The auna AV2-CD508BT is a 4-zone stereo amplifier in a retro design, which delivers with 8 x 50 W RMS power. The connection options of the 4-zone amplifier are based on home HiFi standards. Thanks to the integrated Bluetooth interface, smartphones, tablet PCs and computers can be wirelessly integrated into the audio system. On the back side, the stereo amplifier provides three AUX inputs for radio receivers, cassette decks, CD players and other equipment. Incoming signals are passed to other devices via the audio output. In addition, there is a USB port on the front side with which MP3 and WMA files can be played back. All functions can be easily controlled via a remote control. In addition to the separate volume controls for the respective zones, the treble and bass can be adapted to user preferences.