The Pyle PADRI3 is actually an analog-to-digital converter. It also functions as a headphone amplifier with volume control. It takes a set of stereo RCA inputs from an analog source, like your turntable and converts those waveforms to a digital signal, which is transferred to your computer via an included USB cable. The included software, Audacity, allows you to record this music and save it as an MP3, WAV, or other file format for archiving. Or, you can transfer this to your iPod or other MP3 player and listen to your favorite vinyl hits with all of the conveniences that modern technology has to offer. No preamp necessary - just plug right in.