Porsche Enthusiasts Club Forum

Morning all,

Can anybody advise on possible upgrades for the speakers in a 928. On inspection, it looks like there are 4 sets of speakers, but i'm not sure if the front two in the doors are either mids and tweets split or 2 seperate channels. Has anybody here upgraded their system to something more modern and if so, what was the outcome?

Advice appreciated.

also, just wondering, is there any particular method of getting hold of Paul Anderson? Messenger pigeon maybe?

RB

What year is your car? The audio system went through a few changes.

Doors are mid/tweets not separate channels, with crude crossover mounted in door.

If you have 8 sounds like you have 2 rear seat, then 2 in hatch which handle higher rear frequencies, and are almost useless.

Depth behind speakers limits choices. I have MB Quarts all round. I only installed rears as fronts done by PO. DSD216s fit the rear seat spaces but you have to use original covers and dremel them off old speakers.

Thanks Stratford Shark,

My car is an 85 and I've only had it a few days. I think there is a pair of speakers near the rear hatch, but they do look very small, so probably for high frequency. I'll check again in the light of day tomorrow.

I've just done this on mine. I have 10 speakers, 2 in each door and 3 on each side at the back. As already mentioned the door speakers are connected with a crossover and can just be wired to the front channels on your stereo. The impedance is about 6 ohms.
The problem is with the rear speakers. I don't have the original amplifier but it must have had seperate channels for the large rear speakers as there is no crossover....so you can connect the 3 speakers on each side to your rear speaker connection on the stereo in parallel (there are 2 leads on each side) but it results in a loading of about 3 ohms on the amplifier.
I thought about adding crossovers etc but in the end just connected it up, and the stereo works OK, but that is quite a high load on the amplifier.
The sound is alright but there is not a great deal of bass, considering the size of the woofers in the rear panels! I think it needs a crossover at least.
Another thing is that all the speaker leads terminate behind a panel next to the passenger seat....so if you are not using the original amplifier you have to make up a harness to take them to the rear of the stereo.

The rear seat speakers had a very crude crossover when original - there should be a capacitor attached to one terminal on original speaker and this determined which frequencies were fed to the upward pointing speakers at the back. The rears were all fed by the L/R rear channels so no separate channels.

Originals were paper-coned Blaupunkt speakers which were poor even in their day! The cones in particular degrade to point where speakers make handy collanders.

The rear seat speakers are attached to unique fit covers which fit the concave/convex panel shape there. You need to preserve the mounting ring by cutting out the old speakers. The cover can then screw back on to the mount posts, while you screw the new speakers into the panel.

You can't get proper basss in a 928 without a sub in the hatch, as there is virtually no air space behind the largest speakers.

At this point people always say "I prefer the soundtrack from the engine anyway" but as it's tired and over-used I shan't.

The sound is pretty good actually with the original speakers. Maybe I've got a good one!