LF Components


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
3-way: SC-413C
4-way: SC-414

Driver Information

15" (381 mm)
high-efficiency,
extended bass woofer,
3" copper voice coil

15" (381 mm)
high-efficiency,
extended bass woofer,
4" copper voice coil

Impedance
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-3215 LF-4215 LF-4215-8 LF-4215-F LF-4215-8F
System Models

3-way: SC-2150

2-way: SC-322XC
2-way: SC-322C
3-way: SC-323C
4-way: SC-324

2-way: SC-422C
3-way: SC-423C
4-way: SC-424

3-way: SC-423C-8
4-way: SC-424-8

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)
high-efficiency,
extended bass woofer,
3" copper voice coil

15" (381 mm)
high-efficiency,
extended bass
woofer,
4" copper voice coil

15" (381 mm)
high-efficiency,
extended bass
woofer,
4" copper voice coil

15" (381 mm)
high-efficiency,
extended bass
woofer,
4" copper voice coil

15" (381 mm)
high-efficiency,
extended bass
woofer,
4" copper voice coil

Impedance 4Ω 
Rated Noise Power1  500 W RMS3 800 W RMS 1000 W RMS 1000 W RMS 1000 W RMS 1000 W RMS
Sensitivity2 100 dB 98.5 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 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 514.4 908.1 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
4-way: SC-434

3-way: SC-443C
4-way: SC-444

Drivers 3

4

Driver Information

15" (381 mm)
high-efficiency,
extended bass woofer,
4" copper voice coil

1

15" (381 mm)
high-efficiency,
extended bass woofer,
4" copper voice coil

Impedance 5.5Ω
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.