Selling a nice pair of Boston Acoustics HD-9 Bookshelf Speakers, Audition before purchase. info below, actual pics to follow: Driver Complement 8" passive radiator; 6 1/2" woofer; 1" dome tweeter Nominal Impedance 8 ohms Recommended Power 100 w/channel Efficiency 90 dB Dimensions 21" x 11 1/4" x 8 1/2" Weight 20 lbs. Manufactured 1989-94