BobS!

It is not all about speed.

The PO of my 88 put in a hell of a sound system including a 10 sub-woofer in spare tire well shrouded in particle board under a plywood read deck supported by pressure treated two by six supports (not on edge).

I blew the sub-woofer playing Michael W Smith, yup Christian music with plenty of low end … and I always thought the particle board and plywood was not right for a Porsche … so I made a foam cored composite rear deck and subwoofer enclosure some time ago. It is very light weight and otherwise quite functional but ugly.

I freed up the spare tire well so I can have a spare tire, call me old fashion.

That is when I go my hands on some black walnut veneer.

Now it is light, functional and looks better.

I have not done any engine upgrades or other interesting stuff but I thought this was something to put out there for 928ers to have a look.

danglerb

MDF is my preferred base material, medium density fiberboard. If you use a plywood make sure its void free, or it can buzz.

That looks like its going to be pretty loud.

BobS!

This stuff weights ounces not pounds. The wood is only a veneer.

Randy V

You blew out the original sub playing Christian music?

Loud music makes baby Jesus cry.

BobS!

Given what I started with, a big stereo, plywood and carpet ... I could use the old piece of carpet on the deck as I have been for years or I could try this. I have the veneer. The woofer had to someplace ...

Some folks put wood bits all over there dash.

Beauty is more that skin deep. What you see is very light. The structure weighs about as much as that piece of carpet.

Imo000

This is one of the ugliest sub installs I’ve seen in a 928.

Randy V

Don't hold back, Imo - tell us how you really feel, ya insensitive punter...

atb

It "looks" like it would sound killer.

With the hatch closed and a luggage cover (guess it would have to be perforated to keep from slapping the headliner ) on it, whose going to see it?

atb

Imo wrote:

Dude, you need to get out more. I've seen some that will cost you your lunch. BobS! is the Mona Lisa in comparison.

Shane

ew928

Wonder how the dual sub box would look with it mounted sideways against the rear seatbacks? That way those esoteric oxygen free copper wires folks can't complain about the how the rear sub signal path has to go that much further than the front woofer.
Is the box currently sealed or running ported?
Had a 1 cubic foot ported with single 10" in my old car and that can give a nice boom.

Ernest (NYC) 10" DVC single in a leaky spare tire well enclosure.

atb

Found a pic of my sub/amp install:

Imo000

I saw your coment on those multi spoke wheels from e-bay too you know!!!

Imo000

That's exactly how I have the subs in the '85. The box slopes towards the rear (same angle as the hatch glass). The amp is in the spare tire well with a small PC fan pushing air on to it. The box is almost as wide as the trunk and it fits snuggly under the read sear back lip. There are 2 - 12" subs in the box, facing the hatch glass and is covered with dark grey speaker carpeting. It's a perfect fit for a 928. looks good and goes with the lines of the car. The best part was that I found it in nearly new condition at the local pawn shop around 7 years ago.

0utlier

My amp is too big for the spare tire well, but I do have the box sloping the same angle as the glass, and I also had it recovered to match the seats. It puts out thunderous lows, but is surprisingly quiet outside the car as it roars inside. I think I'll have another box made at some point that goes from end to end and conforms to the car a little better, but for now this is just fine for me.

As for the OP, I would turn the box and see what that looks like. To each his own though.