| 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 |
 |
| 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 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 microA
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 |
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) |
