worf928

Hmmm... hopefully the subject wasn't too cryptic.

MB Quart Owners: Where did you mount the crossovers? The MBQuart crossovers are huge. Is there sufficient room in the doors and rear panel to mount them? Or do they need to be mounted in Nebraska and wires run to the speakers? Or is there some imaginative trick way to mount them close?

aircooler

Hello Dave,

I placed the rear X-overs (for my MBQ 316's) in the rear glove box. Obviously not an option if you have rear AC.

The front X-overs can fit behind the door panels. You can fab a mounting bracket for them and attach them to the inside of the door panel. There was a member here who did a nice audio upgrade, and had some pics of this on his web page. Sorry don't remember who.

Cheers,
Mike

Jim R.

Dave,

Mine are mounted in the spare tire well on a carpeted panel with the amps. Wires are run back up to the front and rear speakers. The car came this way, but I had the wiring and install cleaned up.

Jim R.

zmandan

I put my amp and x overs in the spare tire well too
I made a simple plywood platform and bolted it down using the spare tire
bolt, I have extra wire length so I can unbolt and lift out ..to get to the battery...and I left room to put a can of "run flat" and tire plug kit.
works and looks good!

check out past threads by using "search"feature.

there are very few places to put an amp and x overs in or cars.

dan z

worf928

So far:

- front x-overs will fit in doors

That's good.

Is there no way to mount the rear crossovers inside the wells with the speakers? Or is there simply not enough void space?

Ideally, I would mount the x-overs in close proximity to the speakers and drive the speakers with a high-power head unit.

If the only solution is to mount x-overs in the passenger compartment then I'm going to re-think this entire exercise (and system architecture). I would really like a minimum of wires running back and forth and all over.

Yesterday, I removed the interior - mostly for thorough cleaning - and carpets. This week I'll be removing the old speakers and front door panels. (I need to do some work in the doors anyway.) So, I have yet to see for my own eyes what's behind the speakers, panels, etc. I'm not going to acquire any components until I'm 100% sure of how everything will be installed.

Ed Scherer

I mounted the fronts to the back of the door panel.





Rears on the same piece of MDF that the amp is mounted on (all hidden by a raised rear deck).



You can also check out a lot more info on the whole installation job.

tuk_928

Sorry folks - not trying to hijack this thread but...have a related question re: MB Quart Speaker applications for the 928s4 (and later models).

Can someone please post a list of MB Quart speaker models (current or earlier) that will fit properly (with or without easy modification) for the 10-speaker system in my 1989 s4? I'm ready to upgrade the entire system...my speaker are SHOT all around...dried out....foam surrounds evaporated. The PO installed a Nevada Blaupunkt head unit but the resulting audio from the speakers is just awful. I'm not looking to do anything fancy (no subwoofer) just want to install MB Quart speakers front and rear that are the correct nominal impedance (particularly the rear seat area factory sub-woofers). I've heard that 8 ohm speakers don't do well there...need 6 ohm or 4-ohm, right? What about the other speakers for the doors and rear hatch area?

Also - I've heard that some of the MB Quart speakers for sale on eBay are COUNTERFIT....learned this from the MB Quart factory website....anyone know about this? How does one tell the real from the fake?

Cheers and thanks in advance

Tim

JPTL

Tim,
I've heard that in the later 928's (post '87?) all but the two large rear seat speakers are rated at 8 ohms. The two rears are rated a 4 ohms - I believe, so 8 ohm speakers sound crappy with the original amp/wiring/crossovers (But......take this info. for what it's worth.....3rd hand from a non-audiophile). I would look into this further before you start planning what goes where & how.
Right now, I have a Blaupunkt Honolulu going through the oem amp via a Blau/928 adapter harness from Stephen Weiss. For the 'large' back seat speakers, I have 8 ohm MB Quart's running off the oem amp. The rest are 4 JBL 8 ohm coax, the original tweeters; with stock wiring/crossovers...also running off the oem amp. Since the MB's sound crappy at the present time, the system needed more bass. Instead of using up my spare tire nook for a sub & amp, I've gone with a small plug & play Kenwood self-contained, self-powered sub that fits behind the passenger seat in the little footwell. I got the 12v power from the switched source at the amp, but the signal comes from the head unit...so it's 8 ohms. It sounds great, with very good bass, and I can unplug & pull it out in seconds to get back the footwell space (as if somebody could ever sit back there).
I'm thinking that if I can power the MB's from the head unit, like I did with the sub, I'll be set.
I know that there are way better ways to set up a system out there, but mine's on a pretty reasonable budget, and aside from the Blau. head unit and the removable sub, it looks pretty much stock, and sounds good.
Good luck with your setup.

Blown Beast

I have Boston Pro 6.3 speakers in the back and placed the x-overs under the seats with velcro on the bottoms. This keeps them from sliding around and the seats still move back and forth w/o hitting them.

worf928

I declare that question to be not highjacking

I spent several hours last night digging around the MB Quart website and referencing:

http://www.nichols.nu/speakers89.jpg

The conclusion I drew was that the 210 and 216 (either Q, P or R series) would work but that the 4" might be a tight fit. The site does not have the nifty cross-section pictures for anything other than the Q series and the manuals for the P and R series are difficult to interpret. But, I suspect that the 40mm depth is sufficient with a trim ring - supposedly supplied in the kit. Also, folks have used older ".03" series speakers and have not reported depth problems and those speakers have depths which are slightly larger than the current models.

Quote:

Can someone please post a list of MB Quart speaker models (current or earlier) that will fit properly (with or without easy modification) for the 10-speaker system in my 1989 s4?

328.03 CX
214.03 CX

are model numbers I've seen used. However, they are long out of production.

Quote:

Also - I've heard that some of the MB Quart speakers for sale on eBay are COUNTERFIT....learned this from the MB Quart factory website....anyone know about this? How does one tell the real from the fake?

And that leads to another question:

From what sources have MBQ speakers been procured?

Has anyone ordered from this outfit:

http://www.infinitecaraudio.com/

or, does anyone have experience (good) with another?

tuk_928

Dave C,
Thanks so much for the information....printed it out and will be researching further. Good luck and please keep adding what you learn and what you choose to do to via this thread.
Cheers,
Tim

worf928

Very cool Ed. I'll be studying those pics a lot!

worf928

What I've learned tonight is:

- the MB Quart website leaves much to be desired. Such as dimensions for speakers and crossovers for the R and P series. We'll see how responsive their tech support is...

- I will have to cut-off the harness wires to the 6.5" rear drivers as they are soldered-on to the crossover and speaker. This is disappointing. I really want to avoid destructive modifications. The tweeter and mid-range however, disconnected easily.

- Without exact dimensions of the crossovers placement for the rear is TBD. But, as was posted earlier, placing them in the plenum area behind the speakers looks like it may be a lost cause.

worf928

One more thing:

- it is really annoying that most of the carpet is glued to the floor.

worf928

Tim,

I've done some more thinking and investigating. After getting crossover dimensions from Ed and MBQuart I hit upon the idea of mounting the rear crossovers in place of the factory amp. Following that lead I made - out of cardboard - two props the exact size of the rear x-overs and used them to check fitment under the amp/flap-control cover. Alas, I need another inch under there.

However, given that I'm installing a 20GB Kenwood Music Keg system in the spare tire well, I've already crossed the mental bridge of not keeping a spare in the car. And, thus, space becomes available for x-overs.

So, the current plan of record is:

- mount the front crossovers in the door panels like Ed did.
- mount the right rear crossover in-place of the factory amp. I'll be able to use the existing wire run to the RR speakers.
- run wires to the spare tire well for the left-side rear crossover.
- mount the Keg and LR x-over in the spare tire well
- run wires to the LR speakers from the well
- fabricate a base for the well to mount the Keg and x-over
- fabricate multi-pin connectors to allow quick disconnect to access the battery

The Music Keg and Kenwood X879 head unit is on the way.
I'm investigating sources for MB Quarts. I'm looking at PCE 210s for the fronts and PCE 216s for the rear.

I have a request to take some pictures of the interior nakedness of the '91. I'll link those to this thread soon. I'll post before and after cleaning pictures. You wouldn't believe the smeg under the rear seats and in the cracks. With all the various panels out I'll have a good opportunity to thoroughly clean all the leather and vinyl surfaces - and reglue the parts that are coming undone. And, rather than re-glue the rear seats to the cup-shaped wells, I plan to use a few strips of velcro.