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Re: Trunk acoustics (stereo question) (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by Peter Warton on March 30, 2000 at 12:25:37:

In Reply to: Re: Trunk acoustics (stereo question) posted by Eric S. on March 29, 2000 at 20:02:34:

Eric - how much noisier was your car after punching out the ski-sack hole? My 525 Touring is quite a bit louder than my 535 sedan, and I'm wondering if it's because all the rear-wheel and muffler noise isn't blocked by a real trunk.

For your Touring owners - has anyone removed the spare and put a nice sub in there? Seems like the ideal solution (I suppose for sedans too) - it's about, what, a 20" diameter, 10" deep hole? That's:

(radius^2 * pi * height) / (cu inches in cu foot)

which in this case is:

(10^2*pi*10)/(12^3)

which works out to ~1.8 cubic feet. You could put a nice 10" or 12" low fs, long excursion, high Qts woofer in there (that doesn't mind facing up), stuff it, seal it, and get excellent deep, controlled bass. Surely someone's done this? How did it work out?

Peter

: I knocked the plate covering the rear seat pass thru out. My 91 535 didn't come with a ski bag so it just had a partially cut out plate blocking the opening. I cut it out and I am planning on replacing the plate with some sort of meshed metal material. If I need to return it to stock then I'll just buy the ski bag apparatus and put it in. In order to get full bass performance I drive with the rear seat armrest in the down position. This solution works well and there is no permanent damage.




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