Radius 90 Bookshelf Speakers (Pair) Special Order For ultra-discreet sound all around the home, or partnered with the Radius 380 sub for explosive stereo, the original hi-fi mini monitor continues to evolve, incorporating a 4" C-CAM bass driver and 1" C-CAM tweeter. Radius stands available ($389.99 - Pair) Frequency Response 80 Hz - 35 kHz Sensitivity (1W @ 1M) 83 dB Nominal Impedence 8 Ohms Maximum SPL 102 dBA Power Handling (RMS) 100 W Recommended Amplifier Requirements 30 - 100 W Bass Alignment Bass Reflex - Rear Ported Drive Unit Complement 1x 4" C-CAM Cone Mid-Bass Driver1x 1" C-CAM Gold Dome Tweeter Cabinet Dimensions HxWxD 7 13/16" x 4 15/16" x 5 1/2" (198mm x 125mm x 140mm) Cabinet Dimensions (Including Grille and Terminals) HxWxD 7 13/16" x 4 15/16" x 6 7/16" (198mm x 125mm x 164mm) Cabinet Dimensions (Including Grille and Bracket) HxWxD 7 13/16" x 4 15/16" x 8" (198mm x 125mm x 203mm) Weight (each) 4lb 10oz (2.1kg) Sold As Single Unit