Shure Microflex MX300 Series microphones are surface-mounted electret condenser microphones designed primarily for mounting on conference tables, stage floors, and lecterns. Their high sensitivity and wide frequency range make them especially suitable for picking up speech and vocals in sound reinforcement and recording applications. Interchangeable cartridges provide the installer with greater flexibility and make it possible to easily reconfigure microphone coverage as the need arises. The MX392 models include an internal pre amplifier.
MX300 Series microphones take advantage of the principle that, at a barrier or boundary, the sound pressure level doubles. When placed near a sufficiently large boundary surface, the microphone has 6 dB higher sensitivity and approximately 3 dB greater direct-to-reverberant sound ratio.
| Frequency Response | 50 to 17,000 Hz |
|---|---|
| Polar Pattern | Cardioid, Supercardioid, Omnidirectional |
| Output Impedance | EIA Rated at 150 ohms (180 ohms actual) |
| Environmental Requirements | Operating Temperature Range: -18 to 57 degrees C; Relative Humidity: 0 to 95% |
| Power Requirements | 11 to 52 Vdc phantom; 2.0 mA current consumption |
| Switch Attenuation | 50 dB minimum |
| Dynamic Range | 94.0 dB |
| Common Mode Rejection | 45 dB minimum, 10 Hz to 100 kHz |
| Polarity | Positive sound pressure on diaphragm produces positive voltage on pin2 relative to 3 of output conn. |
| Preamplifier Output Clipping Level | -6 dBV (0.5 V) |
| Switch Attenuation | 50 dB minimum |
| Cardioid | –27.5 dBV/Pa (42.2 mV) |
| Supercardioid | –26.5 dBV/Pa (47.3 mV) |
| Omnidirectional | –22.0 dBV/Pa (79.4 mV) |
| Maximum Sound Pressure Level (1 kHz at 1% Total Harmonic Distortion, 1 k ohm load) | 117.0 dB |
| Cardioid | 117.0 dB |
| Supercardioid | 116.0 dB |
| Omnidirectional | 111.5 dB |
| Signal to Noise Ratio (referenced at 94 dB SPL) | 71.0 dB |
| Cardioid | 71.0 dB |
| Supercardioid | 72.0 dB |
| Omnidirectional | 76.5 dB |
| Equivalent Output Noise (A-weighted) | 23.0 dB |
| Cardioid | 23.0 dB |
| Supercardioid | 22.0 dB |
| Omnidirectional | 17.5 dB |
| LED IN | Active low ( v 1.0v), TTL compatible. Absolute maximum voltage: -0.7 V to 50 V |
| SWITCH OUT | Active low ( v 0.5V), sinks up to 20mA, TTL com- patible. Absolute maximum voltage: -0.7V to 24V (up to 50 V through 3k Ω ) |
| Dimensions (H x W x L) | 4.26" (108.3 mm) x 3" (76.2 mm) x 0.83" (21.16 mm) |
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
