 0.63 cu. ft.
Ported Box Dims: 0.75 - 1.75 cu. ft.
Free Air Usage: not recommended
Sensitivity: 83 dB
20x18x22 = 7,920 Cubic inches, multiply that and we get, 4.58 cubic feet. Since you've got some generic 12" and not a 1000Watt RMS sub, we can safely assume your box is too large (especially if it's a SEALED box). However, there are multitudes of things that could make it sound worse.Sealed Box Volume 1.00 cubic ft.
Ported Box Volume 1.75 - 4.0 cubic ft.