Bentley Acoustics FR-100 - This is a top level bookshelf speaker with a 2-way, two driver design and packs a punch of solid detailed bass as low as 55hz accompanied by clean balanced vocals and crystal clear highs. System Type : 2-way Vented bass reflex design Power Handling: 20-120W - Impedance: 6 Ohm Frequency Response: 55hz - 25Khz - Sensitivity: 89db Driver Configuration : 1 x 5" Aluminium Magnesium M5N Midrange/Midbass Woofer 1 x 1" Silk Dome Tweeter Weight: 5.5kg Nett - Dimensions: 180 x 320 x 260