QSC SC-423C – Bi/Tri-Amp 3-Way 2x15-Inch Cinema Screen Channel Loudspeaker

Product Overview

The QSC SC-423C is a three-way, selectable bi- or tri-amplified screen channel loudspeaker from the DCS Digital Cinema Series, developed for professional motion-picture playback. It comprises the MH-1075C mid-high frequency system and the LF-4215 dual-15-inch low-frequency system.

Engineered for articulate dialogue and solid output, the SC-423C suits mid-to-large cinema auditoriums and premium screening environments.

Product Description

The MH-1075C mid-high system features a high-output, horn-loaded 10-inch midrange cone driver and a 3-inch (75 mm) titanium-diaphragm compression driver on an adjustable pan-and-tilt bracket. It includes a driver-protection network and a passive crossover for bi-amp operation, with power-limiter circuitry protecting the high-frequency driver.

The high-power 10-inch cone driver operates as low as 250 Hz, and advanced phase-plug coupling permits a crossover point up to 1800 Hz to the high-frequency horn, reproducing most of the dialogue range from a single element for unmatched intelligibility. The LF-4215 dual-15-inch enclosure is heavily braced MDF.

Low-distortion waveguides deliver articulate dialogue, and a shallow 20-inch depth facilitates installation. As part of the QSC DCS ecosystem, the SC-423C integrates with QSC cinema subwoofers, surrounds, amplifiers, and processors.

Key Features

• Three-way selectable bi- or tri-amp — Operates in selectable bi-amplified or tri-amplified configurations for precise system control.
• MH-1075C mid-high system and LF-4215 low-frequency system components — Built from the MH-1075C mid-high system and LF-4215 low-frequency system for proven cinema performance.
• Extended-coverage mid-high — The mid-high system provides 90° horizontal by +20° to -30° vertical coverage, with a 3 in (75 mm) titanium-diaphragm compression driver and 10-inch midrange for articulate dialogue.
• Single-element dialogue range — A high-power 10-inch cone driver operates as low as 250 Hz with a crossover up to 1800 Hz, so most of the dialogue range is reproduced by a single element for unmatched intelligibility.
• Heavily braced LF enclosure — The 2x15 in low-frequency enclosure is constructed of MDF and heavily braced for solid bass.
• Low-distortion waveguides — Waveguides provide highly articulate dialogue for intelligible cinema playback.
• Shallow 20-inch depth — Reduces required behind-screen clearance to facilitate installation.

Typical Applications

• Auditorium
• Broadcast studio
• Multi-purpose room

Technical Specifications

Frequently Asked Questions

What is the difference between the SC-423C and SC-413C?
The SC-423C uses a dual-15-inch LF-4215 enclosure and a 3-inch (75 mm) HF compression driver for higher output, while the SC-413C uses a single-15-inch LF-4115 and a 2.5-inch HF driver.

Can the SC-423C be tri-amplified?
Yes. It supports selectable bi- or tri-amplified operation; tri-amp mode drives LF, MF, and HF from separate channels via an external cinema processor.

What room size is the SC-423C suited to?
Its dual-15-inch low-frequency system and high-output mid-high make it appropriate for mid-to-large cinema auditoriums.

What warranty and support come with this loudspeaker?
QSC installed loudspeakers are covered under QSC's standard limited warranty; refer to QSC's published warranty terms for the current coverage period applicable to this model. Creation Networks provides pre- and post-sale support for system design and integration questions.