Q-SYS SC-443C Bi or Tri-Amp 3-Way 4x15-inch Cinema Loudspeaker System with 2x LF-4215 and MH-1075C

Developed specifically for the unique requirements of professional motion picture playback, the SC-443C extends QSC’s commitment to the cinema market. As a member of the DCS Digital Cinema Speaker Series, the SC-443C is a 3-way, selectable bi or tri-amplified screen channel loudspeaker system comprised of three main units—the MH-1075C high-frequency system and dual LF-4215 low-frequency systems.

The MH-1075C mid-high system features a high output, horn loaded 10” midrange cone driver and a 3” (75 mm) titanium diaphragm compression driver mounted to an adjustable pan and tilt bracket. The MH-1075C includes a driver protection network and a passive crossover for bi-amp operation. Power limiter circuitry protects the high-frequency driver from overpowering. The MH-1075C provides extended frequency coverage for the critical midrange band. 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 LF-4215 dual 15” (381mm) low frequency enclosures are designed specifically to address the extended low frequency response required for cinema applications. The dual LF-4215s cover 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-443C is designed for ease of installation. The MH-1075C components come pre-assembled to reduce field assembly time. Three bolts are all that are required to secure the MH-1075C to the top of the LF-4215 enclosure.

Features:

• Three-way selectable, bi or tri- amplified screen channel system
• MH-1075C provides 90° horizontal by +20° to -30° vertical coverage
• Two LF-4215 enclosures, constructed of MDF each features two single woofer chambers
• Low-distortion waveguides provide highly articulate dialogue
• Shallow depth (20-inch) facilitates installation

Specifications:

• SC-443C:
  • Nominal Coverage: 90° horizontal by +20 to -30° vertical
  • Frequency Range: (-6 dB) 32 Hz–16 kHz
  • Crossover Frequency: 250 and 1700 Hz, 24 dB per octave
• LF-4215:
  • Impedance: 4 ohms
  • Sensitivity 1 watt/1 meter, half space: 99.5 dB
  • Maximum Input Power:
    • (8 hours of 6 dB crest factor IEC 268 noise spectrum): 800 watts continuous
    • (2 hours of 6 dB crest factor pink noise, 50 Hz–20 kHz, AES method): 1000 watts continuous
  • Recommended Amplifier Power: 1600 watts continuous maximum
  • Recommended Processing: Subsonic filter below 30 Hz, >18 dB per octave
  • Connectors: Barrier strip screw terminals accept up to #10 AWG stranded wire
  • Transducers: Two 15-inch (381 mm) high efficiency, extended bass woofers featuring 4-inch copper voice coils
  • 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
  • Dimensions:
    • (HWD) inches: 30 × 36 × 20.3
    • (HWD) mm: 910 x 762 x 516
  • Net Weight: 172 lb (78 kg)
  • System Weight: 257 lb (117 kg)
  • Baffle Cut-Out: 111.6-inch × 32-inch
• MH-1075C:
  • Impedance: 8 ohms
  • Sensitivity 1 watt/1 meter, half space:
    • Bi-amp: 105 dB
    • Tri-amp:
      • MF: 105 dB
      • HF: 107.5 dB
  • Maximum Input Power:
    • (8 hours of 6 dB crest factor IEC 268 noise spectrum):
      • 350 W continuous passive mid-high
      • 275 W continuous
      • 75 W continuous
    • (2 hours of 6 dB crest factor pink noise, 50 Hz–20 kHz, AES method): 350 watts continuous
  • Recommended Amplifier Power: 800 watts continuous maximum
  • Recommended Processing: 4th order LR crossover at 250 & 1700 Hz via QSC processing
  • Connectors: Barrier strip screw terminals accept up to #10 AWG stranded wire
  • Transducers: 10-inch high efficiency mid range, 1.5-inch (38 mm) exit, 3-inch titanium diaphragm compression driver
  • Enclosure:
    • Tilt/Pan Bracket
    • ±10° vertical tilt
    • ±10° horizontal pan
  • Dimensions:
    • (HWD) inches: 30 × 39 × 20
    • (HWD) mm: 990 x 762 x 508
  • Net Weight: 85 lb (39 kg)