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View Full Version : Help On Box For 15" RE MT



x2o
08-31-2008, 12:20 PM
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 :)

x2o
08-31-2008, 08:04 PM
http://www.ricesigns.com/real_pictures/bump_signs.jpg

bones22
08-31-2008, 08:05 PM
try 4.5 cubes
@ 38hz

x2o
08-31-2008, 08:07 PM
try 4.5 cubes
@ 38hz

Will consider this but I'm not really going for numbers as the d3100 gets me bumped from street classes, just going for more of a daily musical box that can get low and loud.

bones22
08-31-2008, 08:08 PM
Will consider this but I'm not really going for numbers as the d3100 gets me bumped from street classes, just going for more of a daily musical box that can get low and loud.

personally i like 38-40 for daily/music
my 4 15s were loud as hell and played music very well

x2o
08-31-2008, 08:10 PM
personally i like 38-40 for daily/music
my 4 15s were loud as hell and played music very well

Oh hm I didn't people tuned that high up for music and liked it. I'll give it a try depending on what else gets suggested in here :).

Thanks for the replies bones, and how much port area should I be going for with the MT? I think I'm around 60 sq inches now.

bones22
08-31-2008, 08:14 PM
Oh hm I didn't people tuned that high up for music and liked it. I'll give it a try depending on what else gets suggested in here :).

Thanks for the replies bones, and how much port area should I be going for with the MT? I think I'm around 60 sq inches now.

60 or so would be good
no more than maybe 75sq"

x2o
08-31-2008, 08:16 PM
60 or so would be good
no more than maybe 75sq"

Alright cool thanks. :veryhapp:

x2o
09-01-2008, 11:41 AM
http://i168.photobucket.com/albums/u197/TheDivineRose_11/thbump.gif

x2o
09-01-2008, 08:26 PM
http://images.starcraftmazter.net/4chan/for_forums/bump.jpg

x2o
09-02-2008, 11:35 AM
School bump :)

InhumanAcura
09-02-2008, 01:00 PM
what kind of vehicle?

id try less volume

thegreatestpenn
09-02-2008, 01:08 PM
3.5cu.ft. tuned to 40 Hz. It won't slam the low-lows, but it'll still be good and get much louder. If that's too high a tuning try 37Hz instead. As for box config, is that a hatch car? do ports up sub toward cabin

x2o
09-02-2008, 01:17 PM
It's a 4 door car with a trunk, from what other's with this type of Mazda 6 have said sub up external aero's back were the loudest, but I'm not too sure about that.

I can build anything <4.5 cubes externally and wedge it in the trunk, so I'm willing to try anything <4.5 cubes I guess. I'm really not going for numbers with this box, just a daily that can pound some lows :).

I'm interested in trying that 3.5 @ 37 though.

x2o
09-03-2008, 11:21 AM
School Bumping :D

x2o
09-04-2008, 07:09 PM
To the top, might try to get this box built this weekend as I have a whole sheet of MDF here just teasing me. :)

x2o
09-07-2008, 08:14 PM
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. :crap:

Thanks for all the help so far guys :D

x2o
09-08-2008, 12:00 AM
Throw in a bump before I hit the hay.

x2o
09-08-2008, 11:24 AM
Bump, I'm guessing I should try a smaller box?

I just need a general idea, bigger or smaller?

davidt487
09-08-2008, 11:37 AM
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
09-08-2008, 11:44 AM
4.5 @32hz with 70sq inches of port

x2o
09-08-2008, 11:46 AM
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&#37; 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. :D

davidt487
09-08-2008, 12:04 PM
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
09-08-2008, 12:28 PM
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
09-08-2008, 12:34 PM
basicly it slows down the air inside the box making everthing seen bigger

x2o
09-08-2008, 12:38 PM
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 :P

mlstrass
09-08-2008, 12:40 PM
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
09-08-2008, 12:42 PM
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. :crap:

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

x2o
09-08-2008, 03:15 PM
http://img113.imageshack.us/my.php?image=possibleboxdesignsk2.jpg

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

iamamp3pimp
09-08-2008, 03:21 PM
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 :)

what kind of car?

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

x2o
09-08-2008, 03:26 PM
what kind of car?

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

Car is a 2003 Mazda 6 S (trunk, not hatch)

Someone here said they had the same car and got loudest with subs up and external aero's back (CRX Box), but I have yet to try that. May consider though if I can fit my friend's box for his 18" BTL in my car as his box is sub up port back and that'd be a good way to see if it's much louder.

mlstrass
09-08-2008, 05:06 PM
http://img113.imageshack.us/my.php?image=possibleboxdesignsk2.jpg

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

that box looks good. you must listen to a lot of the new rap crap if wanting it to drop that low :D

skadude016
09-08-2008, 05:08 PM
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...

I know with my 18" 24hz-30hz its just insane. in my 6.5 cube box tuned to 30hz

ls2poweredgoat
09-08-2008, 05:10 PM
I hope I get to build this up and coming box. :)

peas247
09-08-2008, 06:04 PM
i got a 18" MT in a 2002 mazda protege in 5.7 cubes tuned at 31hz, sub up port to passenger side. it slams the lows and sounds pretty f'n good. straight built for a musical daily box, could careless about numbers

x2o
09-08-2008, 08:01 PM
that box looks good. you must listen to a lot of the new rap crap if wanting it to drop that low :D

Haha I listen to a wide variety of music. Rock / Trance / Dance / Techno / DnB / Rap / etc. I figure a lower tuning will be more musical over the wide spectrum of things I listen to. But mostly I listen to rap, and yeah I play some of the new crap just to be known as the kid who gets it first around here :p:

But yeah, I think I may try that box. First I'm gonna swap in for my friend's 18 BTL and see if it's a huge difference to see whether I should tune lower or what. He's tuned at 33 I think.

x2o
09-08-2008, 08:01 PM
I hope I get to build this up and coming box. :)

:D Hopefully. :p:

x2o
09-08-2008, 08:06 PM
i got a 18" MT in a 2002 mazda protege in 5.7 cubes tuned at 31hz, sub up port to passenger side. it slams the lows and sounds pretty f'n good. straight built for a musical daily box, could careless about numbers

I was considering porting to the side as I see a lot of people have been doing this lately, but I'm not sure.

Apocalypse boy
09-08-2008, 08:06 PM
:wave:

x2o
09-08-2008, 08:11 PM
:wave:

:bigwave:

Haha. Any suggestions lino? :p:

JB513
09-08-2008, 10:10 PM
Let me know what you decide to go with. I too am almost ready to start building my box for my 15" MT. I want it to hit the lows and sound good for daily. Not sure how much room i have in the trunk of my 2002 accord. So who knows let me know what your liking with your box.

peas247
09-08-2008, 10:12 PM
I was considering porting to the side as I see a lot of people have been doing this lately, but I'm not sure.

first time i tried it and i am pleased with it

iamamp3pimp
09-08-2008, 11:37 PM
i tried it once tuned @ 25 hz in a 2.9 cube box for the 15 inch uberwoofer.

was really nice on the lows, but 45 and up ****** a lot.

x2o
09-09-2008, 11:34 AM
Let me know what you decide to go with. I too am almost ready to start building my box for my 15" MT. I want it to hit the lows and sound good for daily. Not sure how much room i have in the trunk of my 2002 accord. So who knows let me know what your liking with your box.

Yeah man no problem, will be sure to let you know.

And mp3pimp, I would be doubtful tuning the MT that low :p: IMO the only time to go below 30 is for home theater. Some people disagree, but thats my opinion :P.

orangecounty1
09-09-2008, 12:10 PM
i tried it once tuned @ 25 hz in a 2.9 cube box for the 15 inch uberwoofer.

was really nice on the lows, but 45 and up ****** a lot.

lol i remember that box, with my sub.. in transition from neon wall v1 to neon wall v2 :D

x2o
09-10-2008, 09:46 AM
Bump...

Well yesterday I swapped in my friend's 18" BTL (5 cubes around 33-35hz) sub up port back and it moved a CONSIDERABLY larger amount of air then mine. Plus his box was kinda lame, small port for the box size and bad construction. (Yeah lino, I'm making fun of your box :D)

So now I think I am going to try a sub up port back for the 15" MT, and if I still don't like it I'm going to play it far below tuning with no SSF, blow the soft parts, and get a 6-spoke 18" basket and recone.

Any thoughts on this? Also, if I go with a 6-spoke basket, I realize I'll need a recone to fit the basket. Will getting a different cone/spider/etc setup change any type of power handling or anything? I'm not too worried about changing the t/s parameters as I never had them anyways. Haha.

Thanks!

x2o
09-10-2008, 11:33 AM
Also, if anybody has a 6-spoke basket that would fit the MT/BTL bolt pattern, PM me!!! :D

Bumping up before I switch classes. Hopefully I come to a thread full of new posts in Web Design! :veryhapp:

x2o
09-11-2008, 10:20 AM
Hm, well guys, how much air space should I be going for with an 18" MT?

I have some plans drawn up for 5.2 cubes after with 4 4" Aero ports tuned to 35 Hz.

I'm in class and don't remember if it was 5.2 AFTER port displacement or before... I'm 95% sure it was after port displacement though.

How does this sound? More/less airspace?

skadude016
09-11-2008, 11:33 AM
aint much room for an 18. it will do well on the upper frequncies but low end aint gonna be that good.

mlstrass
09-11-2008, 12:18 PM
did one for a guy last year, 8.5cubes @ 35hz and it slammed the lows and did around a 147 @ 33hz...

x2o
09-11-2008, 04:16 PM
Hm good to know. I can't get to 8 cubes likely without building in the trunk (which I don't wanna do) but I can get more space definitely. I wasn't sure how much space to give an 18.

I can probably do 6-7 cubes though, I'll measure it out sometime soon :)

iamamp3pimp
09-11-2008, 05:00 PM
lol i remember that box, with my sub.. in transition from neon wall v1 to neon wall v2 :D

wrong box

that box i sold before i ever met you

iamamp3pimp
09-11-2008, 05:01 PM
aint much room for an 18. it will do well on the upper frequncies but low end aint gonna be that good.

thats not true at all....

somehow my buddies tuned to 36 is crushing the lows.

iamamp3pimp
09-11-2008, 05:02 PM
Bump...

Well yesterday I swapped in my friend's 18" BTL (5 cubes around 33-35hz) sub up port back and it moved a CONSIDERABLY larger amount of air then mine. Plus his box was kinda lame, small port for the box size and bad construction. (Yeah lino, I'm making fun of your box :D)

So now I think I am going to try a sub up port back for the 15" MT, and if I still don't like it I'm going to play it far below tuning with no SSF, blow the soft parts, and get a 6-spoke 18" basket and recone.

Any thoughts on this? Also, if I go with a 6-spoke basket, I realize I'll need a recone to fit the basket. Will getting a different cone/spider/etc setup change any type of power handling or anything? I'm not too worried about changing the t/s parameters as I never had them anyways. Haha.

Thanks!


less spiders reduce the mechanical power handiling, but other than that, no,...

orangecounty1
09-11-2008, 05:10 PM
wrong box

that box i sold before i ever met you

oh? when did u ever have a 15" mt before u met me? and not those SP wanna be MT things.

x2o
09-11-2008, 05:12 PM
less spiders reduce the mechanical power handiling, but other than that, no,...

Sweet, thanks for the info mp3pimp.

And all the bumps between you and orangecounty :p:

BTW orangecounty, great work on the mini so far, looks like it'll be awesome when all is said and done. :)

x2o
09-11-2008, 05:13 PM
thats not true at all....

somehow my buddies tuned to 36 is crushing the lows.

You said your buddy's that was tuned to 36 slams the lows? What size box does he have? I'm not sure whether you were pointing out that tuning to 35 was OK or that 5.2 cubes was fine. :p:

Thanks

iamamp3pimp
09-11-2008, 05:56 PM
i built him a box for an 18 mt thats 3.7 @ 36 hz with 80 or so squares of port

x2o
09-11-2008, 05:59 PM
i built him a box for an 18 mt thats 3.7 @ 36 hz with 80 or so squares of port

Holy tiny box batman!! :eek::eek:

Why so small? Should I be aiming for something that tiny? Haha

iamamp3pimp
09-11-2008, 05:59 PM
oh? when did u ever have a 15" mt before u met me? and not those SP wanna be MT things.

i didnt

i had the uberwoofer

flare ported to the side

x2o
09-11-2008, 06:00 PM
i didnt

i had the uberwoofer

flare ported to the side

:crap: I'm not sure if I should ask what the uberwoofer is... haha.

iamamp3pimp
09-11-2008, 06:02 PM
Holy tiny box batman!! :eek::eek:

Why so small? Should I be aiming for something that tiny? Haha

nah, thats just all the room he had, and i had the sub sittin in my room

so i built it for him, he liked it, so i sold him the sub.

its not optimal, but it moves his car around a lot on 1500w



http://www.youtube.com/watch?v=kZgWjK8gW-g

iamamp3pimp
09-11-2008, 06:04 PM
:crap: I'm not sure if I should ask what the uberwoofer is... haha.

or was

i blew that ***** apart like you wouldnt believe.....shattered the alum cone


it was a special long coil made by tc soun ds back in 03 or 02 or somethin

x2o
09-11-2008, 06:04 PM
nah, thats just all the room he had, and i had the sub sittin in my room

so i built it for him, he liked it, so i sold him the sub.

its not optimal, but it moves his car around a lot on 1500w



http://www.youtube.com/watch?v=kZgWjK8gW-g

Ah okay then, makes sense. :p:

What do you think is 'optimal' space for an 18 MT? (will be getting 2-3kw)

x2o
09-11-2008, 06:05 PM
or was

i blew that ***** apart like you wouldnt believe.....shattered the alum cone


it was a special long coil made by tc soun ds back in 03 or 02 or somethin

Oh haha okay, **** sad to see another TC moofa fall to the alum cone :(.

I was expecting some terrible woofer that was pieced together (RE LAMARE anyone??) :p:

iamamp3pimp
09-11-2008, 08:04 PM
oh no, it was a thing of beauty, until it failed.

iamamp3pimp
09-11-2008, 08:04 PM
was it a 18,. or a 15 MT

x2o
09-11-2008, 08:13 PM
was it a 18,. or a 15 MT

My MT? Right now it is a 15, but I am reconing it to an 18 soon.

twisztdauthorit
09-11-2008, 08:15 PM
Anyone have any opinion on what type of box would be optimal for an 18" mt receiving upward of 3-4k watts for daily?

x2o
09-11-2008, 08:23 PM
Anyone have any opinion on what type of box would be optimal for an 18" mt receiving upward of 3-4k watts for daily?

None IMO, even I was told the MT wouldn't handle my GP3k for daily. And when playing full tilt on a Jeezy song or something similar with a constant note it will get stinky after a song or two. I wouldn't put that much power to it for daily, in any box :crazy:

iamamp3pimp
09-11-2008, 10:46 PM
Anyone have any opinion on what type of box would be optimal for an 18" mt receiving upward of 3-4k watts for daily?

has the suspension loosened up on it a lot?

or is it still really stiff?>

iamamp3pimp
09-11-2008, 10:50 PM
yeah its gonnna be hell on the coils, thats for sure


try smaller w more port

try the 15 in a 2.7 if ya still got it

2.7 w 65/70 squares

be fun to build and learn from.....tuned @ 35

twisztdauthorit
09-12-2008, 12:40 AM
has the suspension loosened up on it a lot?

or is it still really stiff?>

suspension is still pretty stiff on it. (its taken a beating too)
Its running with a juggernaut recone on it but i was told it can take around 4k daily.

I was thinking about running 2x6" aeros this time too

iamamp3pimp
09-12-2008, 12:41 AM
oh, well then its not an MT

i dont know what it'll do...lol

skadude016
09-12-2008, 01:05 AM
thats not true at all....

somehow my buddies tuned to 36 is crushing the lows.

weird.... hm. I know mine in 6.5 cubes tuned to 30hz does real well from 26-32hz then from 33-39 seems to be lacking...

twisztdauthorit
09-12-2008, 01:15 AM
oh, well then its not an MT

i dont know what it'll do...lol

but still got an mt motor:laugh:
I like sub and port up in the back of a truck but am thinking bout going sub up port side or something =/ I dont want my door to bust off or anything though.

x2o
09-12-2008, 09:48 AM
yeah its gonnna be hell on the coils, thats for sure


try smaller w more port

try the 15 in a 2.7 if ya still got it

2.7 w 65/70 squares

be fun to build and learn from.....tuned @ 35

Hm... Okay :p:

That seems so..so..tiny. It would be fun to try though I guess. And I 'd gain a lot of trunk until I get the 18. Maybe I'll give that one a build this weekend :)