Luke: Box specs?

[dude8383]

P.S. - How important is sealing the box from the inside with caulk? Can you really notice a difference?

I say that its quite crucial because caulk will create an air tight seal!

[Aptyp]

I've been wanting to make this drive for a while. I need to put my dirty through this test... Maybe encourage some others along the way to come with.

I have been wanting a sub in the car for a while. I don't want a lot of bass, but I'd like to have crisper sound that drowns away my urethane suspension.

[AndrewBird]

Soon, the weather is getting better.

I wonder how my neighbors would feel about me building in my back yard, under the awning?

I say it's your back yard, do what ever the fuck you want! ;)

Oh, and thanks for the sticker shout out!

P.S. - How important is sealing the box from the inside with caulk? Can you really notice a difference?

[StereoInstaller1]

If I drive to the Picnic this year, I'll pick one up.

Are you seriously thinking about it?

[Aptyp]

If I drive to the Picnic this year, I'll pick one up.

[StereoInstaller1]

Soon, the weather is getting better.

I wonder how my neighbors would feel about me building in my back yard, under the awning?

[E30Nova]

Yeah, so get to crackin on another run! ;)

Matt (please? :D)

[Aptyp]

Luke, you're awesome, and when I decide to get one, I'll buy it from you.

[StereoInstaller1]

here are a coupe of pics that might help:

Inside the box:


An army of boxes:


Better detail of the face:


AAaaaaaand a bitchin sticker that Andrew made me:

[StereoInstaller1]

Mike, if I could actually draw the box out for you, I would. It is still a "cut and fit" proposition,. even though I use templates and such, I don't know the measurements!

The outside specs are:
W: 36"
H: 15" (dead nuts on, taller or shorted and you have issues)
Bottom Depth: 10"
Top Depth: 4"

If you build out of 3/4 MDF, that will give you a gross air space of 1.5 cubic feet.

The woofer is offset by a couple of inches, as the trunk is offset. There is a big old wire running down the left side and that is a bit of an issue...so if you get to measuring and find your woofer having an 18" C/L, it is WRONG!!!

Now, let me warn you: I will not divulge all of my tuning info. Hell, I have 20 years into learning how to make awesome bass in an E30...but WTF, have at it.

I can tell you this: if you can find a woofer that will handle over 25 watts RMS in a box tuned to 27Hz in an E30, I will be shocked. Your old S10 with that HUGE 60Hz bump is not the same here...in fact, damn near opposite. No output from 60 to 80, then a peak at 100...but a big old bump at 40 means you tune higher than normal given the airspace.

So, if you do 2 3" ports, it isn't hard to make them adjustable. Just make the quite short (like 60Hz tuning) and then make longer tubes you can add on.

If you were to find say, an old school Becker woofer with a Qts around .19 and a Fs about 22Hz, with a VAS way the hell out there like 300 liters, I could maybe see like a tuning in the range of 30hz...but you better make that box more like 4 cubic feet!

So, in honor of you asking me to divulge my 30 years of professional experience on your very first post, tear it up!

Post pics, make me proud!

Hi all,
I'm new to this board and to E30s. I'm planning on moving my audio setup from my S10 to the ix and had drawn up a few plans for the sub then saw Luke's ported 10'' design. I was wondering if he would be willing to release the external dimensions to that as a starting place for guys like myself? I'm guessing my specs I'm hoping for are a little different to what Luke's box is built for. I'm going for ~27hz tuning. Either way, it looks like it fits beautifully up to the rear seat. I had originally planned an up-firing enclosure but like the idea of front facing a lot more. Any help would be appreciated. Thanks,

Mike B.

not to be a dick, but why would he give dimensions away if hes trying to sell them. He spent alot of time creating and determining which size is idea for us, I really don't think he'll give out info just like that, but if you ask him nice enough, maybe he will?

Hey man, that is just fine, and thank you so much for protecting my interests.

I believe in open source stuff when possible, plus all the stuff I have learned in here makes it worth it.

You are a good man!

Luke

[dashboardmonkey]

paging Stereoinstaller1

[iignite]

not to be a dick, but why would he give dimensions away if hes trying to sell them. He spent alot of time creating and determining which size is idea for us, I really don't think he'll give out info just like that, but if you ask him nice enough, maybe he will?

[mrbobian]

Hi all,
I'm new to this board and to E30s. I'm planning on moving my audio setup from my S10 to the ix and had drawn up a few plans for the sub then saw Luke's ported 10'' design. I was wondering if he would be willing to release the external dimensions to that as a starting place for guys like myself? I'm guessing my specs I'm hoping for are a little different to what Luke's box is built for. I'm going for ~27hz tuning. Either way, it looks like it fits beautifully up to the rear seat. I had originally planned an up-firing enclosure but like the idea of front facing a lot more. Any help would be appreciated. Thanks,

Mike B.