[Inkedupfatboy]

I have a '94 cab...

with the hi-fi stereo option.

Stock head unit and speakers.

 

I have owned the car since 2013

 

The stereo works, but I only have sound out of the two main rear speakers, regardless what I do.

All fuses are intact, and setting on stereo have no effect.

 

Ididn't feel like addressing it until now as the prices have come down on the amps.

I purchased a new amp that hides under the passenger seat as that may be the issue.

However, the unit I received from Sunset after waiting a month for it from Porsche, Germany, doesn't reflect my memory of what the unit looked like.

 

Does anyone know if there were two different amps or were they all the same?

The part they sent me was 944. 645. 301. 00

 

I looked in my parts / service manual pdf's but can't find it and they are for a '95.

 

Just would like to be sure before I go tearing the seat out again..

 

Thanks.

Ed

 

 

 

 

 

 

 

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[Inkedupfatboy]

Thanks for the help folks. I guess I will figure it out on my own.

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[az968]

in my version of PET (which isn't the pdf but the PET system) the amp for a 94-95 is part number 944 645 301 00.

 

The amp for the 92-93 is part number 944 645 301 00

 

So it appears they are the same.

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[94SilverCab]

Sorry, the problem is that there were about 10 different stereo systems available, and they seemed to swap parts out ad-hoc.

 

Jay

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[Inkedupfatboy]

Okay i got that - it would have been nice to get even an "i don't know" rather than being ignored.

 

It turned out that the amp was the correct unit. The old amp was covered in a sticky ooze so I assume something blew or overheated.

The new amp went in fine after a clean up of the floor pan, however I still don't have sound coming out of any of the front speakers.

This means to me that either the previous owned disconnected something behind the door cards, or I have a bad head unit.

The driver's door card was off so I could have the leather/vinyl or whatever it is re-glued in 2013, and I think we looked there and found nothing.

I have also had the center console out in 2013 when I bought the car trying to figure it out then, and I remember all the connections were tight and the fuses were good, so again, my thought is bad head unit.

I guess I will see if I can find anther blaupunkt for it.

more money into the car.

 

Also for what it's worth, I was keeping a battery tender on it, and had the hood up for extended periods. It doesn't like that.

I had to order new hood struts because the originals won't hold the hood up anymore. Not expensive by Porsche standards, but more than a domestic strut.

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[EEZATOY]

I had the resistors in the doors go bad (no sound from the speakers or tweeters) - deleted the resistors and speakers worked fine....

I have since replaced the speakers and tweeters ...

 

Just something to check before going to a new head unit....

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[MCL968]

Sam is right, try the speakers with a known working unit first. The resistors are used to separate the frequencies for the different components. If they (or the choke coils) fail, the speakers will not work, even though the actual speakers are fine.

 

My cab was born with the basic stereo system, I have replaced the head unit and the rear speakers, but the door speakers still seem to work well. A nav unit with a power amp may be in my future, although I have lots of things further up on the priority list.

 

Matt

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[pdxmike]

https://www.youtube.com/watch?v=u9dv_Cd5SSA

 

Cheap, fast way to test at the harness connector. Rather than cut the harness you can use some appropriate gauge single-strand wire to probe the appropriate speaker wires directly on the harness connector. And, you can use a 9V battery instead of a tone generator to test the door speakers (if the circuit is good it will "pop" as you apply current).

 

Apologies if this is too obvious. Good luck!

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[Kim]

my recollection is that some stereos had two amps.  My 92 cab, which had only the 6 speaker set-up, had one amp under the driver's seat.  My 92 coupe, which had the 8 speaker set up, had two identical amps, one under each seat, and I think that one amp did the front speakers and one amp did the rears. Note that if the little cross-over system in the front door panel fails then you might get a failed tweeter or woofer on that side (or even a dead side) , but it ought not to impact the other side.  The back speakers did not have a separate cross over units - i think that they were a two-way speaker with a capacitor for the tweeter cone. 

 

I would unplug the rear speaker harness from the amp and plug the front speaker harness in.  If the front speakers work then you are missing an amp. You might also ensure that everything is properly plugged into the head unit.  Have you looked under the passenger seat?

 

The reality is that the head units and power amps in 1992-1995 were low power and of minimal quality. It might be easier to buy a new head unit and simply abandon the power amps. The speakers will plug directly into the new amp with perhaps a bit of cutting and splicing. Be sure to get the phasing correct. Even a modest new amp will likely be better that the original ones. There is a lot of discussion here on stereos.

 

Have fun.

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[94SilverCab]

 

The reality is that the head units and power amps in 1992-1995 were low power and of minimal quality. It might be easier to buy a new head unit and simply abandon the power amps.

 

That's what Darryl did for me...still have a buzz in the passenger door when I turn right, but at least I have rear speakers.

 

Jay

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[Ryan]

The factory stuff is junk compared to the aftermarket. Unless you are after originality at all cost, I would dump all the stuff that came in the car. 

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[craigbilodeau]

The factory stuff is junk compared to the aftermarket. Unless you are after originality at all cost, I would dump all the stuff that came in the car. 

 

Great segue. If you were to purchase aftermarket stuff, what would you buy? I guess it does not matter for the amps and speakers so much, but I would think that you would not want to put in a receiver unit that was so high-tech that it looked completely out of place with the car it resided in. I have such a problem. When I purchased my 968, it came with a Sony receiver, Sony amp (mounted in the trunk), amp/equalizer (also mounted in the trunk), Sony multi-disk changer (mounted in the passenger-side cubby), and a subwoofer (rendering the driver-side cubby inoperable). The issue is that the Sony receiver has a front face LED screen that is flashy and does not match the look and feel of the interior. Any suggestions?

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[MLB]

I love the general look of the Porsche Classic radio nav system that was introduced a couple years ago

 

https://www.porsche.com/usa/accessoriesa...ghts/navi/

 

Too bad its stupid expensive, I mean really out there, and that screen is so small as to be useless to anyone who doesnt have the eyes of Legolas.

 

I put in a new Blaupunkt a couple years back, and I like it, but its too shiny.

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[craigbilodeau]

I love the general look of the Porsche Classic radio nav system that was introduced a couple years ago

 

https://www.porsche.com/usa/accessoriesa...ghts/navi/

 

Too bad its stupid expensive, I mean really out there, and that screen is so small as to be useless to anyone who doesnt have the eyes of Legolas.

 

I put in a new Blaupunkt a couple years back, and I like it, but its too shiny.

 

$1300! Wow. Guess I'll I have to wait for Christmas on that one...

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[MLB]

I thought it was originally almost $2500!

But apparently not, also checked a few sites

$1300 is still cuckoo crazy

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