|  | WH30TQG | WH30XLR | 
| Type | Condenser,
electret bias | Condenser,
electret bias with integrated preamplifier | 
| Frequency
Response | 40 to
20,000 Hz | 
| Polar Pattern | Unidirectional (cardioid) | 
| Output Impedance (at 1kHz)
 | 2400
ohms | Rated 150 ohms
(actual) (Tolerates loads as low as 150 ohms with reduced clipping
level) | 
| Output Level (at 1 kHz; 0 dB = 1 V/Pascal)
 | -55.5 dB (1.7
mV) | -54.5 dB (1.9
mV) | 
| Signal to noise ratio (ref. A-weighted noise)
 | 63.0
dB at 94 dB SPL (IEC 651) | 
| Output Clipping Level (at 1000 Hz)
 | -22 dBV (0.08
V) | 2.5K ohm Load: -8
dBV (0.4V) 1 K ohm Load: -8 dBV (0.4V)
 | 
| Maximum SPL | 130
dB | 2.5K ohm Load:
142 dB 1 K ohm Load: 142 dB
 | 
| Dynamic Range (max. SPL to A-weighted noise level)
 | 99
dB | 111
dB | 
| Output Noise (equivalent SPL)
 | 31 dB
(typical, A-weighted) | 
| Recommended Operating Voltage
 | 5 VDC (pin 2 to
pins 3 and 4) | 11-52 VDC Phantom
power | 
| Polarity | Positive sound
pressure on diaphragm produces positive voltage on pins 3 and 4
relative to pin 1 (ground) on the mini TA4F
connector. | Positive sound
pressure on the diaphragm produces positive voltage on pin 2
relative to pin 3 of preamplifier output connector. | 
| Environmental
Conditions | Operating
Temperature: -7 to 49 degrees C (20 to 120 degrees F) Storage Temperature -29 to 74 degrees C (-20. to 165 degrees F)
 Humidity: 0 to 95 % (operating or storage)
 | 
| Cable | 1.5 m
(5 ft.) two-conductor, shielded | 
| Cable Connector | mini
TA4F | XLR | 
| Net Weight | Headset: 65 g
(2.3 oz) | Headset and cord:
60 g (2.1 oz) Preamplifier: 99 g (3.5 oz)
 |