I recently purchased the Behringer KT108 and I can safely say that I am greatly pleased with the overall performance and quality of this keyboard amplifier. It features a 15 watt 8" Bugera cone speaker and is driven by 20 watts of power. With two instrument inputs (instrument 1, instrument 2) you can hook up two instruments to play at once, as well as a CD player input and a headphone input, so you are able to play late at night without having to worry about disturbing others. Made specifically for keyboard pianos, this amplifier allows for you to adjust the volume ranges for the "Low", "Mid", and "High" ranges on your keyboard, as well as volume control for each instrument input (vol. 1-10). What is special about this amplifier is that it uses Virtual Tube Circuitry (VTC) technology allowing for true tube-like sound and deep bass without distortion, using a 3 band Equalizer. For whatever reason, it does not come equipped with a 1/4" cable cord, therefore it must be purchase elsewhere, for only a few bucks. I am using this amp with my Casio WK200 keyboard and it sounds amazing. It can be heard from outside at only half volume. For $75, this Behringer amplifier is truly amazing, and offers amazing high quality sound and performance.