Subwoofers

Lowest of the Lows

QSC design innovations aren’t limited to our screen channel loudspeakers.  We also offer industry-leading subwoofers and surround loudspeakers:


DCS subwoofers are available in a variety of single and dual 18-inch driver enclosures.

When 18-inch woofers aren’t quite enough, QSC has the ultra bottom-end covered with the awe-inspiring 21-inch SB-15121.

QSC Subwoofers bring earth-shaking realism to the cinema experience, driving home the impact of explosive soundtrack action. Our high quality MDF and plywood subwoofer enclosures feature large, fully radiused and flared ports that smooth airflow at high levels to minimize noise from port turbulence. Symmetrical spacing of ports relative to drivers creates uniform internal pressure to prevent distortion and damage.

In dual-driver systems, the box is completely divided into single-woofer chambers for greater strength and rigidity, allowing each driver to function normally in the rare event that the other fails. With both single- and dual-driver models to choose from, our subwoofers excel at clean, punchy lows, delivering excitement you can feel to every seat.

SELECT A MODEL

  SB-1180 SB-5118 SB-7118 SB-15121 GP118-sw
System Type 18"
subwoofer
18"
subwoofer
18"
subwoofer
21" subwoofer 18" subwoofer
Frequency Rangeat -10 dB (Hz) 1 29 Hz - 170 Hz 24 Hz - 100 Hz 22 Hz - 100 Hz 23.8 Hz - 100 Hz 29Hz – 800Hz
Peak Output2 125 dB 123 dB 125 dB 137 dB 135 dB
Nominal Impedance
Rated Noise Power3 550 W RMS 500 W RMS 750 W RMS 2500 W RMS 1700 W RMS
Sensitivity4 98 dB 96.5 dB 98 dB 99 dB 98 dB
Driver Information 18" (457 mm) 550 W high-efficiency
subwoofer featuring
4" (100 mm) copper
voice coil
18" (457 mm) 500 W high-efficiency
subwoofer transducer
featuring 4"
(100 mm) copper
voice coil
18" (457 mm) 700 W high-efficiency
subwoofer transducer
featuring 4" (100 mm)
copper voice coil
21" (533 mm)
high efficiency
subwoofer transducer
featuring a vented
6" (153 mm) copper
voice coil on
a fiberglass former.
18" subwoofer with a 4" Voicecoil
Dimensions (HWD) inches 35.9 x 30 x 11.7 35.75 x 30 x 20.3 35.75 x 30 x 20.3 48.8 x 30 x 24 20.9 x 25.8 x 30.4
Dimensions (HWD) mm 912 x 762 x 297 908.1 x 762 x 516 908.1 x 762 x 516 1238 x 762 x 610 531 x 656 x 772
Weight 97 lb / 43.5 kg 160 lb / 72.4 kg 162 lb / 73.3 kg 231 lb / 105 kg 111 lb / 50.3 kg
  Details Details Details Details Details

1 All frequency ranges specified refer to measured response (half space, 2 pi).
2 Calculated SPL at 1m, (half space, 2 pi), speaker operating at rated RMS power with pink noise within specified frequency range.
3
2 hours of 6 dB crest factor pink noise, AES method.
4 1 watt /1 meter, half space.
5 Preliminary

 



All models connect with Barrier strip screw terminals that accept up to #10 AWG stranded wire.

All specifications are subject to change without notice.

  SB-5218 SB-2180 SB-7218 GP218-sw
System Type 2 x 18" subwoofer 2 x 18" subwoofer 2 x 18" subwoofer 2 x 18" subwoofer
Frequency Range at -10 dB (Hz) 1 24 Hz - 100 Hz 25 Hz - 150 Hz 22 Hz - 100 Hz 27.4 Hz - 1.2 kHz
Peak Output2 135 dB 136 dB5 137 dB 140.5 dB
Nominal Impedance 4Ω 
Rated Noise Power3 1000 W RMS 1100 W RMS 1500 W RMS 1700 W RMS
Sensitivity4 99.5 dB 100 dB5 101 dB 101.5 dB
Driver Information Two 18" (457 mm)
500 W high-efficiency
subwoofer transducers
featuring 4" (100 mm) copper coils
Two 18" (457 mm)
550 W high-efficiency
 subwoofers featuring 4" (100 mm) copper voice coils
Two 18" (457 mm)
700 W high-efficiency
subwoofer transducers
featuring 4" (100 mm)
copper coils
18" subwoofer
with a 4" voice coil, ceramic magnet assembly
Dimensions (HWD) inches 30 x 48 x 24 33.15 x 42.5 x 16.5 30 x 48 x 24 20 x 47.17 x 30
Dimensions (HWD) mm 762 x 1220 x 610 842 x 1080 x 420 762 x 1220 x 610 508 x 1198 x 762
Weight 205 lb / 93 kg 187 lb / 85 kg 210 lb / 95 kg 191 lbs / 86.6 kg
  Details Details  Details Details

 

1 All frequency ranges specified refer to measured response (half space, 2 pi).
2 Calculated SPL at 1m, (half space, 2 pi), speaker operating at rated RMS power with pink noise within specified frequency range.
3
2 hours of 6 dB crest factor pink noise, AES method.
4 1 watt /1 meter, half space.
5 Preliminary

All models connect with Barrier strip screw terminals that accept up to #10 AWG stranded wire.

All specifications are subject to change without notice.