Coles Electroacoustics Ltd

4104 CommentatorsRibbon Microphone Technical Specification

Features	Better than 30 dB average discrimination between voice and background noise. Provides speech of broadcast quality completely free from breath noises. Flat frequency response at the controlled talking distance.
4104 Noise Cancelling	Corrugated aluminium ribbon protected by fine woven nylon gauze
Ribbon	Low mass damped ribbon to control transient response
Polar Response	Bi-directional
Frequency Response	60 Hz to 12,000 Hz All microphones factory tested in free field conditions
Impedance	300 ohm
Sensitivity	-50 db W.R.T. IV/Pa
Equivalent Electro-magnetic hum pick up	Less than 0.0002 dynes/cm² equivalent acoustic input for 1 milligaus at 50 c/s
Distortion	Less than 1% at 120 dB SPL
Connection	By means of an XLR 3 pin plug - Pin 1 screen - Pin 2 positive - Pin 3 negative
Body Housing	Brass perforated case with stainless nose and mouth screens, pvc covered handle designed to provide a natural holding position for long periods
Dimensions	8" (200 mm) long x 2¼" (57 mm) wide x 3" (76 mm) deep.
Weight	10 oz (283 g).
Finish	Body brown enamel paint with pvc covered handle.
Packaging	Each microphone comes in a foam lined rigid plastic carrying case for safe keeping.
Accessories	Replacement washable plastic hygiene screen, packed in 10's Foam lined rigid plastic carrying case
Optional	Press to talk button