The 21'' direct radiating subwoofer EDGE121SP is a system which complements and completes the bass frequency response of the EDGE212P. Working between 30 and 80 Hz, with incredible excursion control and excellent power handling. Capable of working at 800W (AES) continuous power, it can handle peaks of up to 6dB higher (3200W) without any damage. Thanks to the robust mechanical cone suspension system DSS (Double silicone spider), to the double demodulating rings (DDR) and to the over damped box in which it sits, the EDGE121SP is capable of producing high quantities of energy in the bass frequencies with high definition and control.