Al Griffin

Q I own a Pioneer Elite VSX-49TXi receiver that I’m using in a bedroom system because it lacks HDMI connections. My plan is to upgrade the Onkyo receiver in my theater room with a Marantz pre-pro plus a power amp. Here’s my question: Could I use the Pioneer receiver purely as a power amp connected to the Marantz pre-pro? —Rick Jennings, Hollister, CA

Q Will I damage a stereo amplifier by using it to amplify only one channel—in this case, my system’s center speaker?—Richard Regan

Q Help! Perhaps it's the case that I don't understand the Dolby Atmos specifications, but I get the impression that if I build an Atmos system with four height channels, I will also need to purchase an expensive receiver.

I want the unit I buy to handle both two-channel analog music and big-budget films with multichannel soundtracks. Is there such thing as a receiver that can process Dolby Atmos soundtracks for a 5.1.4-channel speaker layout but also let me use a high-end stereo amp to power the front channels? —Joshua Gonzalez, Houston, TX

Q Are different wireless speakers compatible with each other? I own several Sonos speakers, but have recently noticed more top-line speaker makers (e.g., Definitive Technology, Polk) starting to distribute their own. As I continue expanding my wireless hook-ups, I’m wondering if I'm locked-in to using just Sonos? —Stephen Romanelli