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Power amplifier management
Signal monitoring buses 1
(per CM16)
Number of Channels 4
Internal signal tap points
Pre-fader input signal 16
Post-fader input signal 16
Power amplifier output 16
Monitor input Mixed with tap point signal at
unity gain
Nominal level +4 dBu
Maximum level +21 dBu
Input impedance 10 kOhm balanced
Configuration Electronically balanced, shield
connected to chassis
Common-mode rejection Typical, >50 dB, 20 Hz - 20 kHz
Worst case, >40 dB, 20 Hz-20kHz
Power amplifier interface
Compatibility QSC Data Port equipped amplifiers
Connector and cable
HD-15 VGA cable, 2 meters length
qualified (for longer runs, contact
QSC’s Technical Services Department)
Amplifiers Up to eight 2-Ch. amplifiers or four 4-Ch.
amplifiers ( or some combination thereof)
Amplifier status monitor
Clip indicator Senses channel clipping
Protect indicator Senses amplifier protect status
Temperature meter Reports amplifier operating
temperature
Over-Temp. Alert Software adjustable threshold
AC power control
AC mode control Switches amplifier between
normal and standby mode
AC power indicator Indicates operate, standby, or
power-down mode
Control room foldback monitoring
Contact closure inputs and outputs
Output Sum of Monitor input and
signal from internal monitor
tap point
Frequency response 25 Hz–20 kHz ±0.5 dB
Distortion <0.05% THD @ +4 dBu out
Noise floor -90.5 dB
Nominal level +4 dBu
Maximum level +21 dBu
Output impedance 75 Ohms balanced
Output load 600 Ohms minimum
Configuration Active balanced
Level Adjusts amplitude of signal from
tap point
Monitor in to monitor out 0 dB, ±0.5 dB
Control range -95.5 to 0 dB in 0.5 dB steps
Inputs 1 discrete input
Configuration Single-ended input
Resistance for closure detect <1kOhm max
Resistance for open detect >5 kOhm min
Input Voltage Limit 7.000 VDC maximum
“-” input terminal connected to chassis
Output 1 discrete output
Configuration Electromechanical relay, dry
contacts, floating, C, NC, NO
Steady-state current (max.) 0.5 A
Switched current (max.) 0.25 A
Ground isolation 70 volts maximum
Connector “Phoenix-style” (a.k.a.“Euro-style”)
detachable terminal block connectors
Section 4: Specifications