Speaker Asylum

Posted by Max (A) on January 16, 2008 at 21:19:00

In Reply to: RE: THE BOZAK GUY SPEAKS posted by Pat Tobin on January 09, 2008 at 21:06:26

I have a story...

Just a few weeks ago one of my best friends father gave me his Bazak Speakers. He told me he first bought the B-207a two way drivers and then later added the B-209b Mids. Then, had them put in a custom cabinet. The crossover is N-101a - He told us that this was all done right around 1964.

Two questions...

1. I want to start on building new cabinets right away. Should I keep the current measurements or enlarge them? (current inside cabinet measure = 24.5" x 9.5" x 16.5")

2. Does this crossover need the modifications you speak of?

Thank You

• RE: THE BOZAK GUY SPEAKS - Pat Tobin 18:49:56 01/17/08 (0)
  In Reply to: RE: THE BOZAK GUY SPEAKS posted by Max on January 16, 2008 at 21:19:00

  
  
  Max, Are the tweeters the early, paper-cone B-200X or the later aluminum-cone B-200Y? The X's have bright metal foil caps about 3/4" in dia. at the center of each cone. The Y cones are all black.
  
  < 1. I want to start on building new cabinets right away. Should I keep the current measurements or enlarge them? (current inside cabinet measure = 24.5" x 9.5" x 16.5")>
  
  Those custom cabinets are too small for the Bozak woofer. Bozak recommended at least 5 cu. ft internal volume for the cabinet (single 12" woofer models). It must also be very solid and tight, with no port of any kind. The Bozak woofer is designed to work in an 'infinite baffle,' or closed box. An 'active' enclosure, such as one with a ducted port, helps the low bass end, but degrades bass transient response. One of the things I like best about Bozak bass is the gutty growl of a well-recorded string bass. That's bass transient response, at which the Bozak woofers excel.
  
  <2. Does this crossover need the modifications you speak of?>
  
  Any system with the Y tweeters has the screwed-up Bozak xover and needs the modern rebuild/upgrade. If the now-rare X paper-coned tweeters are in use, the xovers are so old that the 'paper' capacitors used in the day are all bad by now.
  
  With best wishes,
  
  Pat Tobin
  
  
  
  
  

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