LF Components
QSC announces divestiture of its Digital Cinema Series product line to Moving iMage Technologies, including the Screen Channel (“SC”), Subwoofer (“SB”), Surround (“SR”), and Screen Channel (“RSC”) product lines.
For all inquiries, please visit DSCreference.com or contact [email protected]
Designed not only to deliver, but to thrive on today’s pushed-to-the-max soundtracks, QSC low-frequency components bring out the full richness of screen channel sound. Unlike re-purposed rock and roll PA cabinets, our LF components are built from the ground up with cinema-specific details that speed up installation. For example, offset terminal cups and pre-installed rubber feet.
We also enhance performance with smart design by using tight driver spacing in our multi-driver boxes to improve coupling and widen coverage angles. LF components are the foundation of full, clear screen channel sound, and nobody builds better screen channel enclosures than QSC.
1 Driver Models
| Model | LF-3115 | LF-4115 |
| System Models | 2-way: SC-312XC | 2-way: SC-412C |
| Driver Information | 15" (381 mm) | 15" (381 mm) |
| Impedance | 8Ω | 4Ω |
| Rated Noise Power1 | 400 W RMS | 500 W RMS |
| Sensitivity2 | 95.5 dB | 95.5 dB |
| Dimensions (HWD) inches | 18.63 x 30 x 20.25 | 18.63 x 30 x 20.25 |
| Dimensions (HWD) mm | 473.2 x 762 x 514.4 | 473.2 x 762 x 514.4 |
1 2 hours of 6 dB crest factor pink noise, AES method.
2 Based on nominal impedance, measured in half space 1 W @ 1 m.
LF components connect with barrier strip screw terminals that accept up to #10 AWG stranded wire except for LF-4215-8F, which uses Neutrik Speakon™ NL4.
2 Driver Models
| Model | 2150-LF | LF-4215 | LF-4215-8 | LF-4215-F | LF-4215-8F |
| System Models | 3-way: SC-2150 | 2-way: SC-422C | 3-way: SC-423C-8 | 3-way: SC-423C-F | 4-way: SC-424-8F |
| Driver Information | 15" (381 mm) high-efficiency, extended bass woofer, 3" copper voice coil | 15" (381 mm) | 15" (381 mm) | 15" (381 mm) | 15" (381 mm) |
| Impedance | 4Ω | 4Ω | 8Ω | 4Ω | 8Ω |
| Rated Noise Power1 | 500 W RMS3 | 1000 W RMS | 1000 W RMS | 1000 W RMS | 1000 W RMS |
| Sensitivity2 | 100 dB | 99.5 dB | 99.5 dB | 99.5 dB | 99.5 dB |
| Dimensions (HWD) inches | 38.3 x 30 x 14.5 | 35.75 x 30 x 20.25 | 35.75 x 30 x 20.25 | 40 x 31.5 x 19 | 40 x 31.5 x 19 |
| Dimensions (HWD) mm | 972 x 762 x 368 | 908.1 x 762 x 514.4 | 908.1 x 762 x 514.4 | 1016 x 800.1 x 482.6 | 1016 x 800.1 x 482.6 |
1 2 hours of 6 dB crest factor pink noise, AES method.
2 Based on nominal impedance, measured in half space 1 W @ 1 m.
3 AES2-1984, 2 hrs, Power = Vrms2/Znom
LF components connect with barrier strip screw terminals that accept up to #10 AWG stranded wire except for LF-4215-8F, which uses Neutrik Speakon™ NL4.
3 and 4 Driver Models
| Model | LF-4315 | LF-4215 x 2 |
| System Models | 3-way: SC-433C | 3-way: SC-443C |
| Drivers | 3 | 4 |
| Driver Information | 15" (381 mm) | 1 15" (381 mm) |
| Impedance | 5.5Ω | 4Ω |
| Rated Noise Power1 | 1500 W RMS | 2000 W RMS |
| Sensitivity2 | 99.5 dB | 102.5 dB |
| Dimensions (HWD) inches | 53 x 30 x 20.25 | 72 x 30 x 20.25 |
| Dimensions (HWD) mm | 1346 x 762 x 514.4 | 1820 x 762 x 514.4 |
1 2 hours of 6 dB crest factor pink noise, AES method.
2 Based on nominal impedance, measured in half space 1 W @ 1 m.
LF components connect with barrier strip screw terminals that accept up to #10 AWG stranded wire except for LF-4215-8F, which uses Neutrik Speakon™ NL4.