Amazon announced four companion products for Echo that make Alexa not only sound better, but work with existing speakers and stereo systems. In addition to the all-new Echo Plus and Echo Dot for 2018, ...

Snell Acoustics introduces an external subwoofer amplifier, the SPA200 , for use with their passive in-wall subwoofers.The SPA-200 is a 19-inch rack mountable amplifier to match up with Snell's ...

All, I posted this at DIYMA, and didn't get too may helpful responses, so figured I'd ask the Hive Mind. Back in the '90s, I used to set amp gains by turning the level pot all the way up and then ...