Système de haut-parleurs cinéma Q-SYS SC-424 tri ou quadruple ampli 4 voies 2 x 15 pouces avec LF-4215 et MHV-1090

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Description

Q-SYS SC-424 Tri or Quad-Amp 4-Way 2x15-inch Cinema Loudspeaker System with LF-4215 and MHV-1090

Developed specifically for the unique requirements of professional motion picture playback, the SC-424 extends QSC’s commitment to the cinema market. As a member of the DCS Digital Cinema Speaker Series, the SC-424 is a 4-way, selectable tri or quad-amplified screen channel loudspeaker system comprised of two main units – the MHV-1090 mid-high-very high-frequency system and the LF-4215 low-frequency system.

The MHV-1090 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-1090 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 dual 15” (381mm) low frequency enclosure is designed specifically to address the extended low-frequency response required for cinema applications. The LF-4215 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 is designed for ease of installation. The MHV-1090 components come pre-assembled to reduce field assembly time. Three bolts are all that are required to secure the MHV-1090 to the top of the LF-4215 enclosure.

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-4215 is constructed of MDF and is heavily braced
  • Low-distortion waveguides provide highly articulate dialogue
  • Shallow depth (20-inch) facilitates installation

Specifications:

  • SC-424:
    • Nominal Coverage: 90° horizontal by +20 to -30° vertical
    • Frequency Range: (-6 dB) 33 Hz–20 kHz
    • Active Crossover Frequencies: 250, 1700, and 6000 Hz, 24 dB per octave
  • LF-4215:
    • Impedance: 4 ohms
    • Sensitivity:
      • 1 watt/1 meter, half space: 99.5 dB
      • 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
    • Power Handling:
      • MF: 800 W continuous
      • HF: 500 W continuous
      • VHF: 300 W 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
    • Drivers:
      • Two 15-inch (381mm) 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): 36 × 30 × 20.3
      • HWD (mm): 762 x 910 x 516
    • Weight:
      • Net Weight: 84 lb (38.5 kg)
      • System Weight: 256 lb (116 kg)
    • Baffle Cut-Out: 76-inch × 32-inch
  • MHV-1090:
    • Impedance:
      • MF: 8 ohms
      • HF: 8 ohms
      • VHF: 8 ohms
    • Sensitivity (1 watt/1 meter, half space):
      • Tri-amp:
        • MF: 105 dB
        • HF/VHF: 110 dB
      • Quad-amp:
        • MF: 105 dB
        • HF: 110 dB
        • VHF: 110 dB
    • Power Handling (2 hours of 6 dB crest factor pink noise, 50 Hz–20 kHz, AES method):
      • Tri-amp:
        • MF: 275 W continuous
        • HF/VHF: 200 W continuous
      • Quad-amp:
        • MF: 275 W continuous
        • HF: 100 W continuous
        • VHF: 100 W continuous
    • Recommended Amplifier Power:
      • MF: 800 W continuous
      • HF: 500 W continuous
      • VHF: 300 W continuous maximum
    • Recommended Processing: 4th order LR crossover at 250, 1700, and 6000 Hz via QSC processing
    • Connectors: Barrier strip screw terminals accept up to #10 AWG stranded wire
    • Transducers:
      • MF: 10-inch high-efficiency, horn-loaded cone with phase plug
      • HF/VHF: coaxial neodymium compression driver with 3.5-inch (90 mm) HF diaphragm and 1.75-inch (44 mm) VHF diaphragm
    • Enclosure:
      • Tilt/Pan Bracket:
        • ± 10° vertical tilt
        • ± 10° horizontal pan
    • Dimensions:
      • HWD (inches): 39 × 30 × 20
      • HWD (mm): 762 x 990 x 508
    • Net Weight: 84 lb (38.5 kg)

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