Audioengine A5+ Active 2-Way Speakers (Black) Built-in power amplifiers, 50 watt per channel RMS Compatible with any computer (Mac or PC) Custom Kevlar woofers and silk tweeters Improved thermal management Remote control, 1/8" and RCA inputs, USB power, all cables included Type: 2.0 powered (active) bookshelf-style speaker system Power Output: 150W peak power total (50W RMS / 75W peak per channel), AES Inputs: 3.5mm stereo mini-jack, RCA L/R Outputs: RCA variable line-out, USB (power/charge) Input Voltages: 115/240V, 50/60Hz manually switchable Amplifier Type: Dual Class AB monolithic Drivers: 5 Kevlar woofers, 3/4 silk dome tweeters SNR: &gt;95dB (typical A-weighted) Frequency response: 50Hz-22kHz 1.5dB Weight (both speakers): 25 lbs Dimensions:each speaker (HWD)10.75 x 7 x 9