KLH AV1001B Bookshelf Speakers, (Pair) (Discontinued by Manufacturer) KLH 5 1/4"2 Wy. 100W Bookshelf Pr. (Blk) 5 1/4" Dynamic Fiber Woofer & 7/8" Liquid Cooled Dome Tweeter Magnetically shielded 7/8-inch liquid-cooled tweeter 80 to 20,000 Hz frequency response