Q-SYS SC-414 Tri or Quad-Amplifier 4-Way 1x15-inch Cinema Loudspeaker System with LF-4115 and MHV-1090

Q-SYS SC-414

Developed specifically for the unique requirements of professional motion picture playback, the SC-414 extends QSC’s commitment to the cinema market. As a member of the DCS Digital Cinema Speaker Series, the SC-414 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-4115 low- frequency system.

LF-4115

The LF-4115 single 15” (381 mm) low- frequency enclosure is designed specifically to address the extended low-frequency response required for cinema applications. The LF-4115 covers the frequency range from 35 Hz to 250 Hz.

MHV-1090

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

Features:

• Four-way selectable, tri or quad-amplified screen channel system
• Unique HF/VHF diaphragm with less mass than traditional diaphragms for exceptional dynamic range, extended high-frequency response, and lower distortion
• LF-4115 is constructed of MDF and is heavily braced
• Low-distortion waveguides provide highly articulate dialogue
• Shallow depth (20-inch) facilitates installation

Specifications:

• Q-SYS SC-414:
  • Four-way selectable, tri or quad-amplified screen channel system
  • Unique HF/VHF diaphragm with less mass than traditional diaphragms for exceptional dynamic range, extended high-frequency response, and lower distortion
  • LF-4115 is constructed of MDF and is heavily braced
  • Low-distortion waveguides provide highly articulate dialogue
  • Shallow depth (20-inch) facilitates installation
• LF-4115:
  • Impedance: 4 ohms
  • Sensitivity 1 watt/1 meter, half space: 96.5 dB
  • 8 hours of 6 dB crest factor IEC 268 noise spectrum: 400 watts continuous
  • 2 hours of 6 dB crest factor pink noise, 50 Hz–20 kHz, AES method: 500 watts continuous
  • Recommended Amplifier Power: 800 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: One 15-inch (381 mm) high efficiency, extended bass woofer featuring a 4-inch copper voice coil
  • 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: 18.5 × 30 × 20.3
  • Dimensions (HWD) mm: 762 x 470 x 516
  • Net Weight: 83 lb (38 kg)
  • System Weight: 167 lb (76.5 kg)
  • Baffle Cut-Out: 58.75-inch × 32-inch
• MHV-1090:
  • Frequency Range: 180 - 20k Hz (-6dB, full space)
  • Nominal Coverage: 90° horizontal X +20 to -30° vertical (50° total, adjustable mount provides for vertical plane adjustments. The horizontal plane can be adjusted by altering mounting position on the low frequency enclosure before tightening bolts.)
  • Directivity Index (DI): 9 dB (400 to 16k Hz average)
  • Q: 8 (400 to 16k Hz average)
  • Max. Output:
    • Calculated Mid frequency: 135.5 dB SPL (1 meter, full space)
    • Tri-amp mode: high frequency/very high frequency 138 dB SPL
    • Quad-amp mode: high frequency 138 dB SPL, very high frequency 135 dB SPL
  • Impedance:
    • Tri-amp mode: 8 ohms nominal, mid frequency and high/very high frequency
    • Quad-amp mode: 8 ohms nominal, mid, high, and very high frequency
  • Maximum Input Power:
    • Mid frequency: 275 W (AES method, 2 hours)
    • Tri-amp mode: high/very high frequency 155 W (calculated, sum of high and very high frequency individual ratings)
    • Quad-amp mode: high frequency 85 W, very high frequency 70 W
  • Sensitivity:
    • Mid frequency: 105 dB SPL (1 Watt, 1 meter)
    • Tri-amp mode: high/very high frequency 110 dB SPL
    • Quad-amp mode: high frequency 110 dB SPL, very high frequency 110 dB SPL
  • Crossover Frequencies:
    • Tri-amp mode: mid frequency 250 Hz or higher, high/very frequency 1.7 kHz, both 24 dB/octave
    • Quad-amp mode: mid frequency 250 Hz or higher, high frequency 1.7 kHz, very high frequency 6.0 kHz, all 24 dB/octave
  • Crossover Network: High frequency to very high frequency crossover at 7 kHz, 12 dB per octave, only in tri-amp mode. Quad-amp mode switch setting removes crossover circuit from signal path, but leaves DC blocking capacitors in circuit.
  • Connectors:
    • Mid frequency driver: barrier strip screw terminals on mid frequency driver accept up to #10 AWG stranded wire
    • High frequency, very high frequency drivers: barrier strip screw terminals accept up to #10 AWG stranded wire
    • Tri-amp mode: connect high frequency/very high frequency program only to VHF/HF INPUTS terminals
    • Quad-amp mode: connect high frequency program to HF INPUTS terminals and connect very high frequency program to VHF INPUTS terminals
  • Transducers:
    • Mid frequency: 10" high efficiency mid-range, phase-ring loaded
    • High frequency: 1.5" exit, 3.5" voice coil polyester diaphragm coaxial compression driver
    • Very High frequency: 1.5" exit, 1.75" voice coil polyester diaphragm coaxial compression driver
  • Mounting Hardware: Attaches to top of QSC’s low frequency cinema enclosures using three 5/16”-18 x 3/4” long bolts (supplied on low frequency enclosure)
  • Size: 39” high x 30” wide x 20” deep (991 x 762 x 508mm)
  • Weight: 73.5 lb. (33 kg) net