This is the KS Series User Manual, which details the features and operation of the KS112-2000 watt Active Subwoofer, KS118-3600 watt Active Subwoofer, and KS212C-3600 watt Active Cardioid Subwoofer.
This manual provides safety instructions, installation guidelines, and operational details for QSC’s KS112 (2000W), KS118 (3600W), and KS212C (3600W cardioid) active subwoofers. It includes warnings for moisture, electrical safety, and proper mounting. The KS212C features cardioid radiation for directional sound, while the KS118 offers high output with rear rejection. Installation must follow safety and load-rating guidelines, and stacking is limited to two units for optimal rear attenuation.
| Power Output | KS112: 2000W, KS118: 3600W, KS212C: 3600W |
|---|---|
| Lifespan | 10 years |
| Storage Temperature | -20° C to +70° C |
| Relative Humidity | 5 - 85% RH |
The KS212C is a 3600-watt active cardioid subwoofer powered by a dual 1800-watt Class D amplifier.
The KS212C provides 15 dB front-to-rear attenuation at 70 Hz.
Yes, up to two units can be stacked horizontally, but stacking more reduces rear attenuation.