AB International 280-A Brochure

Specifications

Model 280A

Type Two Channel Audio Power Amplifier
Power Output 75 Watts per channel into 8 ohms
100 Watts per channel into 8 ohms
180 Watts bridged mono into 8 ohms

Control/Indicators AC mains power switch, power on LED indicator.
Ground lift switch. Bridge/Stereo switch.
Each channel has individual level controls,
Signal/Clip indicators, and balanced/unbalanced
Inputs. Two front panel headphone jacks.

Turn-On Delay 3 second, solid-state activated
Damping Factor 250:1 at 1kHz
Freq. Response Plus/Minus 0.5db 20Hz to 20kHz
Distortion No more than 0.25%THD
Hum and Noise 101 db below rated output
Input Sensitivity 1.0Vrms for rated output
Input Impedance 15k ohms nominal, Balanced and Unbalanced

inputs
Output Connectors Dual 5-way binding posts
Power Input 100/240Vac 50/60 Hz, 300 watts
Wasted Heat (BTU/HR) 320 BTU/HR @ 75wpc rms 8 ohms both channels
(Calculated) driven @ 50% duty cycle
380 BTU/HR @ 100wpc rms 4 ohms both channels
driven @ 50% duty cycle
Dimensions 1 ¾” H, 19” W, 13” D
Weight 7.3kg