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> Ge dukane audio power amplifier 125 watts 1B3125
Ge dukane audio power amplifier 125 watts 1B3125
GE Dukane Audio Power Amplifier 125 Watts P/N 1B3125 Rack Mounted
The 1B3125 Power Amplifier is rated at 125 Watts continuous (RMS) power and it contains circuitry for 24 Vdc backup. The Amplifier mounts in a standard 19" (483mm) rack. Output Voltage may be 25 or 70 VRMS. Supply voltage is 120/240 V, 50/60 Hz, or optionally 24-28 Vdc. The Amplifier contains electronic protection safeguards against overloads or shorted output. A thermal overload protection circuit is also included that opens the primary power circuit if the unit overheats. Both protection circuits are self-restoring. The system may incorporate a Standby Amplifier as a backup against any unit failure.
The Audio Power Amplifier P/N 1B3125 Features
24 VDC BATTERY BACKUP connection
UL LISTED UNDER STANDARDS 1711, 1480
The 1B3125 Power Amplifier is used in Banked Amplifier Systems. The system supports up to six audio channels.
The Power Amplifier is a GE Security 1B3125, and it is capable of delivering 125 Watts continuous (RMS) power with less than 0.5% harmonic distortion in the 45 Hz to 20
kHz bandwidth (measurements are made at the 70.7V tap). The frequency response is 20 Hz to 20 kHz (+0, -1 dB) per EIA Standard SE-101A. The signal-to-noise ratio is greater than -90
dB below rated output for the 20 Hz to 20 kHz bandwidth. Input sensitivity is 1 VRMS at 1 kHz for rated output, and input impedance is 75 k Ohms. The output load (voltage) is 40 Ohms
(70.7 V), 5 Ohms (25 V), and 8 Ohms (31.6 V), and there is a 25 Volt center tap. Output regulation is better than 1 dB (zero load to full load). A rear-mounted input level control is provided.
The Amplifier has an electronic protection circuit as a safeguard against damage caused by overloads or shorted output. A thermal overload protection circuit is provided on the heatsink to open the primary power circuit and illuminate a thermal overload LED whenever
the amplifier overheats. Both protective circuits are self-restoring. The normal power source is 120/240 V 50/60 Hz, and the system draw 3.0 Amps at 120 Vdc power required is 11.5 Amps at rated output. Terminations are screw terminal strips with barriers on the output. The Power Amplifier is 5-1/4 in (133mm) high, 19 in (483mm) wide, 6-5/8 in (168mm) deep, and be finished in charcoal baked enamel. Net weight is 22.5 lbs (10.1 kg). The Amplifier is acceptable for Fire Protective Signaling Systems, approved and tested under UL Standards 1711, 1480, and 813. The amplifier is listed by ULC.
