Audio Transformers By Cinemag Inc.
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Custom Direct Box Inductors Line Input Mic Input Mic Output Output Phono Splitter Misc.   App Notes

 Microphone Input Transformers
  Microphone Transformers are necessary for good coupling of the microphone to the pre-amplifier stage. CineMag's experience goes back to the 1940s with Ed Reichenbach's pioneering designs for Altec-Lansing. The technology has made huge strides since then, but the reasons for employing CineMag's superior quality mic transformers remain the same: Excellent impedance matching between the microphone and the pre-amplifier, excellent balance and common mode rejection ratios (CMRR), very low distortion, and superior bandwidth.

   Part No.:

Impedance Ratio:

Operating Level:




150 : 600

+8 dBu

Mic transformer. p.c. and leads.

 CMMI-3.5C 150-1.84K +9.7 Mic transformer p.c. and leads. CMMI-3.5C.pdf  
 CMMI-3.5APC 150:1.8K  (1:3.5) -0.05dBu Microphone input transformer.  P.C. pin mounting. CMMI-3.5APC


150 : 3750

+10 dBu

Microphone transformer. p.c. and leads.



50, 200 : 9.8K

+7 dBu

Mic transformer, p.c. and leads.

CMMI-8C 150, 600 : 10K Multi-input impedance mic transfomer.  


150 : 10K

-1 dBu

Mic transformer. p.c. & leads.



150 : 10K

-2 dBu

Mic transformer. p.c. & leads.



150: 15K

-2 dBu

Microphone input transformer. P.C. pin mounting



150 : 15K

-1 dBu

Mic transformer. p.c. & leads.


 CMMI-10C 150 : 15K +5 dBu Mic transformer. p.c. & leads. CMMI-10C.pdf    

150/600:150K (1:5/10) 2.5dBu (strapped for 150 Ohms) Vintage mic input transformer. CM-2511.pdf    B11178B Hookup
U.R.E.I. Blueprint
 CM-28121     Langevin AM-16 input transformer CM-28121.pdf      


150,600 : 15K

-2 dBu

Vintage mic transformer. pcb & leads.

 CM-75101APC     Multiple input impedance.    
 CM-9944A 150/600:85K (1:23.8/47.6) +3dBu/150
input transformer.  Hum-bucking  (dual bobbin) construction.  High impedance ratio. CM-9944A.pdf      


50,200,300,600,1200,2400 : 9.1K


Multi-input impedance xfmr.

 CMQEE-3440A 37.5,150,600 : 50K -2 dBu Quad Eight vintage  
 CMQEE-3440APC 37.5, 150 : 50K   Mic/Line and Moving Coil phono pickup transformer.    
Microphone Input Transformers 

Audio Transformers Products from CInemag Inc. Los Angeles CA.

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