From Josephson Engineering:
The C550 series is a “half inch” model available in two sensitivity steps, each one covering an operating range of about 100 dB. The C550H provides 10 mV/Pa output, suitable for microphone level inputs. The F version has lower sensitivity, for use in very high sound level measurements. Frequency response is flat for on-axis sound incidence. All models may be powered with standard 24 to 48 volt phantom supplies, and provide symmetrical active balanced output. They will also operate on phantom power as low as 15 V with some reduction in maximum level.
Specs
- Type
- Capacitive pressure transducer, prepolarized backplate
- Capsule
- 6mm condenser capsule, permanently polarized backplate, 3.5 µm polyester diaphragm metallized with nickel-chromium alloy
- Sensitivity
- 10.0 mV/Pa
- Dynamic range
- 35-135 dB SPL (per IEC 61672, with 48 V phantom power, 5 dB above noise floor, to 5% THD)
- Frequency response
- 20 Hz to 20,000 Hz, ±2 dB (individually calibrated at the factory)
- Output impedance
- 50 (recommended load 1k)
- Operating conditions
- Free-field
- Power
- Phantom power per IEC61938 P48, <5mA
- Temperature range
- -10 to +50 °C
- Weight
- 140 grams
- Connector
- 3 pin XLR type, pin 2 positive polarity
- Included
- Stand clamp, padded case
Source: Josephson Series Five (C550H / C550F) data sheet (PDF)