In 1968 Bozak brought these electronic products into the Bozak factory and developed them further. The CMA-10-2 and 10-2DL mixer was designed at Bozak for sale to discotheques. Bozak didn’t cease production of DJ mixers until some years after the death of Rudy Bozak. Buzzy Beck (a former engineer) and Paul Hammarlund carried on the work for a. Bozak CMA 10-2DL The DJ Booth. The Bozak CMA 10-2DL. UREI resurrected it after Bozak stopped production and issued their. Manual of CMA-10-2DL http. The Bozak CMA mixers were very expensive: they used high-grade Allen-Bradley components, hand-selected transistors, and were of modular construction for ease of servicing and expansion. C/M Laboratories. The CMA-10-2 and 10-2DL mixer was designed at Bozak for sale to discotheques. Bozak didn't cease. Bozak Cma 10 2dl Manual Lawn Care.
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Upgraded New Bozak Cma 10-2dl Rotary Dj Mixer By Mr. Beck Approaching Urei 1620:
$2,200
This mixer was assembled using many new old stock parts, factory service parts, or obsolete original
material built and designed during the 1970s-1990s by the U.S.A. Bozak Company located in Connecticut.
Any part containing the Bozak name, logo, or part reference number including but not limited to main
circuit boards, plug in electronic cards, chassis, faceplates, etc is original material as designed by the
U.S.A. Bozak Company. Parts containing the HB or HBG identification logo or part reference number
are owned and used with permission from HBG Audio Specialists. New or obsolete universal parts
produced by manufactures such as Alps, Allen/Bradley, Amp, Aromat, Beyer Dynamic, Buckeye,
Centralab, Chicago Miniature, Frako, Motorola, RCA, etc are original as used in U.S.A. Bozak factory
products. Any universal replacement parts such as Transformers, Potentiometers, Transistors, Resistors,
Capacitors, Diodes, Switches, etc have been selected from
today’s highest quality parts manufactures. The buyer/user is completely responsible for the proper
installation and any damages that might occur or be created from same. The mixer is guaranteed to not
be DOA if no shipping damage is present. No other warranty is expressed or implied. In no way is this
mixer associated with the company now using the Bozak name and producing Bozak brand electronic products.
As the header states this is a 100% original U.S.A. Bozak brand mixer built with original U.S.A. Bozak
factory obsolete material and factory service parts. The chassis is a smudge proof factory only 110/230
volt DL unit that was designed originally in the early 1980s for export use. It is identical in every way to
its counterpart U.S.A. model with the exception of being able to operate on different line voltages. For
the first time, this mixer has a one of a kind upgrade never available before. Here is what Mr. Beck wrote….
'The main complaint that was heard over the years from so many service facilities and I even get today
is the fact that the potentiometer replacement on U.S.A. Bozak brand mixers is so cumbersome and time
consuming. This issue was addressed for several service repair centers years ago but was never added to
the production line of mixers. A small card accepted the RK40 potentiometer that was installed with pins
instead of the production style solder loops. This made it possible to replace 1 level control without tearing
the entire front panel apart and the addition would save time and costs for both the customer and the service
repair centers. Because most Alps replacement potentiometers are available with pins instead of solder loops
I have designed a card to accept both the black RK40 and blue RK27 level controls. This is the first mixer
other than a handful of prototypes and service repairs that ever received this option. If you need to replace a
level control at any point in time in this mixer you will not be required to cut, chop, or modify anything to install
either a black RK40 if still available or the now more commonly used blue RK27 Alps potentiometers. I
have added this for ease of replacement by technicians and less expense encountered by the customer.'
This mixer features all new
* Smudge proof service chassis with variable voltage option.
* Original U.S.A. Bozak internal electronics.
* Black RK40 Alps potentiometers with replacement boards.
* Alpha soft touch balance controls with resister upgrade.
* Bourns military bass and treble control potentiometers.
* Cue switch with factory wiring.
* Updated power supply card.
* All new rear panel jacks with riveted heavy duty plates.
* Factory knob set.
The mixer will come configured as the original 1976-1989 factory DL mixer that was offered with 2
phono, 2 auxiliaries, and 2 microphone input channels. It is upgradeable to 4 phono inputs with the
addition of the 3rd and 4th channel 919 phono preamp cards. These cards when added makes channel
Aux 1 and Aux 2 become selectable phono channels. The only modification to make either channel
become a phono input is a simple repositioning of the rear input wires as explained in the owners service
manual and of course the purchase of the required 919 phono preamp card. Phono channels 1 & 2 can
become Auxiliary channels by removing the preamp card and replacing it with a jumper or jumper card.
All of the front end cards as pictured are 100 % original Bozak inventory from the 1970s-1990s. All
cards are new and were recently tested or assembled by Mr. Beck carrying new factory or factory
replacement parts. The Line/Cue cards are original 1983-1989 HB225 mixer cards that run cooler and
quitter then the original counter parts. These cards are an upgrade to 28db and have the selectable option
to be increased to 30db if so desired. The phono cards have all new components that were hand selected
and matched for optimum cartridge acceptance. The power supply card has the upgraded Vishay brand
4000-8000 hour premium capacitors and heavy duty regulator. As mentioned earlier the mixer has an
original smudge proof service chassis with gold RCA input jacks, switchable loop in and out function,
factory face plate, and all new original manufacture knob set with custom shaft bushings, and variable
voltage option.
The input and output potentiometers are all Alps brand RK40 Black Beauties mounted on the newly
designed HB-1-AA replacement boards. All balance potentiometers are electronically centered and are
equipped with the service upgrade resistors for accurate channel panning. The tone control cards are all
new with Bourns military grade soft touch potentiometers. The main board is a 30 year old new original
and was equipped with two new original Beyer Dynamic microphone transformers. All internal hook ups
and connectors are original factory parts and use all Alpha brand wiring. The pilot lamp is the late style
1979 up production LED with silver retaining ring.
The Buyer Is Completely Responsible For The Proper Use And Installation Of The Unit Including Any
Problems That May Be Created Or Occur From Same. Any Damage From Shipment Will Be The
Responsibility Of The Buyer And Shall Be Taken Up With The Freight Carrier. The Amount Of Insurance
For Overseas Shipping Shall Be Decided Upon By The Buyer. The Unit Is Guaranteed Not To Be
Electronically DOA If No Physical Damage Is Present From Shipping. No Other Warranty Is Expressed
Or Implied.
In the last year or so there has been a problem
with international delivery guarantees. The mixer is shipped as soon as payment is made and cleared.
However the 3-5 day postal guaranty gets it to your country in the allotted time but it seems many overseas
shipments are being tied up in customs. We can only guaranty the mixers arrival to your country in the
amount of time stated when shipped. We have no control over custom inspections taking anywhere from 2
days to as much as 2 months waiting for clearance. Again we have no control over this part of the shipping
Bozak Cma 10 2dl Manual 2017
procedure, so please be aware of this and take this into consideration when offerding.
Guarantied to be as stated but for any reason, if you have a problem with the item,
please contact me so that we can work it out. Thank you in advance, for looking,
I appreciate it. The winner of this sale willpay $75.00 forshipping and handling
with UPS or FEDEX or the United States Post office, which ever is convenient at the
time of shipping and insurance is included. Hawaii and Puerto Rico, will have
additional shipping costs and will be shipped with the United States Post office.
International shipping and handling will be with the United States post office/FEDEX
and the cost will be $250.00 and will be Insured and valued for $2499.00 max (rules)and will take up to3-6
business days to get to your country and how long the package takes to be delivered to you will depend on customs.
Thank you for looking.
I, John, would like to take this opportunity to say that, Buzzy and I really appreciate
your business and return business and for trusting in me and trusting in Buzzy's work
and thank you for your positive response and referrals and most of all, thank you for
keeping the Original Bozak name
Upgraded New Bozak Cma 10-2dl Rotary Dj Mixer By Mr. Beck Approaching Urei 1620:
$2,200
Bozak Cma 10 2dl Manual Transmission
Portions of this article have been extracted from Wikipedia (a public interactive encyclopedic forum) with many facts, errors, and omissions corrected.
I begin this brief synopsis with feelings of gratitude and appreciation from the many friends and coworkers I was associated with at Bozak, Inc.
I worked for Rudy Bozak over a span of about 17 years – from 1963 to 1979. During that time, I joined, and rejoined, the company four times: First in 1963 when Rudy hired me as a college student freshly
systems as my own company, Audio Consultants, and again after another 18 months in 1979 after the company buyout, to consult for the “new” owners of Bozak, Inc. – Bob Betts
Loudspeakers
Fresh out of college in 1933, Rudy Bozak began working for Allen-Bradley, an electronics manufacturer based in Milwaukee, Wisconsin. Bozak would later employ Allen-Bradley components in his own
During World War II, Bozak worked with Lincoln Walsh at Dinion Coil Company in Caledonia, New York developing very high voltage power supplies for radar.
Bozak joined C. G. Conn in 1944 to help them develop an electronic organ. While in Elkhart, Indiana, he noticed that the human sense of hearing was unpredictable at best. Years later, Bozak recounted this
The general sales manager, who was a pianist and played organ, sat down and played the thing and said it was great, just what we were looking for. A week later he was invited back into the laboratory and sat
.'
In 1948 Bozak moved his family to North Tonawanda, New York to develop organ loudspeakers for Wurlitzer. While there, Bozak experimented at home in a loudspeaker laboratory he housed in his basement.
speaker system. Though these sold reasonably well, McIntosh did not develop the design further. This experience led him to form his own company, Bozak Loudspeakers, in Stamford, Connecticut.
Bozak met Emory Cook in the early 1950s; the two hit it off and began working in a shared warehouse basement facility in Stamford. Cook and Bozak thrilled the audio world in 1951 with Cook's ground-
By the mid-1950s, Bozak had expanded into new quarters at 587 Connecticut Avenue in South Norwalk, with an export office in Hicksville, New York.
The foundation of Bozak bass loudspeakers unique design was the exclusive Bozak cone. The woofer cone was molded from a slurry containing paper pulp, lamb's wool, and other ingredients in a secret
the cone was pressed to uniform thickness. The result was a cone with “variable density” – greatest at the center to very acoustically inert at the rim – which allowed for minimal transmission reflections and
strength from its curvilinear profile along the radius. The cone received a thin coating of latex on both sides, with through-holes for binding the sandwich, in order to dampen the surface reflections that otherwise
speaker system originally contained four B-199 12' woofers, one 8 Ohm B-209 6' midrange driver and eight tweeters. The B-310 and B-310A were the mono versions in which the tweeters were arranged as a
program in the Bozak labs. All Concert Grand models starting from the B-310A contained two 16 Ohm B-209 midrange drivers. The Concert Grand loudspeakers were designed to fill large spaces and were not
model line continued to be manufactured by Bozak until 1977. Henry Mancini and Benny Goodman, good friends of Rudy Bozak, owned Concert Grand speaker systems. Jack Webb put two pair (four B-410s) in
Acoustic suspension arrived in the loudspeaker marketplace in 1959, making it possible to get the apparent low bass from a small, bookshelf-sized enclosure. This somewhat affected the sales of 'big box'
obtained with the heavier, gimmicked, reinforced woofer cones necessary for acoustic suspension. Bozak began offering smaller speaker systems to answer consumer demand. Bookshelf speaker systems
factory.
In 1963, at 18 years of age, Bob Betts was hired as technician but was put in charge of the Acoustics Lab a few months later – under Rudy’s watchful eye. Betts became chief engineer in 1968. Bob traveled
division was employing about 60 people dedicated to manufacturing the columnar models which were proving a great success.
For the 1964 New York World's Fair, Bozak put forward a new loudspeaker design; this time in the Vatican Pavilion. Rudy and Bob worked tirelessly to develop an omni or hemispherical coverage ceiling-
40 KHz, and a vibration platform that Bozak employees called 'The Shaker' which was meant to test the G-force integrity of electronic assemblies.
The company name changed from 'The R.T. Bozak Manufacturing Co.' to 'Bozak, Inc' in the mid-late 1960s.
Electronics
Power Amplifiers, Mixers, Equalizers, and DJ mixers
Bozak is often remembered today for his advanced designs of DJ mixers which allowed the development of the concept of disc jockey mixing and 'discotheques', but with exceptional sales to churches, arenas,
CMA-10-2DL; a unit that was very quickly accepted as the standard of its day. The Bozak CMA mixers were very expensive: they used high-grade Allen-Bradley components, hand-selected transistors, and were
reinforcement; it was produced in small quantities. C/M Labs also designed and built amplifiers and other integrated electronics for Bozak and used Bozak speakers to test their gear.
Eventually, Bozak brought these electronic products into the Bozak brand and developed them further. The CMA-10-2DL mixer was designed at Bozak. Bozak set up its own electronics production line, with
The Bozak brand is now owned by Analog Developments Ltd.
Home Systems
In the mid-1970s, Bob Betts designed the face plates and chassis for a series of home entertainment stereo equipment. These were to be known as the “900-series” of electronics. The 919 preamp and 929
poweramp.
Saul Marantz joined Bozak as consultant in the mid 1970s. He helped with esthetic details of certain products, but mostly served as sales consultant and good-will emissary. When both Bozak and Marantz
his own home entertainment models, late in the 1960s.
One of the last major Bozak projects that Rudy Bozak himself was an integral part of involved a thorough redesign of the B-200Y tweeter which had been a staple of Bozak loudspeakers since its introduction in
basic curvilinear configuration was settled by Betts in 1974 and put into limited production, but full production didn't get underway until 1975/1976 where it saw extensive use in the “Monitor-C”, and several of the
response, with very low harmonic, phase, and inter-modulation distortion. The “LS” would later be corrupted by the new owners to the “Listener Series” of systems – some quite good, but some not worthy of the
would take a few months to transact with the company’s bank. Bozak didn't wait for the employee buy-out; but with a handshake promise to retain certain crucial employees, Rudy sold the rights to his
remained as chief engineer.
But things began to change, Quality was seen to go quickly downhill; the new owners appeared to longtime employees as being interested only in pulling money out of the operation. Betts and other company
times: Newington, Bristol and New Britain but management was unable to sustain the effort. Finally, the company's assets were put into truck trailers to await final disposition. The company tooling was sold
NOTES:
Rudolph Thomas Bozak
* Born: 1910, Uniontown, Pennsylvania
* Died: February 8, 1982
* Residence: Milwaukee, Wisconsin, Stamford, Connecticut, Caledonia, New York, Elkhart, Indiana, North Tonawanda, New York, Buffalo, New York, Darien, CT
* AKA: Rudy Bozak, R. T. Bozak
* Occupation: Engineer, designer, entrepreneur, owner
* Employers: Allen-Bradley, Cinaudagraph, Dinion Coil Company, C. G. Conn, Wurlitzer, The R. T. Bozak Mfg. Co., Bozak, Inc., N.E.A.R.
* Spouse: Lillian Gilleski
* Children: Lillian, Mary and Barbara
Rudolph Thomas Bozak (1910-1982) was an audio electronics and acoustics designer and engineer in the field of sound reproduction. His parents were Bohemian Czech immigrants; Rudy was born in
Recognitions
* In 1938, Bozak was elected to Associate Grade membership with the Institute of Radio Engineers.
* By 1963, Bozak was on the Board of Governors of the Audio Engineering Society for two years.
* He served in the same capacity again for two years starting in 1970.
* Bozak was awarded an AES Fellowship in 1965 for 'valuable contributions to the advancement in or dissemination of knowledge of audio engineering or in the promotion of its application in practice.'
* In 1970, Rudy T. Bozak won the AES John H. Potts Award (now the Gold Medal), their highest award for outstanding, sustained achievement in the field of audio engineering.
Patents
* Switch: electrical musical instruments. US patent 2567870. C.G.Conn Ltd., 1951.
* Metallic diaphragm: electrodynamic loudspeakerss. US patent 3093207. R.T.Bozak Mfg. Co., 1963.
* Compliant annulus: loudspeaker and related circuit. US patent 3436494. R.T.Bozak Mfg. Co., 1969.
* Edge-damped diaphragm: electrodynamic loudspeakers. US patent 3837425. Bozak, Inc.
Author's Timeline: (Robert (Bob) Betts)
7-63 to 8-65 Bozak, Acoustics Lab Tech, Draftsman/designer (driver components, wood cabinetry, acoustical development.
8-65 to 7-68 US Army, Army Air Defense, Signal Corps, Vietnam (4th ID)
7-68 to 5-75 Bozak, Products Engineering Manager
5-75 to 1-77 Bozak system design and sales (own consulting Business)
1-77 to 7-77 Bozak, Chief Engineer
7-77 to 1-79 Bozak system design and sales (own consulting Business)
1-79 to 5 79 Bozak, Chief Engineer
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