QSC Audio HF-75 User Manual
Connections
The HF-75 has barrier strip screw terminals that accept up to #10 AWG stranded loudspeaker wire.
HF INPUT Terminals
Connect the amplifier’s output signal to the loudspeaker’s HF INPUT terminals. Observe proper polarity; amplifier + signal to loud-
speaker + HF INPUT, amplifier - signal to loudspeaker - HF INPUT. Use the largest wire size and shortest length for the application.
speaker + HF INPUT, amplifier - signal to loudspeaker - HF INPUT. Use the largest wire size and shortest length for the application.
NOTE! Do not apply full range signal to the HF-75! There is no crossover in the HF-75, only a compensation/
delay network. All required signal processing must be done upstream of the HF-75. Maintain proper loud-
speaker connection polarity throughout the entire system for maximum performance.
delay network. All required signal processing must be done upstream of the HF-75. Maintain proper loud-
speaker connection polarity throughout the entire system for maximum performance.
HF OUTPUT Terminals
The HF OUTPUT terminals are factory-connected to the compression driver. These terminals should ONLY be connected to the HF-
75’s compression driver.
75’s compression driver.
QSC DCM or other active crossover
HF-75 compression driver
Amplifier
Processed high frequency
program signal
program signal
HF-75 connec-
tion terminals
tion terminals
Note: The HF-75 connection
enclosure does not contain a
crossover network! Ensure
only high frequency signal is
applied to HF INPUT termi-
nals or compression driver
damage will occur.
enclosure does not contain a
crossover network! Ensure
only high frequency signal is
applied to HF INPUT termi-
nals or compression driver
damage will occur.