1/2" microphone preamplifier
TEDS, ISOTRON® (IEPE-type) | EM26CF Meggitt Sensing Systems - Measurement Group

The Endevco® ½-inch preamplifier model EM26CF is a general purpose preamplifier optimized for use with prepolarized condenser microphones. It is a small, robust unit and uses an Endevco Isotron® power supply, eg. model 4416B. It has low inherent noise level, a large dynamic range and a frequency response from 2.5 Hz to 100 kHz.

There are two flush-mounted switches for selecting various combinations of gain and filtering, 0 dB - for normal signals and +20 dB - for boosting weak microphone signals.

Filter switch settings:
A-weighting - as required in standard measurements.
Linear - to let the microphone signal pass unfiltered.
High-pass - to cut off unwanted low frequencies.

Its small ceramic thick-film substrate has a very high input impedance, and is shielded by a guard ring to minimize the influence of stray capacitance and microphonic interference. The model EM26CF can be used with all Endevco® prepolarized microphones. It has an integrated BNC output connector.The casing is made of stainless steel for maximum strength and durability.