Coles Electroacoustics Ltd

4115 Broadcasters Ribbon Microphone Technical Specification

Features	Up to 20 dB reduction of middle and low frequency interfering sounds Close talking without breath or pop noises Broadcast quality speech reproduction
4115 Noise Cancelling	Pressure gradient transducer ribbon microphone
Ribbon	Corrugated aluminium ribbon protected by fine woven nylon gauze
Polar Response	Bi-directional
Magnetic Fields	By use of hum neutralising wiring and magnetic shielding of the toroidal ribbon to line transformer 30 to 40 dB reduction is achieved in response to stray disturbing magnetic fields
Frequency Response	80 Hz to 8,000 Hz All microphones factory tested in free field conditions
Impedance	300 ohm
Sensitivity	-50 db W.R.T. IV/Pa
Distortion	Less than 1% at 120 dB SPL
Connecting Cable	2 Core and screen 30 ft. (9.1 metres)
Body Housing	Steel perforated case supported in aluminium frame with pvc covered handle designed to provide a natural holding position for long periods
Dimensions	8" (200 mm) long x 2" (50.8 mm) wide x 2½" (64mm) deep
Weight	10 oz (283 g). Without lead
Finish	Body satin chrome and brown enamel paint with brown pvc covered handle
Packaging	Each microphone comes in a foam lined rigid plastic carrying case for safe keeping
Accessories	Foam lined rigid plastic carrying case
Optional	Press to talk button