Help On Box For 15" RE MT

[x2o 10+ year member]

To the top, might try to get this box built this weekend as I have a whole sheet of MDF here just teasing me. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[x2o 10+ year member]

Well, I happened to get sick on friday night (worst night to get sick...) so I wasn't able to get the box built this weekend.

That leaves me another week or two to get some suggestions!

I'd prefer suggestions from people that have either run an MT or built a box for one, I'm not made of money and it takes me a few tries to cut straight usually so I use more MDF then the next guy. //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

Thanks for all the help so far guys //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[x2o 10+ year member]

Throw in a bump before I hit the hay.

 

[x2o 10+ year member]

Bump, I'm guessing I should try a smaller box?

I just need a general idea, bigger or smaller?

 

[davidt487 10+ year member]

I'm no expert but my sx like lower tuning I'm about to go down to 31hz it sounded fine at 36 but just didn't get low enough

 

[skadude016 5,000+ posts]

4.5 @32hz with 70sq inches of port

 

[x2o 10+ year member]

4.5 @32hz with 70sq inches of port

Okay, I will think about this one. I'm really looking for a lower tuning then 35 so this may work. I can probably go up to ~6 cubes, and am considering reconing the MT to an 18" if it blows and going with a nice big 18 and a big box tuned low.

Not 100% positive though, so many choices!

Thanks for the heads up David, I mean it gets loud at 35 right now, but I'm not competing due to the d3100 pputting me in a ridiculous class, so I'm going for a nice low pounding daily box. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[davidt487 10+ year member]

go buy 3 or 4 bags off polyfil and put in your box now that will give you an idea of how it will sound in a larger lower tuned box

 

[x2o 10+ year member]

go buy 3 or 4 bags off polyfil and put in your box now that will give you an idea of how it will sound in a larger lower tuned box

I never did understand the whole polyfill thing, anybody care to explain? I'm searching around now but idk.

 

[davidt487 10+ year member]

basicly it slows down the air inside the box making everthing seen bigger

 

[x2o 10+ year member]

Hm, I guess I'll give it a try. Problem is the box is already assembled, I'm guessing I'd have to pull out the sub and like staple it or something to the interior walls? I doubt having polyfill flying around the box and all up in my voice coil can be safe. haha.

Thanks for the help David

 

[mlstrass 5,000+ posts]

If trying to bring out the lows go bigger on volume and lower on tuning, but 35hz is about as low as I'd go for an MT. I did an 18 at 35Hz and it was INSANE on the lows...

 

[x2o 10+ year member]

If trying to bring out the lows go bigger on volume and lower on tuning, but 35hz is about as low as I'd go for an MT. I did an 18 at 35Hz and it was INSANE on the lows...

Yeah I realize these aren't really SQ drivers meant to slam 20hz, but right now I'm not really feeling 28-32 hz much. I think it may be my box is small. After displacements and such I think it's at like 3.7 cubes. //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

I'm thinking of trying 4.5 next tuned at 34. Sound like a good idea..?

 

[x2o 10+ year member]

Hows that look? 4.6 cubes tuned to 34 with 72 sq inches of port?

 

[iamamp3pimp 5,000+ posts]

Yep, as a lot of you may know, I have a 15" MT being run off my GP3k in my trunk. Right now my box is about 4 cubes tuned at 35, and I think it could get much louder.
So, my question is, what do you guys think I should try my next box at? I've heard from another guy with a Mazda 6 that a crx box (sub up, external aero ports firing back towards the trunk) gets the loudest in this car, and am considering doing that.

But, as for your input, what air space and tuning do you guys think I should go for? This is a daily driver, so I'm thinking of tuning between 30-34, but I'm not sure if 4 cubes is ideal for this sub for daily or what.

Thanks in advance all //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

what kind of car?

i got my boy with an mt 18 on 1500w 146.5db @ 46 hz so......