Custom Subwoofer Enclosure and Amp Installed

[m5james]

Originally Posted by KidSquid

I was going to build a wood box, but thought I could never maximize the airspace that the factory plastic box has.

I measured the volume and I believe it was around .53~.55 cu ft so it was a perfect fit for an 8" woofer.

Cut the face of the box off, fit a piece of MDF to it, fiberglass'd it on, and bolted in the subwoofer.

Just did a quick and dirty job cause no one will ever see it.

I was so tempted to stuff a 10" woofer in there.. but it would have been choked.

Sounds great... hits harder than I ever thought an 8" would.

I highly recommend it!

So I got a (free, minus $20 shipping) stock enclosure in the mail today, figured out how BMW wired the DVC subs by battery testing the signals, and hooked it up into the X using my current amp....WHAT A JOKE!!! My current dinky little generic 8 that was given to me sounds better than this thing! I'll give BMW credit for using DVC subs, but dual 6.5's...c'mon. So anyways, I felt around the box, and I can't believe how much wasted space there is around the enclosure. The back of the box got cracked in a corner during shipping, along w/ me needing to fiberglass the MDF face on anyways, but I'm thinking that I'm also gonna fiberglass these indentations and make them bigger as well. It's already got foam type stuffing in there...should I remove it and use real polyfill?

The L5 8" wants like .33-.75 airspace, and even though you said it measures out to like .5, but bigger the better, right? For those who don't have this enclosure, the 1st pic is where the airvent is for closing the hatch/door so you're ears dont pop. There is still plenty of room behind it if I unrecessed that and made it flush w/ the rest of the enclosure. The 2nd pic is for the fuel door locking mechanism, which I removed long ago when I was still fabricating a box from MDF and trying to find as much space as possible. The 3rd pic, I have no idea what that's for and it's not touching anything. The 4th pic is so you don't have to remove the enclosure to get access to the taillight bulbs. I'd rather go for the greater good and get airspace that I can use daily over function that I use once every couple of years. I know it'll be more work, but I still wanted your .02 before I started fiberglassing this week.

[DocMike]

Why not make a negative 2 piece mold of this , fill in the area you want to expand, then lay it up with fiberglass, 100% with a 1/4 baffle

Originally Posted by m5james

So I got a (free, minus $20 shipping) stock enclosure in the mail today, figured out how BMW wired the DVC subs by battery testing the signals, and hooked it up into the X using my current amp....WHAT A JOKE!!! My current dinky little generic 8 that was given to me sounds better than this thing! I'm surprised BMW used DVC subs, but dual 6's...c'mon. So anyways, I felt around the box, and I can't believe how much wasted space there is around the enclosure. The back of the box got cracked in a corner during shipping, along w/ me needing to fiberglass the MDF face on anyways, but I'm thinking that I'm also gonna fiberglass these indentations and make them bigger as well. It's already got foam type stuffing in there...should I remove it and use real polyfill?

The L5 8' wants like .33-.75 airspace, and even though you said it measures out to like .5, but bigger the better, right? For those who don't have this enclosure, the 1st pic is where the airvent is for closing the hatch/door so you're ears dont pop. There is still plenty of room behind it if I unrecessed that and made it flush w/ the rest of the enclosure. The 2nd pic is for the fuel door locking mechanism, which I removed long ago when I was still fabricating a box from MDF and trying to find as much space as possible. The 3rd pic, I have no idea what that's for and it's not touching anything. The 4th pic is so you don't have to remove the enclosure to get access to the taillight bulbs. I'd rather go for the greater good and get airspace that I can use daily over function that I use once every couple of years. I know it'll be more work, but I still wanted your .02 before I started fiberglassing this week.

[m5james]

Originally Posted by DocMike

Why not make a negative 2 piece mold of this , fill in the area you want to expand, then lay it up with fiberglass, 100% with a 1/4 baffle

I've never laid fiberglass, so I think it's going to enough work for me just to cutoff the face to mount the MDF piece, along w/ the areas I wanna expand...I'm just trying to make sure I make the cuts in the right places, then lay the fiberglass just right so that it lays over the new shapes the way I'd like it to.

[Kerr]

I place the jL stealth box in my 4.8 ans it pounds I love it but the cover rattles like crazy does anyone have any suggestions to mod this cover to avoid rattles?

[m5james]

Originally Posted by Kerr

I place the jL stealth box in my 4.8 ans it pounds I love it but the cover rattles like crazy does anyone have any suggestions to mod this cover to avoid rattles?

Sending you in circles to your own thread http://www.xoutpost.com/bmw-sav-foru...d-rattles.html