edco

Hey Guys,

I picked up my 928 and everything was in good order! Except for a badly broken front drivers side tweeter which was hanging out of the door This piece is not available, well at least I could not find one. So I started thinking of a way to fix this issue.

The car is a 91 S4 "10 Speaker System"

Parts List

1 - 2 1/2 to 2 inch Reducer Ring "Available at any electrical supply store for $1.00"

4 - #8 Sheet metal screws "I used flanged so I could counter sink the screws”.

1 Can Krylon flat black paint.

I simply drilled 4 holes in the ring, and then using a larger drill bit countersunk the holes slightly. This was in hopes to allow room for the grill to have enough clearance. It did not quite fit, so I used a bench grinder to remove "Grind Off" a little bit of the top or the screws.

I placed the ring over the broken mount to sandwich the whole thing together and popped on the grill 15 mins of work and it looks to be fixed for the long haul...

Hope this helps someone with a broken mount, now you can all tell me where I can just buy a replacement mount

Bill Ball

Cheap, fast and effective. As the saying goes, pick two. You got all three! Good work, Matt.

MBMB

Matt,

As far as I can tell, there are no replacement brackets to be found. Your repair looks good, and will certainly last until I get a batch of replacement brackets machined to carry MB Quart 25-mm tweeters.

SharkSkin

Excellent work! It's amazing what you can accomplish if you can paw through the right hardware bin.

Nicole

Great fix!, especially since it looks lilke the speaker grille still fit over it.

...or you could have gotten the tweeter from the 90 GT that DEVEK is parting out right now.

Donald

I just need the trim ring for the tweeter........

cobalt

The MB quart tweeters fit perfectly using the supplied components and the factory bracket. Just use the flush mount braket supplied with the tweeters and the metal spring clip and screw. Bend the spring clip to extend out slightly inset into factory bracket and tighten screw. I installed both the tweeters and mid range using the factory grills.

aircooler

I have a whole bunch of 928 factory speakers (and a tweeter), factory grills, left over MBQ grills + mounting hardware, and a couple of radios etc.. that I will putting on ebay in the next day or so.

I'll be listing all the stuff cheap, + discount for rennlisters.

I will post a link when I get the stuff up.

Cheers,
Michael

Bill Ball

Many 3/4-1" tweeters will fit the front ring. The stock tweeters snap in from behind. As Cobalt mentions, you use the mounting bucket and retention strap provided with the aftermarket tweeter and fit from the front instead. Here's an Audiobahn tweeter dropped in and held in place from behind. Not all will fit, so you have to be a bit lucky as exact dimensions of the buckets in aftermarket speaker kits usually are not available. The common MB Quarts are good.


In the rear, the center of the tweeter ring protrudes a bit. With an aftermarket tweeter dropped in from the front, the stock grill cannot fit anymore. So, I flipped the ring and dropped in the tweeter with it's mounting bucket. Here's an MB Quart showing front (with ring flipped) and rear. Of course, with the trim ring flipped, the grill cannot clip on. I used some small industrial velcro strips inside.

Sagres74

Bringing this thread back from the dead. Been experimenting with a few different techniques to fix my tweeter brackets.

For the first attempt I used good ol' standard J.B. Weld. Although a bit too fluid, it dried nicely especially with some clear packing tape in the back to hold the product. I actually thought the J.B. Weld would have burned through the tape but, to my amazement, it actually formed flush with the back of the bracket requiring no sanding.

On the second attempt, I used J.B.Weld Plasticweld epoxy (the white substance). It is easy to mix, dries quickly, but due to the plastic compound in the epoxy, it's a bit of a pain to sand lightly. I ended up using my Dremel with a cutting wheel for plastic to trim it down.

Still not perfect but better than how I found it. I'll continue to tweak it and, once satisfied, I'll likely give it a quick resp ray. Thoughts?

Andre The Giant

Great job Edco. That is using your noggin !

MBMB

Hi, friends. Long time no see.

For more than a decade, I've been working on and off on a solution to this problem. Now, with the purchase of a 3D printer, I think I have it.

This is a door tweeter enclosure (the tweeter fires forward at a 20º angle, apparently to bounce the sound off the windshield) sized for an MB Quart 25 tweeter. It's set up for gluing the tweeter in, but before I finalize it I'll probably make the tweeter snap in.

Anyone need one? Any improvements you'd like to see?

MB

CAD drawing of 928 door tweeter enclosure.

buccicone

MBMB

Here's a near-final (possibly final) draft. The MB Quart 25s snap right in. I'm going to install it, and if all fits well get a couple made up in nylon (instead of the current PLA, which looks rough and is not be very durable):

hans14914

If it helps, I still have a couple hundred pairs of tweeter mounts/grills from the speaker kits I made a couple years ago.