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RE: Paper Cone Bozak Tweeters are Buzz Saws Too...

Posted by Steve O (A) on June 23, 2007 at 14:02:25

In Reply to: Bozaks posted by Tom Brennan on June 22, 2007 at 06:53:40:

...The older paper cone Bozak tweeters also use(d) some kind of foam ring bonded to the back of the cone as a damper. Unfortunately, over the years, whatever this foam is becomes brittle, looses its bond with the cone and either becomes gritty dust that binds in the VC gap or stays in tact but rattles and buzzes against the cone at numerous frequencies. How do I know?... I was being driven crazy by HF harshness in a Bozak speaker that uses that 12" LF driver with two of those tweeters splayed across the front (forget model #). I disassembled the tweeter and the dust fell out. I used a small amt of acoustistuff carefully placed in the tweeter housing to provide the damping effect of the original foam. This totally removed the harshness but it was a PIA to do. When I get the ambition, Im'm going to fix the other one.

A similar situation exists with the metal cone midrange except the foam is locked away under the dustcap. How do I know?...

I documented the tweeter renewal rather extensively. Maybe I should post some pics and narrative.

For me, the bottom line is that vintage Bozak just isn't worth the effort considering the materials they used were not very durable and the sound even when operating properly is mushy.

My dilemma is what to do with the Bozak tweeters. Although they (will) operate better than unmodified, they're no longer stock and so probably worthless to the typical Bozak afficianado. Probably chalk it up to experience, sell the woofers and trash the tweeters.

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