NEW! SC-434

Cinema Loudspeaker System

Features

4-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-4315 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-434

 

 

 

 

 

 

extends QSC’s commitment to the cinema market. As

 

 

 

 

 

 

a member of the DCS Digital Cinema Speaker Series,

 

 

Specifications

SC-434

 

 

the SC-434 is a 4-way, selectable tri or quad-amplified

 

 

 

 

screen channel loudspeaker system comprised of two

 

 

Nominal Coverage

90° horizontal x +20 to -30° vertical

 

main units–the MHV-1090 high-frequency system and

 

 

 

 

 

 

 

 

Frequency Range (-6 dB)

33 – 20 kHz

 

 

the LF-4315 low-frequency system.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Active Crossover Frequencies

250, 1700 and 6000 Hz, 24 dB per octave

 

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

 

 

 

 

 

 

 

 

 

 

 

 

LF-4315

MHV-1090

 

high output, horn loaded 10" midrange cone driver

 

 

 

 

 

 

 

 

 

 

and

a coaxial

neodymium

high-frequency/very

high-

 

 

 

 

 

 

 

 

Impedance

5.5Ω

MF: 8Ω HF: 8Ω VHF: 8Ω

frequency compression driver. The MHV-1090 includes

 

 

 

 

Sensitivity 1 watt /1 meter,

99.5 dB

Tri-amp

Quad-amp

a driver protection network and a passive crossover for

 

 

 

 

half space

 

MF:105 dB

MF: 105 dB

tri-amp operation. The protection circuitry prevents low-

 

 

 

 

 

 

 

HF/VHF: 110 dB

HF: 110 dB

frequency signals from damaging the high-frequency

 

 

 

 

 

VHF: 110 dB

and very high-frequency driver. A high power 10"

 

 

Maximum Input Power1

 

 

 

cone

driver allows

operation

as low as

250 Hz and

 

 

 

 

 

 

 

 

8 hours of 6 db crest factor

1200 W RMS

MF: 275 W RMS

MF: 275 W RMS

the advanced phase plug coupling permits a crossover

 

 

 

 

IEC 268 noise spectrum

 

HF/VHF: 230 W RMS

HF: 150 W RMS

point of up to 1800 Hz to the high-frequency horn. This

 

 

 

 

 

 

 

 

VHF: 80 W RMS

ensures that most of the dialog range is reproduced by

 

 

 

 

 

 

 

 

 

 

 

 

 

2 hours of 6 db crest factor

1500 W RMS

MF: 800 W RMS

 

a single element, for unmatched intelligibility.

 

 

 

 

 

 

 

pink noise, 50 Hz – 20

 

HF/VHF: 500 W RMS maximum

 

 

 

 

 

 

 

 

 

 

 

The

coaxial

neodymium

high-frequency/very

high-

 

 

kHz,

 

 

 

frequency compression driver provides a dramatic

 

 

AES method

 

 

 

improvement

in

dynamic

response,

clarity

and

 

 

Recommended

2400 W RMS maximum

MF: 800 W RMS

 

transparency.

The

annular

high-frequency diaphragm

 

 

Amplifier Power

 

HF: 500 W RMS

 

 

 

 

 

VHF: 300 W RMS maximum

covers the frequency range between 1800 and 7000

 

 

 

 

 

 

 

 

 

 

 

 

Recommended Processing

Subsonic filter below 30 Hz,

4th order LR crossover at 250, 1700 and

Hz with a smooth, linear response. The large diaphragm

 

 

excursion of +/-0.8 mm results in high output and

 

 

 

>18 dB per octave

6000 Hz via QSC DCM or QSControl.net™

increased power handling. The very high-frequency driver

 

 

Connectors

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

covers the frequency range from 7000 to 22,000 Hz and

 

 

Transducers

Three 15" (381mm) high

MF: 10" high-effeciency, horn-loaded cone

eliminates the dome break up of conventional drivers that

 

 

 

efficiency, extended bass

with pahse plug

 

can cause resonance and harsh, metallic sound.

 

 

 

 

woofer featuring a 4" copper

HF/VHF: coaxial neodymium compression

The LF-4315 triple 15" (381 mm) low-frequency

 

 

 

voice coils

driver with 3.5" (90 mm) HF diaphram

 

 

 

 

and 1.75" (44 mm) VHF diaphram

enclosure is designed specifically to address the extended

 

 

 

 

 

 

 

 

Enclosure

Quasi B4 alignment, ported

Tilt/Pan Bracket

 

low-frequency response required for cinema applications.

 

 

 

 

 

 

enclosure with fully flared

±10° vertical tilt

 

The LF-4315 covers the frequency range from 35 Hz to

 

 

 

ports, symmetrical port design,

±10° horizontal pan

 

250 Hz. Close Coupled Woofers (CCW), with their tight

 

 

 

tuned to 36 Hz, constructed

 

 

 

 

 

of MDF and heavily braced.

 

 

spacing between woofers, improves coupling and keeps

 

 

 

 

 

 

 

 

Features vandal resistant

 

 

coverage angles wide over

a

greater frequency

range

 

 

 

 

 

 

 

 

woofer mounting bolts

 

 

than more widely spaced designs.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dimensions (HWD)

53" x 30" x 20.3"

39" x 30" x 20"

 

 

 

 

 

 

 

 

 

 

 

 

The SC-434 is designed for ease of installation. The

 

 

 

(1344 mm x 762 mm x 516 mm)

(990 mm x 762 mm x 508 mm)

MHV-1090 components come pre-assembled to reduce

 

 

Weight – Net

260 lb (118 kg)

84 lb (38.5 kg)

 

field assembly time. Three bolts are all that are required

 

 

 

 

 

 

 

 

System Weight

344 lb (155.5 kg)

 

to secure the MHV-1090 to the top of the LF-4315

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

enclosure.

 

 

 

 

 

 

 

 

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 SC-434 specifications Features, Specifications

SC-434 specifications

The QSC Audio SC-434 is a powerful loudspeaker designed specifically for demanding professional audio environments. Its engineering combines robust construction with state-of-the-art sound performance, making it a preferred choice for live events, installations, and various audio applications.

One of the main features of the SC-434 is its bi-amplified design, which separates the low and high frequencies for improved clarity and efficiency. This bi-amplification allows the speaker to deliver a coherent sound that minimizes distortion while maximizing the overall power handling capability. With a continuous power rating of 900 watts and peak power capabilities significantly higher, the SC-434 is built to deliver high output levels suitable for large venues.

The high-frequency section utilizes a custom-designed 1.4-inch (35 mm) compression driver, ensuring exceptional high-frequency response and dispersion. QSC's Waveguide technology enhances directivity control, allowing for even coverage across the audience area. As a result, listeners experience a consistent tonal quality regardless of their position in the venue.

The low-frequency driver features a robust 12-inch cone, designed to reproduce deep bass with remarkable precision. The design of the enclosure is optimized for bass reflex performance, providing rich low-end response that complements the highs effectively. Furthermore, the cabinet is constructed from durable materials that ensure longevity, even in the rigors of tour life.

Another standout technology in the SC-434 is its integrated protection circuitry. This system safeguards the drivers from over-excursion and thermal damage, enhancing reliability during extended use. Additionally, the speaker includes a versatile input panel that supports various connectivity options, making it adaptable for different setups.

In terms of installation, the SC-434 is equipped with multiple mounting points, allowing for flexible rigging and placement options in any audio setup. Its sleek and professional design not only matches its high performance but also blends seamlessly into various environments, from concert halls to corporate venues.

Overall, the QSC Audio SC-434 combines innovative technology with professional-grade performance. Its powerful acoustic capabilities, along with durable construction and flexible installation options, make it an essential tool for audio professionals seeking reliable and high-fidelity sound reproduction in any live or installed setting. Whether used alone or as part of a larger system, the SC-434 continues to set a standard for loudspeaker performance in the industry.