QSC
Loa màn hình (screen) cinema QSC SC-444
Product code: QSC SC-444
Detailed Description
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
- 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-444 | |
|---|---|---|
| Nominal Coverage | 90° horizontal by +20 to -30° vertical | |
| Frequency Range (-6 dB) | 33 – 20 kHz | |
| Active Crossover Frequencies | 280, 1700, and 6000 Hz, 24 dB per octave | |
| LF-4215 (2) | MHV-1090 | |
| Impedance | 4 ohms each | MF: 8 ohms HF: 8 ohms VHF: 8 ohms |
| Sensitivity 1 watt/1 meter, half space | 102.5 dB | |
| Maximum Input Power 1 | ||
| 8 hours of 6 dB crest factor IEC 268 noise spectrum | 800 watts continuous each | |
| 2 hours of 6 dB crest factor pink noise, 50 Hz–20 kHz, AES method | 1000 watts continuous each | |
| Recommended Amplifier Power | 1600 watts continuous maximum each | MF: 800 W continuous HF: 500 W continuous VHF: 300 W continuous maximum |
| Recommended Processing | Subsonic filter below 30 Hz, >18 dB per octave | 4th order LR crossover at 280, 1700 and 6000 Hz via QSC processing |
| Connectors | Barrier strip screw terminals accept up to #10 AWG stranded wire | Barrier strip screw terminals accept up to #10 AWG stranded wire |
| Transducers | Four 15-inch (381 mm) high efficiency, extended bass woofer featuring a 4-inch copper voice coils | MF: 10-inch high-effeciency, horn-loaded cone with pahse plug HF/VHF: coaxial neodymium compression driver with 3.5-inch (90 mm) HF diaphram and 1.75-inch (44 mm) VHF diaphram |
| 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 | Tilt/Pan Bracket ± 10° vertical tilt ± 10° horizontal pan |
| Dimensions (HWD) inches | 72 × 30 × 20.3 | 39 × 30 × 20 |
| Dimensions (HWD) mm | 762 x 1820 x 516 | 762 x 990 x 508 |
| Net Weight | 344 lb (156 kg) | 84 lb (38.5 kg) |
| System Weight | 428 lb (193.5 kg) | |
| Baffle Cut-Out | 111.6-inch × 32-inch |
1 Maximum input power tested in accordance with IEC 268-5 recommendations, 50 Hz – 20 kHz band limiting, 6 dB signal crest factor.
Specifications are subject to change without notice.