The RA-1570 combines proven analogue design with the most musical digital circuits to bring all of your sources to life with amazing fidelity. The amplifier provides a front panel USB input, making it easy to connect a wide variety of music storage devices including iPods®, iPhones®, and iPads® and the supplied Bluetooth dongle. Supported formats include MP3, WAV, and WMA files for maximum flexibility. Meanwhile a custom-designed transformer keeps the audio signal pure and uncorrupted, while the robust continuous output of 120 Watts per channel provides all the power and presence you need. The Class AB output stage uses discrete devices to ensure precise reproduction of all signals with virtually any loudspeaker.