Labworks PA-138 Linear Power Amplifier

Labworks PA-138 Linear Power Amplifier. Unit tested O.K. with hi power speaker and function generator. No manual or other accessories. As shown.

From Labworks Inc. :

The Labworks PA-138 Linear Power Amplifier is a high quality, air-cooled, direct-coupled audio amplifier primarily intended for use with small vibration systems. Although this amplifier has been designed to directly drive low impedance loads, it can be used in any application requiring continuous duty, high quality, audio power. A front panel switch allows configuring the output circuitry as either a low impedance voltage source or high impedance current source. A voltage-proportional-to-output-current output signal is provided for modal test and other applications requiring force monitoring.

PA-138 Amplifiers feature protection from both over current and over temperature ensuring long term reliability. The amplifier has full interlock capabilities as well as peak voltage and RMS current bar graphs to monitor output.

General Specifications Output voltage 25 V rms Output current 20 A rms Max. cont. dissipation 450 W Frequency response   Voltage source: DC – 10 KHz -.6 dB   Current source: DC – 2 KHz -2 dB @ 4 ohms Max. current gain 22 A/V Max. voltage gain 34 dB Cooling: 2-speed fans, automatic Input impedance 10 k-ohms Meters   Volts, pk 19 segment bar graph, 5%   Amps, rms/pk 19 segment bar graph, 5% Interlock circuit   External, user Ext. switch or TTL Input Power 1,000 VA max.   Voltage 100, 120, 220, 240 V, single phase   Frequency 48 to 62 Hz Dimensions 3.5″H x 19″W x 13″D Weight 24 lbs (10.9 Kg)