RTI Technologies Model 1200, 1200A microphones

RTI Tech
MODEL 1200, 1200A PERFORMANCE SPECIFICATION

Subminiature microphones for use in professional audio sound measurement, audiometric test and speech training equipment, hearing aids and other professional audio applications. A novel electret element and integral preamplifier are included. The frequency response extends from 20Hz to 20kHz with slight peaking above 10kHz. Model 1200A can be used for high sound levels to 145dB without significant distortion using the bipolar bias connection. Internal RFI filter capacitors can be supplied as option "C".

DIMENSIONS IN MM (INCHES)

Model 1200
Noise level («A»-weighted) (1 kHz equivalent SPL)	25 dB Max
Supply voltage	1.3 V (1–20 V)
Distortion (1% THD)	118 dBSPL
Current drain at 1.3 V	30 µA at 1.3 V
Output impedance	3 kOhm (2–6 kOhm)
Electrical Connection	3 solder pads on end

Model 1200A
Bipolar bias connection with external resistor and independant ground as per the diagram below.
Supply Voltage	±12 V
Distortion (1% THD)	145 dBSPL
Current Drain	500 µA