NEW! SC-324

Cinema Loudspeaker System

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-3215 is constructed of MDF and features single woofer chambers

Low-distortion waveguides provide highly articulate dialogue

Shallow depth (20") facilitates installation

THX™ approved for professional cinema applications

Developed specifically for the unique requirements

 

 

 

 

 

of professional motion picture playback, the SC-324

 

 

 

 

 

extends QSC’s commitment to the cinema market.

 

 

 

 

 

As a member of the DCS Digital Cinema Speaker

 

Specifications

SC-324

 

 

Series, the SC-324 is a four-way, selectable tri or

 

 

 

quad-amplified screen channel loudspeaker system

 

Nominal Coverage

90° horizontal x +20 to -30° vertical

 

comprised of two main units - the MHV-1090 mid-

 

 

 

 

 

 

 

 

Frequency Range (-6 dB)

33 - 20 kHz

 

 

high-very high-frequency system and the LF-3215

 

 

 

 

 

 

 

 

low-frequency system.

 

 

 

 

Active Crossover Frequencies

250, 1700 and 6000 Hz, 24 dB per octave

 

The MHV-1090 mid-high-very high system features

 

 

 

 

 

 

 

LF-3215

MHV-1090

 

a high output, horn loaded 10" midrange cone

 

 

 

 

 

 

 

 

driver and a coaxial neodymium high-frequency/very

 

Impedance

4Ω

MF: 8Ω HF: 8Ω VHF: 8Ω

high-frequency compression driver . The MHV-1090

 

Sensitivity 1 watt /1 meter,

98.5 dB

Tri-amp

Quad-amp

includes a driver protection

network and a passive

 

 

half space

 

MF:105 dB

MF: 105 dB

crossover for tri-amp operation. The protection circuitry

 

 

 

 

 

HF/VHF: 110 dB

HF: 110 dB

prevents low-frequency signals from damaging the

 

 

 

 

 

 

 

VHF: 110 dB

high-frequency and very high-frequency driver. A

 

 

 

 

 

 

Maximum Input Power1

 

 

 

high power 10" cone driver allows operation as low

 

 

 

 

 

 

 

 

 

as 250 Hz and the advanced phase plug coupling

 

8 hours of 6 db crest factor

600 W RMS

MF: 275 W RMS

MF: 275 W RMS

permits a crossover point of up to 1800 Hz to the

 

 

IEC 268 noise spectrum

 

HF/VHF: 230 W RMS

HF: 150 W RMS

high-frequency horn. This ensures that most of the

 

 

 

 

VHF: 80 W RMS

dialog range is reproduced by a single element, for

 

 

 

 

 

 

2 hours of 6 db crest factor

800 W RMS

MF: 800 W RMS

 

unmatched intelligibility.

 

 

 

 

 

 

 

 

 

pink noise, 50 Hz - 20 kHz,

 

HF/VHF: 500 W RMS maximum

 

 

 

 

 

 

The coaxial neodymium high-frequency/very high-

 

AES method

 

 

 

frequency compression driver provides

a dramatic

 

Recommended

1200 W RMS maximum

MF: 800 W RMS

 

improvement in dynamic

response,

clarity

and

 

 

 

Amplifier Power

 

HF: 500 W RMS

 

transparency. The annular high-frequency diaphragm

 

 

 

 

 

 

VHF: 300 W RMS maximum

covers the frequency range between

1800

and

 

 

 

 

 

 

Recommended Processing

Subsonic filter below 30 Hz,

4th order LR crossover at 250, 1700 and

7000 Hz with a smooth, linear response. The large

 

 

 

>18 dB per octave

6000 Hz via QSC DCM or QSControl.net

diaphragm excursion of +/-0.8 mm results in high

 

 

 

 

 

 

 

 

Connectors

Barrier strip screw terminals accept up to #10 AWG stranded wire

output and increased power handling. The very high-

 

frequency driver covers the frequency range from

 

Transducers

Two 15" (381mm) high

MF: 10" high-effeciency, horn-loaded

7000 to 22,000 Hz and eliminates the dome break

 

 

efficiency, extended bass

cone with pahse plug

 

up of conventional drivers that can cause resonance

 

 

woofer featuring a 3" copper

HF/VHF: coaxial neodymium compression

and harsh, metallic sound.

 

 

 

 

 

voice coils

driver with 3.5" (90 mm) HF diaphram

The LF-3215 dual 15" (381mm) low-frequency

 

 

 

and 1.75" (44 mm) VHF diaphram

 

 

 

 

 

 

Enclosure

Quasi B4 alignment, ported

Tilt/Pan Bracket

 

enclosure is designed specifically to address the

 

 

extended low-frequency response required for cinema

 

 

enclosure with fully flared

±10° vertical tilt

 

applications. The LF-3215 covers the frequency range

 

 

ports, symmetrical port design,

±10° horizontal pan

 

from 35 Hz to 250 Hz. Close Coupled Woofers (CCW),

 

 

tuned to 36 Hz, constructed

 

 

with their tight spacing between woofers, improves

 

 

of MDF and heavily braced.

 

 

 

 

Features vandal resistant

 

 

coupling and keeps coverage angles wide over a greater

 

 

 

 

 

 

woofer mounting bolts

 

 

frequency range than more widely spaced designs.

 

 

 

 

 

 

 

 

 

 

 

 

 

Dimensions (HWD)

36" x 30" x 20.3"

39" x 30" x 20"

 

The SC-324 is designed for ease of installation. The

 

 

 

 

(910 mm x 762 mm x 516 mm)

(990 mm x 762 mm x 508 mm)

MHV-1090 components come pre-assembled to

 

 

 

 

 

 

 

 

Weight - Net

172 lbs (78 kg)

84 lbs (38.5 kg)

 

reduce field assembly time. Three bolts are all that are

 

 

required to secure the MHV-1090 to the top of the

 

System Weight

256 lbs (116 kg)

 

LF-3215 enclosure.

 

 

 

 

 

 

 

 

 

 

 

 

Baffle Cut-Out

76" x 32"

 

 

 

 

 

 

 

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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QSC Audio specifications NEW! SC-324, Cinema Loudspeaker System, Features, Specifications