The SM93 is an economical omnidirectional miniature lavalier condenser microphone designed for use in speech applications. Despite its small size, the microphone element provides full, clear sound comparable to that of much larger microphones. Its frequency response is tailored to body-worn applications, with low-end rolloff and presence rise.
The SM93 is powered by phantom power supplied by broadcast, sound reinforcement or recording equipment, or an external phantom supply. The SM93 operates over an extremely wide voltage range of 11 to 52 Vdc, covering both DIN and IEC phantom power standards.
| Type | Condenser (electret bias) |
|---|---|
| Frequency Response | 80 to 20,000 Hz, 12 dB/octave rolloff below 100 Hz |
| Polar Pattern | Omnidirectional, uniform with frequency |
| Output Impedance | Rated at 150 Ω (90 Ω actual) Recommended minimum load impedance: 800 Ω |
| Output Level (1 Pascal = 94 dB SPL) | Open Circuit Voltage: –43 dBV/Pa (7.0 mV) |
| Output Clipping Level (at 1,000 Hz) | –18 dBV (0.13 V) minimum |
| Total Harmonic Distortion | Less than 1% at 120 dB |
| Maximum SPL | 120 dB |
| Dynamic Range | 98 dB |
| Output Noise (equivalent SPL) | 22 dB typical, A-weighted; 26 dB, weighted per DIN 45 405 |
| Hum Pickup (electromagnetic) | –4 dB equivalent SPL in a 1 mOe field (60 Hz) |
| Signal-to-Noise Ratio | 72 dB at 94 dB SPL (IEC 651) |
| Polarity | Positive voltage on pin 2 relative to pin 3 of preamplifier output cable connector |
| Recommended Operating Voltage | 11 to 52 Vdc phantom. Protected against reverse voltage application |
| Current Drain | 0.33 mA |
| Operating Temperatures | -18° to 57° C (0° to 135° F) |
| Storage Temperatures | -29° to 74° C (-20° to 65° F) |
| Cable | Black 1.27 m (4.17 ft), two-conductor, shielded, terminated by miniature connector type (TA4F) |
| Microphone | Black ABS thermoplastic case with stainless-steel-mesh grille |
| Preamplifier | Steel case with non-reflective black finish, black-chrome belt clip |
| Net Weight | Microphone: 16 g (0.57 oz) Preamplifier: 118 g (4.17 oz) |
Usually arrives in 5-9 business days.
