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High-Performance Microphone Input Transformers for Professional Audio

Microphone input 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 input 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.  

CineMag laminations are specially formulated for us following proprietary procedures and recipes.  This assures the most linear magnetization curves throughout the operating range with the lowest harmonic distortion.   

The online lists are incomplete.  A more extensive list can be seen by clicking on the button below.  (There are more, but not listed.) 

Engineered Mic Input Transformers for Recording Studios, Broadcast & Custom Audio Designs

Part NoTurns RatioImpedance RatioOperating LevelNotes
CMMI-2C1:2150:600+8dBu @20HzLead wires or PC Pins.
CMMI-3.5C1CT:3.537.5/150:1850+9dBu @20HzLead wires or PC Pins. Center tapped.
CMMI-3.5APC1:3/537.5/150:1850+0dBu @20HzLead wires or PC Pins.
CMMI-5C1CT:537.5/150:3.75K+10dBu @20HzLead wires or PC Pins. Center tapped.
CMMI-8B3/PC1:8150:10K-1dBu @20HzLead wires or PC Pins.
CMMI-8APC1:8150:10KJE-110K-HPC -2dBu @20Hz
CMMI-10APC1:10150:15K-2dBu @20HzPC Pins only. Wide bandwidth.
CMMI-10B/PC1:10150:15K-1dBu @20HzLead wires or PC Pins.
CMMI-10C1CT:10150/600:15K+5dBu @20HzLead wires or PC Pins.
CM-25111+1:10150/600:50KB11178D
CM-281211CT:4 + 1CT:437.5/150/600:2.5K+2.5KLangevin AM-16 input transformerlead wires or printed circuit pins
CM-75101A1:10150:15KCM-75101AT has tapped primary windings.Lead wires or PC Pins.
CM-9994A1+1:24150/600:85K+3dBu/150Ω >+24dBU/600Ω @20HzLead wires only.
CM-9955-T50,200,300,600,1200,2400:9.1KHum-bucking Lead wires only.
CMQEE-3440A1:9/18/3637.5/150/600:50KPC pin version 2 ratios availableLead wires or PC Pins.
CM-240961+1:5150/600:3.75K +12dBu/+16dBuLead sires or PC Pins.