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Guest smcvey

Used to Work at Cizek

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Welcome Thriftyflea!

Would love any info on Cizek. I just bought some brochures and will scan them for the Library. Cizek made some great speakers but they seem to be much better known in Italy than here! Would like to hear from more Cizek fans/owners and especially former employees.

-Kent.

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Hi guys, I'm an enthusiast Cizek lover from Italy since i was teenager on 1984 with my first pair of Cizek Model III.
In the last couple of years i worked to find and to buy others in my opinion significant speakers of the Cizek production but it's quite hard to get the items in good and unaltered situation.
I will be really grateful to all the friends here and especially to the workers at the main Cizek factory for any help or suggestion in order to restore the factory's condition of these fabulous speakers.

In particular i have a quite urgent matter concerning my couple of MG27 sub mono bought 3 years ago
 
Unfortunately the first owner gave the 4 woofers to  a maintenance store and they changed the voice-coils and the spiders of these woofers without a serious reason. 
At this moment the new spiders are too hard and also i think that the new voice-coils are really different from the original. 
Even the resonant frequency in free air of each woofer at the moment is 16Hz instead of 12Hz as showed in Mg27's specs.

I will be really grateful if someone in touch with who worked at Cizek factory can help me to find the original Mg27's spiders and voice-coils.

In alternative i will really appreciate to receive just the full specs of the original voice-coils.

Thanks to a long work of investigation i found some pictures of Model's 1 woofer voice-coils and the original advertising of these speakers.
With these details i can imagine the following specs For the Model's 1  woofer aluminium voice-coils:
   
Diameter : 38mm
Copper wire size : AWG28
Number of Layer : 2
Number of turns per each layer : 61
Rcc : 3,2 Ohm

Now, looking at Mg27's circuit,and also at the Mg27's woofer magnet height (almost the double of Model 1's woofer magnet height) and at the 
declared specs of Mg27 i can just suppose the following specs about Mg27 voice-coil of each Mg27's woofer:
  
Diameter : 38mm
Copper wire size : AWG28
Number of Layer : 2
Number of turns per each layer : 122
Rcc : 6,3 Ohm

Even with this investigation and even if the calculated parameters are just hypothetical i still without some details concerning Mg27's woofer original voice-coils
as the material of the core (aluminium or paper??), the inductance in free air and the total lengths of the core, so i will be really really grateful to who 
will help me to get the originals voice-coils (and spiders) or in alternative to who will let me know these parameters in order to restore the original situation of these
woofers.

A secondary matter is the one regarding a special customized improvement done by Cizek factory on the famous Peerless tweeter before to be installed on the speakers.
This story still a mistery so i think that just a worker at the factory can help on that. 
But i can confirm that the customized tweeter by Cizek factory sounds much much better than the original Peerless stock one

Finally the last question regarding the not usual profile layout of the 8 inches original foam surround installed by the factory on the Model II and Model III woofers
in order to find the right or similar replacement.


Thanks to everyone for any help about that.

Sergio
sergiopxx@hotmail.com
Ph. +39 3288373006
ITALY

 

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Hi Sergio

I just emailed an MG27 brochure that has some specs.

ciao,

Kent

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Thank you so much Kent for your prompt reply.

Any additionals information from others Cizek lovers here?

Thank You in advance

Sergio

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On 18/4/2018 at 12:24 AM, Thriftyflea said:

So I know I am on a year old thread but I just found out a guy that lives back behind my warehouse used to work for Roy. His name is Lenny Plotkin and he wired the x-overs and worked on the woofers some of you undoubtedly know him. He spoke very highly of Sheldon and well Roy not so much. I just got two MG27 subwoofers from him unfortunately only two drivers between the two boxes but also 3 sets of model 1 Cizeks and a pile of peerless tweeters. I saw a few old photos of him working in the shop I will ask him if I can scan them and share with all of you if you are interested. Lenny is crazy as ever and still happily married to Phyllis.

Hi Thrift-flea, pls pls pls can you put me in touch with Mr. Plotkin in order to try to collect really precious technical infos for my restoring work of my old Cizek speakers at my home??

Thank You so much in advance

Best regards

Sergio
sergiopxx@hotmail.com

Ph. +393288373006

ITALY

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This is a great thread, I wonder why we don't have people who worked at AR and Advent

doing a similar thing.

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