Power Supply Model 2221
From Microphones & Accessories
The Model 2221 provides the highly stable DC polarization voltage required by precision microphones along with low noise amplification enabling it to drive input and output cables as long as 500 feet. It is rugged, lightweight and will provide up to forty hours of continuous operation (with PRM902 Microphone Preamplifier) using six AA internal batteries. It can also provide sufficient current to power the PRM903 Microphone Preamplifier, which has an internal heater.
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Application
- Powering precision microphones and preamplifiers
- Signal conditioning and amplification for use with recorders, data loggers, and frequency analyzers
Features
- Internal battery power with low power consumption
- 0 and 200 volt polarization voltage
- Selectable Flat (Z), A, and C- weighting
- 0 to 50 dB gain
- Both instantaneous and latching overload indicators
- LED indicators for output signal, internal battery voltage, and
external power - Drives long cables (500 foot), input and output
- High preamplifier current capability to drive Larson Davis
PRM903 preamplifier with internal heater - Compatible with ICP powered transducers (using PRA951
adaptor) - Recalls last active setup upon power-up
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