The R-41M bookshelf speakers offer maximum versatility without sacrificing performance from a small, yet elegant audio solution. Designed as main speakers for a compact living space or surround sound to support a Reference speaker system, the R-41M bookshelf speakers are the ideal choice for your home theater system. Features: 1" Aluminum LTS tweeters. 90x90 Square Tractrix Horns. 4" Spun-Copper IMG Woofers. Bass-Reflex via Rear-Firing Port. Strong, Flexible Removable Magnetic Grille. Dimensions: 11.3" x 5.75" x 7.9".