Speakers powered by smart assistants are becoming dime-a-dozen commodities. In most cases, a smart speaker is good for voice commands, but I haven't found their musical reproduction particularly satisfying. The Riva Concert is part of Riva Audio's new Voice line of smart speakers that also includes the larger Riva Stadium. This sweet-sounding portable speaker is built to satisfy music lovers, with refined high-tech features you don't often see in smart speakers. Unpacking the Riva, I noted its heavy, solid build. Under the hood, you'll find a 50-watt Class D amplifier powering the three active drivers and three passive radiators.