QSC Audio Speaker System HF 63X1 User Guide

SC-312X  
Cinema Loudspeaker System  
Features  
• Passive, 2-way, screen channel system  
• SC-312X provides 90° horizontal by +15° to -35° vertical coverage  
• Low distortion waveguide provides highly articulate dialogue  
• Shallow depth (20") facilitates installation  
Developed specifically for the unique requirements  
of professional motion picture playback, the SC-312X  
extends QSC’s commitment to the cinema market. As  
a member of the DCS Digital Cinema Speaker Series,  
the SC-312X is a passive, 2-way, screen channel  
loudspeaker system comprised of two main units—the  
HF-63X1 high frequency system and the LF-3115 low-  
frequency system.  
Specifications  
Nominal Coverage  
Frequency Range  
Impedance  
SC-312X  
90° horizontal x +15 to -35° vertical  
33 Hz – 16 kHz (-6 dB)  
8Ω  
Sensitivity 1 watt/1 meter,  
half space  
95 dB  
Maximum Input Power1  
The HF-63X1 high-frequency system features a 2.5"  
(63mm) titanium diaphragm compression driver  
mounted on a custom designed high frequency  
cinema horn with an adjustable pan and tilt bracket.  
The HF-63X1 includes a driver protection and  
equalization network. DC blocking capacitors protect  
against DC or low-frequency signals that would  
likely destroy an unprotected driver. Power limiter  
circuitry protects the driver from overpowering and  
a response correction filter smoothes the frequency  
response of the horn/driver combination. The driver  
and equalization network provides for more reliable  
operation, ensuring the show will go on.  
2 hours of 6 db crest factor  
pinknoise, 50 Hz – 20 kHz,  
AES method  
150 W RMS  
Recommended Amplifier Power 300 W RMS maximum  
Recommended Processing  
Connectors  
Subsonic filter below 30 Hz, > 18 dB per octave  
LF-3115  
HF-63X1  
Barrier strip screw terminals  
accept up to #10 AWG  
stranded wire  
Barrier strip screw terminals  
accept up to #10 AWG  
stranded wire  
Transducers  
One 15" (381mm) high efficiency,  
extended bass woofer featuring a  
3" copper voice coil  
1.5" (38mm) exit, 2.5" titanium  
diaphragm compression driver  
Enclosure  
Quasi B4 alignment, ported  
Tilt/Pan Bracket  
10° vertical tilt  
10° horizontal pan  
The LF-3115 15" (381mm) low-frequency enclosure  
is designed specifically to address the extended low-  
frequency response required for cinema applications.  
The LF-3115 covers the frequency range from  
35 Hz to 1000 Hz, depending upon the high-  
frequency system requirements.  
enclosure with fully flared ports,  
symmetrical port design, tuned to  
36 Hz, constructed of MDF and  
heavily braced. Features vandal  
resistant woofer mounting bolts  
Dimensions (HWD)  
18.5" x 30" x 20.3"  
(470 mm x 762 mm x 516 mm)  
16" x 30" x 20"  
(406 mm x 762 mm x 508 mm)  
The SC-312X is designed for ease of installation.  
The HF-63X1 components come pre-assembled to  
reduce field assembly time. Three bolts are all that  
are required to secure the HF-63X1 to the top of the  
LF-3115 enclosure.  
Weight – Net  
System Weight  
Baffle Cut-Out  
83 lb (38 kg)  
123 lb (56.4 kg)  
35.5" x 32"  
40 lb (18.4 kg)  
1) Maximum input power tested in accordance with IEC 268-5 recommendations, 50 Hz – 20 kHz band limiting, 6 dB signal crest factor.  
 

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