Connect your favorite passive speakers to your Sonos ecosystem with the Sonos Amp 2.1-Channel 250W Power Amplifier. It connects to a pair of stereo speakers and a subwoofer, delivering up to 125W per channel thanks to its Class-D amplifiers. It connects to your home network via Ethernet or 802.11b/g/n Wi-Fi, to an audio source via RCA, and to your compatible display via HDMI ARC. The Amp can be controlled via the Sonos app, which is required for setup.