Measurement Microphone M 373
The M 373 1/4 ”electret measurement microphone is a sensor that can be connected directly to the signal inputs with 48 V phantom power that is common in audio measurement technology. Typical applications are room acoustic measurements or the calibration of public address systems.
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Request a QuoteContact usThe class 1 frequency response according to IEC 61672, the extremely high sensitivity of 25 mV / Pa in this category and the 7 mm standard diameter are considered special advantages and are comparable to conventional measurement microphones. The electret capsule and the preamplifier circuit form an inseparable unit. The electrical connection of the measurement microphone is made via an XLR connector.
The measurement microphone can be calibrated with the Pistonfon 5002 and common sound pressure calibrators using a 1/4 “adapter.
The MH 22 microphone holder and the W 3 windshield are recommended as optional accessories.
| Converter type | Electret pressure receiver | |
| Characteristic | Bullet | |
| Frequency range | 20 Hz to 20 kHz class 1 free field | |
| Idle transmission coefficient | 25 mV / Pa ± 2.5 dB | |
| Limit sound pressure level | for 1% harmonic distortion at 1 kHz | 132 dB (max.SPL, THD ≤ 1% at 1 kHz, RL = 1 kΩ) |
| Limit sound pressure level for 3% harmonic distortion at 1 kHz | 138 dB (max.SPL, THD ≤ 3% at 1 kHz, RL = 10 kΩ) | |
| Equivalent noise level DIN EN 60651 | 28 dB A (RL = 1 kOhm) | |
| Operating current | 7 mA | |
| No-load supply voltage | P 48V ± 4V | |
| Working temperature range | -20 ° C to +70 ° C | |
| Memory for microphone identification | 256 Bit 1 – Wire TM EEPROM (via IEEE 1451.4 TEDS editor) | |
| Connectors | 3-pin XLR plug, gold-plated contacts | |
| diameter | Ø 21 mm | |
| length | 130 mm | |
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