HK Audio E110SUBA Elements Active Subwoofer/Base Active subwoofer module with 600 watts power output; remarkably compact and powerful 10-Inch High-performance speaker driven by 250 Watts 300 Watts to drive up to two E 435 Mid/High units or an E110 Sub passive subwoofer Two E-Connect coupler with an integrated bus; XLR in/out; Speak on Parallel out Exceedingly light weight (41.9 lbs.)