Microtech Gefell M930 Cardioid Condenser Microphone
The M 930 and M 940 studio condenser microphones combine modern large diaphragm capsule technology with the latest in semiconductor circuit topology. They are specifically designed to meet the needs of professional and semi-professional users who demand the highest performance. The M 930 and M 940 are ideally suited for universal miking applications in broadcast and sound studios. Their very favorable pricing also makes them attractive for project studios. Applications include vocalists, announcers, dialog pickup and as a spot microphones for recording guitars, keyboard, percussion, wind and string instruments.
The pick-up pattern is perpendicular to the direction of the microphone axis ( side addressed ). The model number and pick-up pattern symbol mark the front of the microphone.
The M930 is a compact, Cardioid large diaphragm microphone that
combines the latest Gefell M9 gold evaprated capsule with an optically
isolated capsule amplifier for low self-noise, excellent dynamic
handling and the added benefit of greater placement ease.
first view, one is immediately amazed at how compact the M930 is. But
even more amazing is the incorporation of the M9, a full-size 1-inch
(25mm), 24-karat gold evaporated diaphragm. The M9 features a hand
stretched Mylar/PE substrate with a hand-drilled solid brass
back-plate. All Gefell capsules are individually sorted and matched for
The M9 is mounted on a triangulated pedestal
that deflects unwanted body reflections away from the diaphragm,
reducing phase cancellation and the effects of comb-filtering which can
mask harmonic details and limit the depth of field. To reduce noise
from vibration, the microphone capsule and electronics are elastically
suspended inside the compact metal housing. This reduces the
sensitivity to mechanical impact and structure born noise. This of
course is further advantaged by the M930's diminutive size, which has
the net result of less 'vortex' or acoustic disturbance around the mic.
creating a smaller body is not without challenges: As everyone knows,
smaller usually means bringing the circuit closer to the sensitive
element. If left unchecked this would result in an unacceptable noise
floor. The M930 overcomes this technical challenge by introducing
optical isolation between the 48-Volt phantom power supply and the
internal capsule amplifier circuit. Optical isolation removes 'hash'
caused by contamination and ripple from the power supply, providing a
pure DC supply to the element. The M930 benefits with improved voltage
stability and significantly lower self-noise.
Below the capsule,
an innovative circular PC board using the very latest semiconductor
technology houses the electronic impedance converter. A newly perfected
transformerless circuit topology reduces the noise floor to an
extremely low level and minimizes RFI susceptibility, while also
raising the maximum output capability. Furthermore, the use of large,
oversized capacitors provided added storage for exceptional transient
handling. As a result, the Gefell M930 produces a clean,
distortion-free sound over an extremely wide dynamic range.
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