DIY Speaker Build Specs for D&M PSS drivers

[Jester Maroc]

I bought some used car speaker drivers for a small DIY speaker build. The problem is that I cannot find the driver specs on the internet, or from either PSS/BMW.

I sent PSS the following with an included photo of the driver (also included in this post):
Dear PSS,

I build speakers as a hobby and I recently purchased a set of BMW X6 drivers from a scrapyard. The speakers are:

I have searched all over the internet for the specifications on these drivers but cannot find any trustworthy information. I was hoping you would be able to provide me with the correct specifications on these drivers?


I need to know the following:
Resonant frequency of the driver


Qms
Qes
Vas

Thank you.

They replied and said I need to contact BMW as BMW would know the specification not PSS.

I forwarded the question and reply to BMW and they replied with:

I’m afraid we don’t have any information on our system and we can’t visually inspect your car, as the previous email you received we have to refer you to your preferred BMW Centre here and one of our technical staff can assist you further with your query.

I’m sorry if this is not the answer you were hoping for, but if you require any further information please get in touch.

I have contacted that BMW Centre in February and have still not gotten a reply.

Would anyone be able to advise what the specs are for that driver or where I might be able to find out what the specs are?

Thanks!
JM

 

[boju]

I can't find anything much on those either, tried looking through the X6 user manual for anything relating to the car's amplifier/speakers. nothing.

Did find them here: No specifications though. Could try contacting them.

https/www.getbmwparts.com/parts/2008/BMW/X6/index.cfm?action=partDetail&section=BODY%20HARDWARE&group=INSTRUMENT%20PANEL&subgroup=SOUND%20SYSTEM&component=Front%20dr%20speaker&partnumber=65139112472&vehicleid=204889&siteid=214672


Model # 65139112472 from the part in the link seems to be it from that car i think.

 

[Jester Maroc]

Thanks! I sent them a message, hopefully they will get back to me with some usable information.

 

[boju]

Hope so, good luck.

 

[Jester Maroc]

This is what I got from them:

Hello,

BMW doesn’t list the specs on this item. We can confirm the correct replacement part # for your vehicle if you provide the last 7 of the vin though.

 

[americanaudiophile]

I suspect you will have to measure them.
http/sound.whsites.net/tsp.htm
http/audiojudgement.com/measuring-thiele-small-parameters-part1/

 

[Jester Maroc]

I suspect you will have to measure them.
http/sound.whsites.net/tsp.htm
http/audiojudgement.com/measuring-thiele-small-parameters-part1/

Excellent! Thank you! I suspect that you are correct. I will have to try that. Will only be able to do this over the coming weekend though.

 

[Jester Maroc]

So, I replied to the guys at htps/www.getbmwparts.com and explained to them what I plan to do. They were very helpful and immediately sent an inquiry through to BMW. This is what I got from them today:

Heard back!!

“The resonant frequency of this speaker is 95Hz +/- 15%.”

Hope that helps!