Luke's Box with an M3 rear bench? NE1?

[mrbobian]

It is called "compromise" my man...I just like the ones I pick, best.

I do cut out 3" or so of foam on the heavy leather, cloth and M3 seats, only where the ski pass is. It makes a huge difference.

I hear ya there... When you say cut foam do you mean cutting about 3'' depth into the seat about the size of the ski pass cutout? I think I will be having to do this since I don't want to cut holes in my rear deck or can source a armrest rear seat by me...

[Massive Lee]

Interesting thread that's giving me ideas. I have BMW's premium speakers and a nice Pioneer head with 4 x 45w amp and all sorts of sound shaping gizmos. Sound is good, but I feel I need more nbottom... I also have two pairs of Kef B138 "racetrack" woofers and could used one or two to add bass.

One spare set is 4 Ohms, the other is 8... Hmm.. ;-)

[StereoInstaller1]

I hear ya there... When you say cut foam do you mean cutting about 3'' depth into the seat about the size of the ski pass cutout? I think I will be having to do this since I don't want to cut holes in my rear deck or can source a armrest rear seat by me...

I cut the foam out from the backside...bummer I don't have a pic!

I will tell you this: using one of my normal ported 10" boxes and an infinity 1030W (typically $50ish) on a pioneer GM3300T (maybe 150 RMS on a good day, about $75ish?) I got plenty of bottom end, like about 125ish DB at well below 30Hz...and it weighed about the same as the trunk tar I pulled out, and the depth at the top of the box is 4"...with superb quality of sound.

[svn2002s]

I am going to build two boxes and compare the sound. The first one, something similar to Luke's box and the second one with the ports pointing up to the speaker holes on the rear shelf.
I won't be removing any foam from M3 rear bench. (I'll be running a dedicated sub amp with a 10 in. Jl Audio). I'll post my opinion on both setups.

[StereoInstaller1]

I have shipped a couple of boxes down to "the bay area" (might even be one in Walnut Creek?) so see if you can find someone near you to compare to.

The big trick is getting 100% of the output form the sub into the car. That is where every single attempt at copying my work has failed.

I can tell you guys this: I am gonna try to find time to re-do mine before the picnic this year. If so, all y'all gonna be pissed!