The QSC SB-15121 is a premium 21-inch cinema subwoofer from QSC's DCS (Digital Cinema Sound) reference range, built for high-output, deep low-frequency reproduction in premium and large auditoriums. It uses a 1500-watt, 21-inch transducer to move large volumes of air for impactful LFE with low distortion. As a passive cinema subwoofer it is powered and processed by external QSC cinema amplification/DSP. This is a standalone subwoofer, not an accessory. (Note: this model has been listed as end-of-life by some retailers.)
Key Features
- Premium 21-inch DCS cinema subwoofer
- 1500 W, 21-inch transducer for deep, high-output bass
- Designed for premium and large-format auditoriums
- Passive; driven by external cinema amplification/DSP
- Part of QSC's reference cinema subwoofer line