B&W P4 help needed

[Portugueezer]

Hi all,

Noob and first post here...
I have been searching high and low online to see if I could get some info, and this seemed the best place for it.
I have had a B&W P4 speakers since 96, and do to varios reasonsthey have not been used in the last few years.

I just fired them up again , but 1 tweeter seems to be gone...

I understand zero about htis stuff so please bear with me... Do you guys think there might be some problem with the connections\wiring, or probably have to get a new tweeter..?

Thank you and sorry for my English...🙂

 

[DonM]

Check out The Speaker Exchange at the following link:

Custom Replacement Tweeter for B&W ZZ03123, ZZ09989, ZZ9989, ZZ10227 - Speaker Exchange

Good luck!

 

[system7]

The service manual is here:
http://bwgroupsupport.com/manuals/bw-service

It's a 1.75mH bass coil, with third order tweeter filter, 1.5R and 7uF series, 0.15mH shunt and 10uF series.

You might try connecting a 1.5V battery to the bare tweeter to see if it crackles and shows life. If it does, you are looking for a circuit break somewhere else.

http://www.gramophone.co.uk/editorial/review-bw-model-p4-speaker

See if you can find a metal dome tweeter that physically fits and is similar, and adjust the 1.5R resistance to suit. It's not rocket science. 🙂

 

[meanman1964]

Hi all,

Noob and first post here...
I have been searching high and low online to see if I could get some info, and this seemed the best place for it.
I have had a B&W P4 speakers since 96, and do to varios reasonsthey have not been used in the last few years.

I just fired them up again , but 1 tweeter seems to be gone...

I understand zero about htis stuff so please bear with me... Do you guys think there might be some problem with the connections\wiring, or probably have to get a new tweeter..?

Thank you and sorry for my English...🙂

A very common problem with B&W tweeters is the ferrofluid .After several years this fluid becomes a sort of syruppy and the voice coil can't move anymore.

 

[Portugueezer]

A very common problem with B&W tweeters is the ferrofluid .After several years this fluid becomes a sort of syruppy and the voice coil can't move anymore.

Thanks for all the replies guys... Much apreciated!
Is this ferrofluid something easily substituted?

 

[meanman1964]

You need to disassamble the tweeter very carefully and wash out the air cap.
My brother has given a lot of B&W tweeters a second life this way and always make new ferrofluid himself.

 

[Portugueezer]

Cheers! 🙂