Wtf?

Dragon Slayer · April 18, 2007

Man one would think that with 4 or 5 brands of shallow mount subs that these friggin companies that make boxes would make a box for the Crew cabs (07 classic) that will hold either one or two 12's...... Anyone know where I can get one?

OR does anyone have a box with one or two 10's that can tell me if the hole was cut out larger for a 12 will they still be able to mount????

vxaxv17 · April 19, 2007

I have the box with 2 10's but have not checked if 12's would fit with larger holes. I'd like to know as well. The 10's are good but 12's would be ideal.http://www.gm-trucks.com/forums/

Nova · April 19, 2007

I think the box thing probably has a lot to do with volume. I noticed most dual 10 boxes for crew cabs are around .5 cubic feet per side before displacement, and it is hard enough to find a 10 that will sound good in such a small enclosure.

Dragon Slayer · April 19, 2007

I think the box thing probably has a lot to do with volume. I noticed most dual 10 boxes for crew cabs are around .5 cubic feet per side before displacement, and it is hard enough to find a 10 that will sound good in such a small enclosure.

The two I found one has .6 and the other has .77 The speakers I am looking at have to have .40 to 1.00 so will the .77 box be better than the .6 or does it matter?

Here is the information on the sub.

Peak Power Handling 600Watts

RMS Power Range 300Watts

Impedance ( Ohms ) 2

Free-Air No

Dual Voice Coil Yes

Sensitivity 83 dBdB

Frequency Response 45-250Hz

Cone Material Kevlar reinforced fiber

Surround Material Poly ether ester

Dimensions

Sealed Box Volume (cu ft 0.40 - 1.00

Ported Box Volume (cu ft) 0.75 - 0.75

Top Mount Depth 3.55"

Cutout Diameter or Length 9"

Size 10"

asilverblazer · April 20, 2007

My 10" subs required 1 cubic foot volume non-ported. Which filled the entire space under the rear seat of my extended cab. I verified the volume with the manufacturer of the subs. If I recall you can go less volume if you port the box.

Nytemare · April 20, 2007

Ported boxes are usually bigger than sealed boxes.

a 10% size variance is fine.

Boston acoustics have 10" subs that require .5 cubic foot boxes, and their 12's require .7

Wilsonmetro · April 23, 2007

Nytemare's comment about ported boxes being bigger than sealed is true if you want to keep the same low-end response. A lot of ported subs do go smaller, but at the cost of sound quality and low end bass.

In general, if you try to cram too much speaker into too small a box, you risk a nasty one-note boom that's super loud but loose and sloppy. But some people are into that.

Dyabolical · May 10, 2007

Wilson, bud, some of your information scares me.

If space is limited, you are fine to go under manufacturers specs. What you can do to create more deep end extension is to stuff the enclosure with polly fill before you mount the sub.

Pollyfil is that cotton like stuff you get at the craft store. What it does is slows the sound waves inside the enclosure to make the box accoustically larger.

Wilsonmetro · May 10, 2007

Wilson, bud, some of your information scares me.

Don't be so afraid of reality, Dyabolical. It does exist, no matter how many times you deny it. Just kiddn'.

I speak what I believe, and you speak what you believe, and that's a forum. I do wonder where you get some of your ideas from. Either we're from different universes where physics are reversed, or one of us is spouting pure rubbish.

It's left to the reader to decide which is which, as always. Have a good one!

Nytemare · May 10, 2007

diabolical's comment is right too, polyfill gives the inside of the box more surface area, and tightens up the sound.

But the tighter it is the less loud it will be. My buddy used it in his box of 3 15" subs. Gave them good response, but less sound. basicly 12's will react like 10's, but hit like 12's. You'll just need more amp to make the hits louder. Its a good way of giving your system a broader range of music capability as you can play rap and get the long lows, or metal and get the quick beats, all with the same sub.

If your filing the box, 30-40% smaller would be the limit I would sugest staying around the 25% area though. This way you may get away with using a smaller amp than you would have to with a large box, but not risk losing sound, or blowing the sub appart.

Wilsonmetro · May 10, 2007

Polyfill does create the equivalent of a larger box compared to an unfilled box, but most manufacturers already spec their boxes with fill so you're not getting away with anything, you're breaking even.

Stuffing even more polyfill in to try to get more gains doesn't work, because the adiabatic gains only work when it's loose and able to move. Cramming more stuffing in so it's compacted just makes the box smaller again.

My comment was that when you go smaller than manufacturer's recommendations, you loose sound quality and no amount of polyfill or porting will change that. In general, my response to Dyabolical was that I'm at odds with most his reasoning, such as capacitors and what not, but forums are good for discussions like this.

Nytemare · May 10, 2007

Yeah this is true, cramming it will do nothing. No matter what you do...if you stray from specs you will lose something. Whether that be quality, volume, or whatever. It all depends in the end what your looking for and what type of music you listen to.

And yeah, forums give everyones POV whether its right or wrong, the reader must decide ultimately what they're gonna try.

Dyabolical · May 10, 2007

Wilson, bud, some of your information scares me.

Don't be so afraid of reality, Dyabolical. It does exist, no matter how many times you deny it. Just kiddn'.

I speak what I believe, and you speak what you believe, and that's a forum. I do wonder where you get some of your ideas from. Either we're from different universes where physics are reversed, or one of us is spouting pure rubbish.

It's left to the reader to decide which is which, as always. Have a good one!

It not not as much as what i believe, but more Industry proven fact and practice.

http://www.soundsolutionsaudio.com/forum/i...?showtopic=7168 is a fantastic write up on the use of polyfill.

And again, with proper install, you should not be able to tell the difference between a 10 or a 15. I have helped design boxes for SEMA shows that blew people away. We had a single 8 hidden. We would get audio professionals in the car and ask them what we had playing, most of the time they said a single 15 or a couple 12's...

Wrong. We had a single 8" in a clamshell horn that we call the phase box.