Add multi-room audio functionality to your speakers with the Denon HEOS Amp Series 2 Wireless Amplifier. This amplifier connects to a pair of stereo speakers and a subwoofer, delivering up to 70W per channel thanks to its Class-D amp and is capable of driving speakers rated down to 4 Ohms. It connects to your home network via Ethernet and 802.11ac Wi-Fi, mobile devices via Bluetooth and a 3.5mm stereo jack, digital sources via optical, and legacy devices via RCA. A USB port lets you connect a thumb drive or charge your mobile device. The Amp is controlled via a free app for Android and iOS or via the volume and mute controls on the side panel. The app also lets you play tracks from your smartphone or streaming sources with high-resolution audio support. The HEOS Amp can also be voice-controlled via your Amazon Alexa, Google Assistant, Siri, or Josh.ai ecosystem.