HM-3 Omnidirectional Headworn Microphone for R300


Smooth and articulate acoustical performance
Comfortable double-ear headband
Adjustable boom can be mounted on either ear side
Boom-mounted gooseneck allows precise
microphone positioning

The HM3 is a high quality omnidirectional condenser
headworn microphone. Designed for use with the
R300-E wireless bodypack system, the HM3 allows
users the convenience of a hands-free presentation or
performance experience.
The HM3`s light weight adjustable headband fits
securely over both ears, while the boom with flexible
gooseneck end can be fitted to either the left or right
side ear hooks.
A generous 1 meter cable clips securely to the
headband, and terminates with a TA4F connector for
attachment to the R300 bodypack transmitter.

Technical specifications
Generating Element Condenser, back electret
Frequency Response: 50 -20,000 Hz
Polar Pattern Omnidirectional
Impedance: 200 ohms
Sensitivity, Open Circuit Voltage,
1 kHz:
10.0 mV/pascal
Cable length: 1 meter
Polarity Pin 1: Ground, Pin 2: Mic Input,
Pin 3: +5V bias, Pin 4: N/C
Connector: TA4F
Dimensions (without cable)
Length: 180 mm (7.086 in)
Width (widest): 105 mm (4.133 in)
(widest): 105 mm (4.133 in)
Width (narrowest): 15 mm (0.59 in)
Finish: Semi-Gloss Black
Net Weight: 28 g
Shipping Weight: 40 g
Accessories Furnished: Foam Windscreen
System overview
Architects` and Engineers` Specifications:
The microphone shall be a back electret condenser,
with omnidirectional polar response. The microphone
shall adapt to a light weight, double ear boom. The
boom shall mount to either side ear hook and contain
a flexible gooseneck. The microphone output cable
shall terminate with a TA4F connector wired for an