Energy ESW-V10 Subwoofer (Single, Black) (Discontinued by Manufacturer) Single bass-reflex design subwoofer with front-firing port 10" Woven Composite Fiberglas(TM) Cone Patented Ribbed Elliptical Surround technology Power output: 300 Watts RMS, 1200 Watts Dynamic Frequency Response: 23Hz-120Hz +/- 3dB