| SPECIFICATIONS | WL93 MICROPHONE (with standard test circuit
shown in User Guide Figure 3) | SM93 MICROPHONE (with preamplifier) |
| Type | Condenser (electret bias) | Condenser (electret bias) |
| Frequency Response | 50 to 20,000 Hz | 80 to 20,000 Hz, 12 dB/octave rolloff below 100 Hz |
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| Polar Pattern | Omnidirectional, uniform with frequency | Omnidirectional, uniform with frequency |
| Output Impedance | 3000 ohms | Rated at 150 ohms (90 ohms actual)
Recommended minimum load impedance: 800 ohms
(May be used with loads as low as 150 ohms with reduced
clipping level) |
Output Level
(1 Pascal = 94 dB SPL) | Open Circuit Voltage: -38 dBV/Pa (13 mV) | Open Circuit Voltage: -43 dBV/Pa (7.0 mV) |
Output Clipping Level
(at 1,000 Hz) | 0.25 V at 120 dB | -18 dBV (0.13 V) minimum |
| Total Harmonic Distortion | Less than 1% at 120 dB | Less than 1% at 120 dB |
| Maximum SPL | 120 dB | 120 dB |
Dynamic Range (maximum SPL
to A-weighted noise level) | 102 dB | 98 dB |
| Output Noise (equivalent SPL) | 18 dB typical, A-weighted | 22 dB typical, A-weighted
26 dB, weighted per DIN 45 405 |
| Hum Pickup (electromagnetic) | N/A | -4 dB equivalent SPL in a 1 mOe field (60 Hz) |
| Signal-to-Noise Ratio | 76 dB at 94 dB SPL (IEC 651) | 72 dB at 94 dB SPL (IEC 651) |
| Polarity | Positive pressure on microphone diaphragm produces positive voltage on pins 3 and 4 with respect to pin 1 (ground)* | Positive pressure on microphone diaphragm produces positive voltage on pin 2 relative to pin 3 of preamplifier output cable connector |
Recommended Operating
Voltage | 2 to 10 V; 5 V nominal (pin 2 to pins 3 and 4) | 11 to 52 Vdc phantom. Protected against reverse voltage application |
| Current Drain | 40 microamps typical | 0.33 mA |
| Environmental Conditions | Operating Temperatures: -18 to 57 degrees C (0 to 135 degrees F)
Storage Temperatures: -29 to 74 degrees C (-20 to 165 degrees F) | Operating Temperatures: -18 to 57 degrees C (0 to 135 degrees F)
Storage Temperatures: -29 to 74 degrees C (-20 to 165 degrees F) |
| Cable | Black 1.27 m (4.17 ft), attached, two-conductor, shielded, terminated by miniature connector type TA4F (WL93T: Tan 1.27 m [4.17 ft]) | Black 1.27 m (4.17 ft), attached, two-conductor, shielded, terminated by miniature connector type (TA4F) |
| Case | | |
| Case | Microphone: Black ABS thermoplastic case with
stainless-steel-mesh grille | 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) | Microphone: 16 g (0.57 oz)
Preamplifier: 118 g (4.17 oz) |
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