QSC Audio HF-75 User Manual
HF-75 Specifications
(subject to change without notice)
Frequency Range:
600 - 16k Hz (-6 dB, full space)
Nominal Coverage:
90° horizontal X +15° to -35° vertical (50° total, adjustable mount provides for vertical plane adjustments. The
horizontal plane can be adjusted by altering mounting position on the LF-4215 enclosure before tightening bolts.
horizontal plane can be adjusted by altering mounting position on the LF-4215 enclosure before tightening bolts.
DI:
9.0 dB (600 to 16,000 Hertz average)
Q:
8.0 (600 to 16,000 Hertz average)
Maximum Output:
133 dB SPL calculated peak, 1 meter, half space.
Impedance:
8 ohms nominal
8.0 ohms minimum at 3,000 Hertz
104 ohms maximum at 475 Hertz
8.0 ohms minimum at 3,000 Hertz
104 ohms maximum at 475 Hertz
Maximum Input Power:
60 watts rms (100 hours of 6 dB crest factor pink noise, 500 to 20,000 Hertz, IEC method)
80 watts rms (2 hours of 6 dB crest factor pink noise, 60 - 6,000 Hertz, AES method)
80 watts rms (2 hours of 6 dB crest factor pink noise, 60 - 6,000 Hertz, AES method)
Sensitivity:
108 dB half space, 1 watt, 1 meter
Crossover Frequency:
700 Hertz or higher, 24 dB per octave
Connectors:
Barrier strip screw terminals accept up to #10 AWG stranded wire. Four terminals: (two HF INPUT and two post
compensation HF OUTPUT). HF OUTPUT factory wired to compression driver.
compensation HF OUTPUT). HF OUTPUT factory wired to compression driver.
Transducers:
1.5” (38mm) exit, 3.0” (76mm) titanium diaphragm compression driver.
Mounting Hardware:
Attaches to top of low frequency cabinet using three 5/16”-18 x 3/4” long bolts.
Size:
30” wide X 16” high X 20” deep (762mm X 406mm X 508mm)
Weight:
50 lbs. (shipping), 40 lbs. (net), 22.7/18.4 kilograms
SPL and Impedance vs. Frequency
SP
L (d
B)
Frequency (Hertz)
Imp
eda
nce
(
O
hms)
Impedance
SPL