ALESIS BI-AMPED ACTIVE REFERENCE STUDIO MONITOR6.5 woofer cone formulated from non-woven carbon fiber1 tweeter dome made of pure silk, offers a natural response that aids in preventing ear fatigue Frequency Response: 45Hz-22kHzInternal pole piece mounted phasing plug Ferro fluid cooled to maintain the best balance of transient response to power hand ling Two audiophile-quality amplifiers: 75 watt woofer amp and 25 watt tweeter amp Special time alignment circuitry allows the output of frequencies from the high and low drivers to occur in perfect synchronization Attractive mirror-imaged, charcoal- toned cabinet and magnetically-shielded drivers allow for placement in close proximity with computer or video monitors Horizontal or vertical mounting options