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Performance Specifications
Analog inputs:
Each channel has
independent, switch selectable, balanced (XLR) and unbalanced (RCA) inputs
Input sensitivity (for full output):
1.7 V (8 ohms); 1.5 V (4 ohms)
Speaker outputs:
5-way binding posts
Minimum recommended load impedance:
4 ohms, which equals one 4 ohm load or two paralleled 8 ohm loads
Power output:
500 watts RMS per channel (x2); into 4 ohms; two channels driven
250 watts RMS per channel (x2); into 8 ohms; two channels driven
S/N ratio:
> 110 dB (A-weighted; 8 ohms)
> 105 dB (A-weighted; 4 ohms)
THD:
< 1% at rated power
< 0.05% from 1 watt to 350 watts / channel into 4 ohms
< 0.02% from 1 watt to 200 watts / channel into 8 ohms
Frequency response:
20 Hz to 20 kHz + / - 0.05 dB at 1 watt (- 0.6 dB at 50 kHz; -1.0 dB at 80 kHz)
Trigger and control:
Trigger Input: 5 - 20 V AC or DC
Trigger Output: 12 V DC 10 mA max
Protection:
The PA 2-250 is protected against excessive operating temperature, shorted
speaker connections, ground faults, and other common fault conditions. If a fault occurs,
the PA 2-250 will automatically power down and the front panel status LEDs will indicate the
faulty channel(s). The On/Off LED and the Channel Status LED for the channel with the fault will
flash red; the Channel Status LED for the channel without a fault will be off.
To reset the protection, press the On/Off button twice after the fault has been removed. The fault will
also clear if the mains power is cycled off. If the fault persists, please contact Sherbourn Technical
Support.
