PMT Audio
Josephson Engineering C617SET

Josephson Engineering

C617SET

From Josephson Engineering:

The Josephson C617 is the second generation of our high voltage metal diaphragm omnidirectional microphone, suitable for the most critical sound recording and measurement applications. It operates from standard P48 phantom power yet provides full 200 volt polarize potential for a lab grade standard “half inch” microphone capsule. The C617SET is supplied with a Microtech Gefell MK221 capsule. The dynamic range is dependent on the inherent noise of the microphone capsule and the limits of P48 phantom power. The Josephson cascode FET front end circuitry introduced in the C606 is further refined in the C617, combined with our traditional balanced bipolar class-A symmetrical output stage.

For music recording, the Josephson balanced symmetrical circuitry together with a sub-micron thickness metal diaphragm capsule translate to the purest, most open sound possible. Pickup of sound pressure alone results in no proximity effect, very low sensitivity to wind noise, and phase accuracy that cannot be obtained with directional microphones. Spot-miking applications or overall stereo pickups using spaced pairs take on a new level of detail and precision not possible with other types. The small capsule size results in a nearly perfect omnidirectional pattern for accurate pickup of the whole acoustic environment.

Specs

Type
High voltage metal diaphragm omnidirectional microphone (200 V capsule polarization from P48)
Capsule
Microtech Gefell MK221
Pattern
Omnidirectional
Frequency response
10 Hz - 20 kHz ±1 dB
Sensitivity
66 mV/Pa (-24 dB ref 1V/Pa)
Output impedance
50 (minimum load impedance 1k)
Self-noise
14 dB SPL, A-weighted
Maximum output level
+7dBV for <1% THD, 1k load (127 dB SPL)
Power
P48 phantom per IEC 61938, <5 mA
Temperature range
-10 to +50°C
Dimensions
21mm dia, 176mm long (with capsule)
Weight
120g
C617 body alone, frequency response
10 Hz - 80 kHz ±1 dB
C617 body alone, equivalent noise level
<2.5µV A-weighted, <6.5µV CCIR quasi-peak
C617 body alone, gain
2.5 dB (balanced symmetrical direct coupled output)
C617 body alone, dimensions
21mm dia, 165mm long (with capsule)
C617 body alone, weight
110g

Source: Josephson C617SET data sheet (PDF)