Bozak (mordern) speaker recreation.

[Lord_Meow]

Hi All,

So I've seen a set of speakers that I like the design the buy a brand called Bozark, and have attached a few pictures they're very mid-century in design, now I was looking at recreating set speaker design I I fabricating the box is myself!

But the thing I'm stuck on is do I go 2-way or 3-way in driver design?

I'd be looking at going for all cone drivers, but not sure if there's any benefit to having the tweet, mid and woofer or just mid and full range woofer insted?
P.s. drivers I've not looked at yet either but would be looking at something by volt, Scanspeak or Vifa

Internal crossover too.

What do you folks think?

Tia,
David

6

• Lord_Meow
• Nov 17, 2021

1

• Lord_Meow
• Nov 17, 2021

LLERY]

 

[swechsler]

I think you're talking about Bozak, one of the pioneers in the home speaker market. I wouldn't choose the number of drivers based on random factors. I'd start with a woofer I liked that would work in the cabinet (I highly recommend modeling the woofer to determine the cabinet size and type using software like WinISD), and then determine what mid and tweeter would go with that. Very generally speaking, if you go with a 10" or larger woofer, you'll need a midrange, but there are exceptions, depending on what type of tweeter you choose. For example, the highly sought after Altec model 19 speaker paired a 15" woofer with a compression horn tweeter. On the other hand, the Infinity Kappa 9 had 12" woofers and was a 5-way design.

 

[hjames]

the tag on the back of the right cabinet does appear to be the Bozak label,
like this other one I found ...
There are a lot of fans of Bozak on Audiokarma!

 

[gadget73]

Bozark would be a good white van knock-off name though

Are those 302's ?

 

[Lord_Meow]

Bozark would be a good white van knock-off name though

Are those 302's ?

Not a clue to be honest I was scrolling through vintage speakers on eBay and I do have a thing for the mid-century style very similar to that I have a few pieces of mid century furniture currently in my flat so I was looking for something to match the aesthetic but for the price of what they're after on eBay I can't justify it where I could realistically justify half the cost to build my own I'll build them over time

 

[Retrovert]

So I've seen a set of speakers that I like the design the buy a brand called Bozark, and have attached a few pictures they're very mid-century in design, now I was looking at recreating set speaker design I I fabricating the box is myself!

If you simply desire the mid-century appearance, that's one issue.

If you want an actual Bozak, well, that's a whole can of worms. Bozak uses infinite baffle design, which requires an internal lining of cotton and a hanging curtain. You will likely spend as much recreating the cabinet and curtain as you would buying a pair on Craigslist.

But the thing I'm stuck on is do I go 2-way or 3-way in driver design? ... P.s. drivers I've not looked at yet either but would be looking at something by volt, Scanspeak or Vifa

Ummm, putting random drives together in a box rarely succeeds.

This path is quite difficult and not recommended for the hobbyist without experience. You would have better results using one of the already worked-out designs posted here on AK or diyAudio.com, with ample discussion and build support. Also look at the Parts Express forums for experiences posted by homebrew builders. The complexity should become apparent.

Here's what I previously wrote about books which may help newcomers to speakers to understand how drivers and crossovers are combined to form loudspeakers.

An excellent guide is Loudspeaker Design Cookbook (7th ed.) by Vance Dickason (2005).

If you want to delve deeper, then the Ray Alden books will be useful.

Advanced Speaker Designs for the Hobbyist & Technician by Ray Alden (1995)
Speaker Building 201 by J. B. Hall and Ray Alden (2017)​

These books are inexpensive and worth the money.

My inclusion or exclusion of other authors is not intended to disparage them or their work; I, in fact, own many of their books in addition to the above. The issue is the content tends to fall into either general surveys (say, such as How to Build Speaker Enclosures by Badmaieff & Davis, who clearly had an axe to grind, or H. A. Hartley's work which is a general treatment of the field, with an emphasis on his own work) which lack the details of the above books, or the more advanced (such as Testing Loudspeakers by Joseph D'Appolito) which assumes too much basic knowledge for most HiFi speaker aficionados and won't cover the basics.