B&W CDM2 - looking for replacement woofer alternative


I have a pair of B&W CDM-2 booksehlf speaker. One woofer might be beyond repair. ZZ09929 seem to be the part number but can't find (and might be cost prohibitive even if B&W would ever get them back in). 

I have zero details of the woofer. If someone has info, please post. 

Aside from keeping my eyes open for a cheap sinlge speaker or a totally busted (to part out) one: Is there a 'similar' woofer that I can swap in, at least at a temp fix? 

 

 

kraftwerkturbo

Showing 5 responses by kraftwerkturbo

It is understood that only the original woofer will net the original result. But if that is not a requirement, what other drivers would FIT and have similar characteristics.

There are THOUSANDS of example where (particularly for vintage speakers) where users have found replacements for drivers.

Trash vs. spending a few bucks and still use the speakers (in a lesser role as originally designed). I understand that this may not be the best place to extract such ideas from the audiance considering the amount of pixel dust that is floating around here. But there still may be some more practially inclinded people here who know the insides of their speakers.

Not considering repair, just replacement with something that a) (most important) FITS (phycially) and b) maybe someone close (for example another B&W driver from another speaker). 

erik: part out would be the alternative (selling the tweeters, the one good woofer, crossovers and housings). DIY forum already posted, great hands on guys there (a lot less pixeldust to deal with also :-)

 

I ordered the driver of a DM601, hope it physically fits. I also took the driver out, and found what is causing the issue. Previous owner (likely when putting expoxy on the small hole in the cone) must have dropped the driver. Magnet is askew to the basket, resulting in misaligned coil/gap. I will attempt to straighten the basket and magnet, nothing to loose. 

 

Just to close out the thread in this forum:

With nothing to loose, I first put 3 C clamps on (back of magnet/bottom of frame) and pushed the magnet back in (no gap). Took quite some force. Tested, still scratching (misaligned voice coil).

Then measured the distance front of frame to back of magnet (crooked/bent frame). Placed speaker on flat solid surface with frame down, and smacked the back of the magnet with mallet on piece of wood. With face of frame parellel to magnet now, tested again. Better, but still very noticeably scratching (I use low frequency test tone).

Pushing the cone in at spots going around, I found the spot where push the cone results in no scratching. Marked that point, and did one more smack with mallet/wood. Test, no quite a bit less scratching.

Repeated above stop: cone moves freely. Test: no scratching. Music test: working fine.

With a 'spare' (DM601 woofer ZZ10049; the original is ZZ9929 but not available for found) woofer on its way, i may put that in (if it fits without modifications) and see how that sounds (compared to original).

Also: put new sealant/foam on the mounting surface/flange (why are manufacturers using such super thin 'seal' on?).

Now onto tweeter fix of LCR60 S3 center channel.....