b&w dm-14 tweeter problem

Soran

Active Member

• Oct 2, 2005

• #1

I have a matched pair of b&w dm-14s with manual and in perfect condition, ok almost perfect because i have troubles with 1 of the tweeters. The coils are both perfect, but 1 tweeter is covered with resin and the other tweeter don't have the layer of resin anymore, it's still playing but very quiet. what can i do about this ? what kind of hars i need to use ? any thoughts ?

 

Soran

Active Member

• Oct 11, 2005

• #2

i was able to fix the tweeter. 3 layers of french polish on the membrame and the tweeter sound like new. now the b&w speakers are absolutly perfect

 

James Dio

Active Member

• Oct 11, 2005

• #3

Hey!!! I really like these kind of creative - Creative solutions...But,but,but what the heck is french polish? And what's more , how did you find out there was resin missing? Was all the shine gone from the DM-14 tweet ? Any before-aft pics ?

 

M

MarkAnderson

Addicted Member

• Oct 11, 2005

• #4

 

Soran

Active Member

• Oct 11, 2005

• #5

you only can see it in the light under the microscope that the spaces between the thin wires of the membrame are empty. so i filled them with very fine resin (polietour in dutch, kind of very fine & light resin for instruments) hard after a few minutes. i make sure every pore is filled and closed that no air can go trough, the result is amazing ...

i don't think its a creative solution, i think it's a professional solution, the one and only good method :thmbsp:

 

Last edited: Oct 11, 2005

James Dio

Active Member

• Oct 11, 2005

• #6

Very Nice Work, thank you for the info,Rotel 1603 fan !

 

Soran

Active Member

• Oct 11, 2005

• #7

Thanks but most of the honnor goes to my father, he's a lute builder and now much of wood & resin. we listened for a few hours to the b&w speakers. i believe these are the best speakers i ever heard in my life. my manual says minimum 15 watt amp, but what is the limit of the overload protection ? i can put the volumeknob of my rotel to -18DB without any overload. even my L150 speakers can't handle that much. i wonder how far they will go.