Sign in   |  Join   |  Help
Untitled Page

ARCHIVED FORUM -- March 2012 to February 2022
READ ONLY FORUM

This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022

 

Voice coil or capacitor or something worse? Woofer only works when cone is pressed

rated by 0 users
This post has 5 Replies | 1 Follower

-c
Not Ranked
Seattle
Posts 40
OFFLINE
Bronze Member
Reply
-c Posted: Fri, Apr 13 2018 2:51 AM
I have a pair of s45.2 and both have the same issue; the woofer only works when the cone is depressed, either by hand or by turning the woofer on its face. Iv’e checked the braided wires and connections and everything looks OK. The history of the speakers is they were stored for a number of years.

I can see this happening to one speaker but both? Strange coincidence?

Thanks

It's a fine line between collecting and hoarding, and I'm always dancing on it.  Beomaster 8000 x2, Beocord 8004, Beomaster 6000, Beocord 9000, CDX, Beomaster 6500, Beocord 6500, Beogram 6500 CD, Beogram 6500 Turntable, BeoSound 2300, BeoSound 2000,  BeoLab 8000, BeoLab 6000, BeoLab 2 Sub, BeoVox S45.2 x4, BeoVox S75, BeoVox S120, BeoVox M150,  BeoVox MS150, RL140, BeoTime, BeoCom 1

Craig
Top 50 Contributor
Yarm, United Kingdom
Posts 2,040
OFFLINE
Silver Member
Reply
Craig replied on Fri, Apr 13 2018 9:05 AM

I take it that the cones are moving freely and that the magnets have not shifted therefore gripping the voice coil tightly? and have you measured the resistance of the coils?

Craig

-c
Not Ranked
Seattle
Posts 40
OFFLINE
Bronze Member
Reply
-c replied on Fri, Apr 13 2018 2:43 PM

Yes to all three, and your comments inspired me to disconnect the speaker and test it out of the cabinet.  After disconnecting it from the crossover and pulling it from the cabinet, it's testing  fine with a 9v battery and I'm showing 4-6 ohms.  I ordered the cap kit from Martin and i hope  it does the job.

 

-c

It's a fine line between collecting and hoarding, and I'm always dancing on it.  Beomaster 8000 x2, Beocord 8004, Beomaster 6000, Beocord 9000, CDX, Beomaster 6500, Beocord 6500, Beogram 6500 CD, Beogram 6500 Turntable, BeoSound 2300, BeoSound 2000,  BeoLab 8000, BeoLab 6000, BeoLab 2 Sub, BeoVox S45.2 x4, BeoVox S75, BeoVox S120, BeoVox M150,  BeoVox MS150, RL140, BeoTime, BeoCom 1

-c
Not Ranked
Seattle
Posts 40
OFFLINE
Bronze Member
Reply
-c replied on Fri, Apr 13 2018 2:43 PM

Yes to all three, and your comments inspired me to disconnect the speaker and test it out of the cabinet.  After disconnecting it from the crossover and pulling it from the cabinet, it's testing  fine with a 9v battery and I'm showing 4-6 ohms.  I ordered the cap kit from Martin and i hope  it does the job.

 

-c

It's a fine line between collecting and hoarding, and I'm always dancing on it.  Beomaster 8000 x2, Beocord 8004, Beomaster 6000, Beocord 9000, CDX, Beomaster 6500, Beocord 6500, Beogram 6500 CD, Beogram 6500 Turntable, BeoSound 2300, BeoSound 2000,  BeoLab 8000, BeoLab 6000, BeoLab 2 Sub, BeoVox S45.2 x4, BeoVox S75, BeoVox S120, BeoVox M150,  BeoVox MS150, RL140, BeoTime, BeoCom 1

Craig
Top 50 Contributor
Yarm, United Kingdom
Posts 2,040
OFFLINE
Silver Member
Reply
Craig replied on Fri, Apr 13 2018 3:16 PM

Good man......post some pics and keep us informed

Craig

-c
Not Ranked
Seattle
Posts 40
OFFLINE
Bronze Member
Reply
-c replied on Fri, May 11 2018 8:08 PM

Quick follow up, after re-capping the problem still existed but at least I had eliminated that from the equation.  A a little more extensive testing revealed that it was the soldering point where the voice coil meets the tinsel.  I shaved a little of the black stuff covering the coil wires inside the cone and was able to test the voice coil separately from the tinsels.  The tinsel was worn, so I replaced the tinsel, re-soldered things back in place and covered with black dressing.  I now have a great sounding set of S45 speakers.

 

-c

It's a fine line between collecting and hoarding, and I'm always dancing on it.  Beomaster 8000 x2, Beocord 8004, Beomaster 6000, Beocord 9000, CDX, Beomaster 6500, Beocord 6500, Beogram 6500 CD, Beogram 6500 Turntable, BeoSound 2300, BeoSound 2000,  BeoLab 8000, BeoLab 6000, BeoLab 2 Sub, BeoVox S45.2 x4, BeoVox S75, BeoVox S120, BeoVox M150,  BeoVox MS150, RL140, BeoTime, BeoCom 1

Page 1 of 1 (6 items) | RSS
Need a cable? Just ask Steve at Sounds Heavenly
Sellong your B&O
Need a cable? Just ask Steve at Sounds Heavenly