Thanks to a built-in amplifier specifically designed for these high-performance speakers, the Sixes monitors deliver room-filling sound without taking up much space, maximizing both performance and sound quality. It's finally time to completely forget about the costs, clutter, and hassle of an external AV receiver. The Sixes feature individual low-noise amplifiers that are specially designed to maximize system performance and eliminate the need for external amplification. This means that world-class Klipsch engineers have full control over the signal path. The components are carefully selected and tuned to fit together perfectly, resulting in an incredibly immersive and complete sound. Whether connecting to a turntable, television, computer, or smartphone, the Sixes-powered monitors provide the solution. The Sixes come equipped with a built-in phono preamp, wireless Bluetooth technology, digital optical, analog RCA, and USB inputs, allowing you to enjoy the superior stereo sound of a beautifully designed tabletop stereo system. The Klipsch Heritage Wireless series of powered audio systems, featuring luxurious materials like real wood veneer and tactile spun copper switches and knobs, combines the acoustics and classic design of Paul W. Klipsch with the latest technologies available today.