Cerwin Vega CVA121 Powered PA Subwoofer The CVA-121 is a flagship 21-inch active subwoofer with tremendous power output and exceptional low-frequency response. The custom designed 21-inch driver uses the legendary Cerwin-Vega Stroker three spider technology for maximum cone excursion and voice-coil efficiency. The CVA-121 features built-in amplification for a fully integrated solution with an authoritative 1200 watts of continuous output and 2400 watt peaks. A unique and striking cast aluminum grille doubles as a heat-sink to minimize power compression and optimizing driver performance. The CVA-121 is constructed of hardwood with the option of a Coolex polyurethane paint or high-grade black carpet finish, in a compact enclosure design that has the footprint of a standard 18-inch subwoofer. This high-performance active sub features XLR and 1/4” TRS connectors, Master/Slave output connectors for daisy-chaining multiple CVA subwoofers using a single signal, and a versatile onboard parametric equalizer that allows for the adjustment of the gain, frequency, and Q for perfecting your bass performance. A top-mounted 35 mm pole socket accommodates a satellite speaker for full range performance, and removable casters add to the sub’s portability. Features & Specifications 21” driver in 18” cabinet footprintVersatile Onboard Parametric Equalizer4-Position High Pass FilterSweepable Low Pass FilterScalable with multiple subs using Master/ Slave OutputCast Aluminum Grille (which dissipates heat from driver)Multiple top-mount 35 mm Pole SocketFrequency Response: 35 Hz - 135 Hz (±3 dB)Power: 1200 watts RMS/2400 watts peakFrequency Range: 32 Hz - 135 Hz (-10 dB)Max SPL: 135 dBWeight: 180 lbs.Dimensions: 31.75" x 23.5" x 23.5"