SC-424-8F

SC-424-8F

Cinema Loudspeaker System

Features

• Flyable 4-way selectable tri- or quad-amplified screen channel system

• Constructed of heavily braced, 15 mm tour-grade plywood

• Sixteen M10 attachment points per enclosure for safe and easy suspension with installer provided hardware

• Common dimensions of Mid/

High and LF enclosures facilitate easy installation in vertical or horizontal arrays

• Unique HF/VHF diaphragm has less mass than traditional diaphragms resulting in exceptional dynamic range, extended high frequency response and lower distortion

• Low-distortion waveguides provide highly articulate dialogue

The SC-424-8F (shown with installer provided mounting hardware) may be configured to fly in either a vertical or horizontal orientation.

Developed specifically for the unique requirements of Large Format motion picture playback, the SC-424C-8F extends

QSC’s commitment to the cinema market.

As a member of the DCS Digital Cinema

Speaker Series, the SC-424-8F is a 4-way, selectable tri or quad-amplified screen channel loudspeaker system comprised of two main units – the MHV-1090F midhigh-very high-frequency system and the

LF-4215-8F low-frequency system. The two sections can be joined together to create a single, flyable unit.

The MHV-1090F 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-1090F 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.

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 7000 to

22,000 Hz and eliminates the dome break up of conventional drivers that can cause resonance and harsh, metallic sound.

The LF-4215-8F dual 15” (381 mm) low-frequency enclosure is designed specifically to address the extended lowfrequency response required for cinema applications. The LF-4215-8F covers the frequency range from 35 Hz to 250 Hz.

Close coupled woofers (CCW), with their tight spacing between woofers, improves coupling and keeps coverage angles wide over a greater frequency range than more widely spaced designs.

The SC-424-8F is designed for ease of installation. The MHV-1090F and LF-4215-8F components come pre-assembled to reduce field assembly time. Both enclosures have the same dimensions to allow stacked or side-by-side arrays. Each enclosure is fitted with sixteen M10 attachments points for safe and secure suspension. All mounting hardware must be provided by the installer.

SC-424-8F Details

Specifications

Nominal Coverage

Frequency Range (-6 dB)

Active Crossover Frequencies

SC-424-8F

90° horizontal x +20 to -30° vertical

33 Hz – 22 kHz

250, 1700, 6 kHz, 24 dB per octave

LF-4215-8F MHV-1090F

Impedance

Sensitivity 1 watt /1 meter, half space

Maximum Input Power 1

8 hours of 6 dB crest factor IEC 268 noise spectrum

2 hours of 6 dB crest factor pink noise,

200 Hz – 2 kHz, AES method

Recommended

Amplifier Power

Recommended Processing

8Ω

99.5 dB

Connectors

Pin Outs

Transducers

Enclosure

Dimensions (HWD)

Weight – Net / Shipping

System Weight – Net / Shipping

MF: 8Ω HF: 8Ω VHF: 8Ω

MF:105 dB

HF/VHF: 107.5 dB

800 W RMS

1000 W RMS

1600 W RMS maximum

Subsonic filter below 30 Hz,

>18 dB per octave

Neutrik Speakon™ NL4

1+/1- LF; 2+/2- no connection

MF: 185 W RMS

HF/VHF: 155 W RMS

MF: 275 W RMS

HF/VHF: 230 W RMS maximum

MF: 800 W RMS maximum

HF/VHF: 500 W RMS maximum

4th order LR crossover at 300 and 1700 Hz via QSC processor

Neutrik Speakon™ NL4

1+/1- MF; 2+/2- HF/VHF

Two 15" (381 mm) high-efficiency, extended bass woofers featuring 4" copper voice coils

MF: 10" high-efficiency, horn-loaded cone with phase plug HF/VHF: coaxial neodymium compression driver with 3.5" (90 mm) HF voice coil and 1.75" (44 mm) VHF voice coil

Heavily braced 15 mm tour-grade plywood with sixteen M10 load-rated attachments points

40" x 31.5" x 19"

(1016 mm x 800.1 mm x 482.6 mm)

40" x 31.5" x 19"

(1016 mm x 800.1 mm x 482.6 mm)

134 lb (61 kg) / 144 lb (65 kg) 121 lb (54.8 kg) / 132 lb (59.7 kg)

255 lb (116 kg) / 276 lb (125 kg)

Specifications subject to change without notice.

1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174

© 2013 QSC Audio Products, LLC. All rights reserved. QSC and the QSC logo are registered trademarks of QSC Audio Products, LLC in the U.S. Patent and

Trademark office and other countries. Speakon is a registered trademark of Neutrik.

SC-424-8F Spec Sheet 06/04/2013 please recycle