Repairing CBM-170 Butyl Rubber Surround

[Austinbirdman]

One of my beloved CBM 170s has a tear in the butyl rubber surround (photo attached).

Could anyone suggest how to repair or replace this? These are such awesome performers (presently used as near-field monitors for my PC), and I really want to fix this, even if it's mainly cosmetic.

1631

[diesel79]

I’d call Ascend and order a new woofer. Easy peasy.

[14er]

How old are they? Yeesh.

[Mag_Neato]

How old are they? Yeesh.

That's a good question, considering the woofer changed somewhere down the line. The original non-SE CBM-170's used an Aerogel woofer, but has since gone with a polygel type. Not sure if this matters but Ascend can tell you based on the serial number of the speakers.

[davef]

One of my beloved CBM 170s has a tear in the butyl rubber surround (photo attached).

Could anyone suggest how to repair or replace this? These are such awesome performers (presently used as near-field monitors for my PC), and I really want to fix this, even if it's mainly cosmetic.

Definitely not cosmetic -- a torn surround like that will completely throw off the compliance of the woofer. It will eventually fail with a burned or shorted voice coil...

You definitely need a new woofer, simply give us a call at the office :)

[Austinbirdman]

It's one of the originals, bought in 2004 or 2005.