RSH + Sonos Amp Together turning your home entertainment up a notch. If you are installing a multi-zone Sonos Amp system in an enclosure, you need the new purpose-built RSH shelf. The RSHA-SONOS-AMP2 shelf was designed in partnership with Sonos to provide you with the ultimate mounting solution. It comes equipped with shelf mounted lacing bars for cable management, clamping bars to secure your Sonos Amps and an anodized faceplate, all in a single part #. This RSH shelf has our patented unique "face-after" design, meaning you can assemble tool-free, install up to two Sonos Amps and pop on the faceplate after its rack mounted.