Bozak's

[FlawedDogma]

Ok, I just picked up a pair of B-410 Classics and a pair of B-300 Centurys. They are both in really nice shape. As expected the cabinets show normal wear. Where can I find out more info about them? How do I date them? Is there a Bozak forum out there? What are they worth?
Thanks in advance for any info anyone can shed some light on!

 

[Billa]

You've got yourself a fun project there. The code 6911 means they were made in November of 1969. I'm sure others will share more about them.

 

[Dswankey]

B-410 Classics and a pair of B-300 Centurys. Where can I find out more info about them? How do I date them? Is there a Bozak forum out there?

In the upper right hand corner of this page there is a "Search" feature, type in "Bozak B-410" and you should be able to find some threads of interest.

 

[Drugolf]

Yeah, just search Bozak here in the Speakers section in thread titles only. Many threads working on various models and a few guys that are really good and knowledgeable.

 

[Retrovert]

I suggest reading the many, Many, MANY threads about improving Bozak crossovers using the Tobin modification and other modifications.

TL/DR: Downwards shifts woofer-midrange crossover point from 800 Hz to 400 Hz. Do not use the Tobin attenuator, I've explained why an L-pad is far better and worked out the entirety of the supporting mathematics for your reading pleasure. Also read about the flower-pot modification I proposed, as this prevents cross-modulation between woofer and midrange. I've also explained how to build a super-tweeter as a four-way and the requisite crossover modifications.

 

[gogofast]

Ok, I just picked up a pair of B-410 Classics and a pair of B-300 Centurys. They are both in really nice shape. As expected the cabinets show normal wear. Where can I find out more info about them? How do I date them? Is there a Bozak forum out there? What are they worth?
Thanks in advance for any info anyone can shed some light on!

Congrats and welcome to AK.
I would end my speaker search if I ever come across a pair of those Concert Grands (well at least temporarily...)
Bozak speakers have very distinct sound signature.

 

[Edroom]

There is a facebook group specifically for Bozak fans, Ken Seger is a particularly knowledgable guy over there...I have a pair of Concert Grands, they are keepers for sure!

 

[Retrovert]

I must, alas, disagree with the utility of the Facebook Bozak group and I steer everyone away from it whenever possible.

Facebook is a write-only medium which scrolls off the end of the world. So new members must ask the same questions and have the same answers cut-and-pasted in, which tends to not work. Aside from Biggles, and maybe Ken, most of the Bozak group is one- or two-liners of little technical content. Asking Ken and Biggles to repeatedly respond to the same questions, ad nauseum, is burdensome when a simple search on AK would yield all the information in far greater details.

AK truly is the superior solution, as the postings here are archived for posteriety, the organization is far better, the responses and discussions are more detailed and thought out (desktop keyboard typing instead of phones or tablets, less of a need to keypunch repetititve responses), posts are linkable (to include in other posts), and the search feature actually works.

Facebooko dēlenda est.