QSC Audio Portable Speaker SC 414 User Guide

NEW!  
Cinema Loudspeaker System  
SC-414  
Features  
• Four-way selectable, tri or quad- amplified screen channel system  
• Unique HF/VHF diaphragm has less mass than traditional diaphragms  
resulting in exceptional dynamic range, extended high frequency response  
and lower distortion  
• LF-4115 is constructed of MDF and is heavily braced  
• Low-distortion waveguides provide highly articulate dialogue  
• Shallow depth (20") facilitates installation  
• THX™ approved for professional cinema applications  
SC-414  
Developed specifically for the unique requirements  
of professional motion picture playback, the SC-414  
extends QSC’s commitment to the cinema market.  
As a member of the DCS Digital Cinema Speaker  
Series, the SC-414 is a four-way, selectable tri or  
quad-amplified screen channel loudspeaker system  
comprised of two main units — the MHV-1090 mid-  
high-very high-frequency system and the LF-4115  
low-frequency system.  
Specifications  
Nominal Coverage  
90° horizontal x +20 to -30° vertical  
33 - 20 kHz  
Frequency Range (-6 dB)  
Active Crossover Frequencies  
250, 1700 and 6000 Hz, 24 dB per octave  
LF-4115  
MH-1090  
MF: 8Ω HF: 8Ω VHF: 8Ω  
Impedance  
4Ω  
Sensitivity 1 watt/1 meter,  
half space  
93.5 dB  
Tri-amp  
Quad-amp  
The MHV-1090 mid-high-very high system features  
a high output, horn loaded 10" midrange cone  
driver and a coaxial neodymium high-frequency/very  
high-frequency compression driver. The MHV-1090  
includes a driver protection network and a passive  
crossover for tri-amp operation. The protection circuitry  
prevents low-frequency signals from damaging the  
high-frequency and very high-frequency driver. A  
high power 10" cone driver allows operation as low  
as 250 Hz and the advanced phase plug coupling  
permits a crossover point of up to 1800 Hz to the  
high-frequency horn. This ensures that most of the  
dialog range is reproduced by a single element for  
unmatched intelligibility.  
MF:105 dB  
HF/VHF: 110 dB  
MF: 105 dB  
HF: 110 dB  
VHF: 110 dB  
Maximum Input Power1  
8 hours of 6 db crest factor  
IEC 268 noise spectrum  
400 W RMS  
MF: 275 W RMS  
MF: 275 W RMS  
HF/VHF: 230 W RMS HF: 150 W RMS  
VHF: 80 W RMS  
2 hours of 6 db crest factor  
pink noise, 50 Hz - 20 kHz,  
AES method  
500 W RMS  
MF: 800 W RMS  
HF/VHF: 500 W RMS maximum  
Recommended  
Amplifier Power  
800 W RMS maximum  
MF: 800 W RMS  
HF: 500 W RMS  
VHF: 300 W RMS maximum  
The coaxial neodymium high-frequency/very high-  
frequency compression driver provides a dramatic  
improvement in dynamic response, clarity and  
transparency. The annular high-frequency diaphragm  
covers the frequency range between 1800 and  
7000 Hz with a smooth, linear response. The large  
diaphragm excursion of +/-0.8 mm results in high  
output and increased power handling. The very high-  
frequency driver covers the frequency range from  
7,000 to 22,000 Hz and eliminates the dome break  
up of conventional drivers that can cause resonance  
and harsh, metallic sound.  
Recommended Processing  
Subsonic filter below 30 Hz,  
>18 dB per octave  
4th order LR crossover at 250, 1700 and  
6000 Hz via QSC DCM or QSControl.net  
Connectors  
Transducers  
Barrier strip screw terminals accept up to #10 AWG stranded wire  
One 15" (381mm) high  
efficiency, extended bass  
woofer featuring a 4" copper  
voice coil  
MF: 10" high-effeciency, horn-loaded  
cone with pahse plug  
HF/VHF: coaxial neodymium compression  
driver with 3.5" (90 mm) HF diaphram  
and 1.75" (44 mm) VHF diaphram  
Enclosure  
Quasi B4 alignment, ported  
enclosure with fully flared  
ports, symmetrical port design,  
tuned to 36 Hz, constructed  
of MDF and heavily braced.  
Features vandal resistant  
woofer mounting bolts  
Tilt/Pan Bracket  
10° vertical tilt  
10° horizontal pan  
The LF-4115 single 15" (381mm) low-frequency  
enclosure is designed specifically to address the  
extended low-frequency response required for cinema  
applications. The LF-4115 covers the frequency range  
from 35 Hz to 250 Hz.  
Dimensions (HWD)  
18.5" x 30" x 20.3"  
39" x 30" x 20"  
(470 mm x 762 mm x 516 mm) (990 mm x 762 mm x 508 mm)  
83 lbs (38 kg) 84 lbs (38.5 kg)  
167 lbs (76.5 kg)  
58.75" x 32"  
The SC-414 is designed for ease of installation. The  
MHV-1090 components come pre-assembled to  
reduce field assembly time. Three bolts are all that are  
required to secure the MHV-1090 to the top of the  
LF-4115 enclosure.  
Weight - Net  
System Weight  
Baffle Cut-Out  
THX is a trademark of THX Ltd.  
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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