Energy 5.1 Surround Sound Cinema Quality Speakers featuring 2 XL-250 Floor Standing Tower speakers (200w) with dual 5.5" woofers, single tweeter (review: http://www.audioreview.com/product/speakers/floorstanding-speakers/energy-speaker-systems/xl-250.html ), 2 Rear Channel e:Xl Series (single woofer, single tweeter) - wall mountable (bookshelf), 1 Center Channel EXL C 100w (4 woofers, 1 tweeter) and 1 subwoofer EXL-S10 100 Watt (Discrete Mosfet Amplifier) https://www.cnet.com/products/energy-e-xl-s10/specs/