NOTE: Actual working range depends on RF signal absorption, reflection and interference
Audio Frequency Response
40 – 18,000 Hz,(+1 dB, –3 dB).
NOTE: Overall system frequency response depends on the microphone element
Gain Adjustment Range
UR2: –10 to +20 dB
Modulation
FM (45 kHz max. deviation), compander system with pre- and de-emphasis
RF Power Output
See table above.
Dynamic Range
>105 dB, A-weighted
Signal Polarity
Positive pressure on microphone diaphragm (or positive voltage applied to tip of WA302 phone plug) produces positive voltage on XLR output pin 2 with respect to XLR pin 3 and on the tip of the 1/4-inch output jack.
System Distortion (ref. ± 45 kHz deviation, 1 kHz modulation)
<0.3% Total Harmonic Distortion typical
Power Requirements
UR2: Two 1.5V AA batteries
Current Drain
UR2: 180 mA max. (normal RF power setting)
240 mA max. (high RF power setting)
Battery Life (Typical)
UR2: 9.5 hours (low power)
6 hours (high power)
Operating Temperature Range
–18° to +57° C (0° to +135° F)
NOTE: Battery characteristics may limit this range
NOTE: Electrical safety approval is based on a maximum ambient temperature of 35°C (95°F).
Overall Dimensions
UR2/BETA 87A: 254 mm L x 51 mm Dia. (10 x 2 in.)
Net Weight
UR2/BETA 87A: 325 g (11.5 oz.) without battery
Housing:
UR2: Aluminum die-cast handle and aluminum machined battery cup
Reduces unwanted breath and wind noise. For use with Shure microphones such as the Beta 87A, Beta 87C, SM87A, and SM86 microphones. Available in black.