Ask S&V

Q What’s the best way to connect a subwoofer used mainly for music listening? I’ve been trying both the stereo RCA and mono LFE input connections on my Klipsch R 120SW subwoofer, but am not sure which works best, and also where I should set the low-pass/LFE filter on my Onkyo TX-NR717 receiver. My front speakers are Klipsch R-28F towers. I would appreciate any recommendations on crossover settings for the receiver and the subwoofer itself. —Ken Zarubi, via email

Q Do the preamp outputs on A/V receivers work as well as those on a standalone preamp-processor? What functionality does one lose when using pre-outs on a receiver? —Ravinder Dhawan, Watchung, NJ

Q My LG V30 smartphone has a high-performance Quad-DAC audio system capable of decoding hi-res files encoded with MQA. I want to use the LG phone as a source to stream Masters-quality music from Tidal via Bluetooth (aptX HD) to my new NAD integrated amplifier. Will this work for MQA, or do I need an external digital-to-analog converter to “unfold” the MQA-encoded files? —Joel Johnson, via email

Q I have over 9,000 songs on a hard drive hooked to my computer. When I listen, I stream it over my home network to a Samsung TV connected to a Denon receiver. The audio is fine but the visual effect of browsing through folders on a 70-inch screen leaves much to be desired. Is there an inexpensive way to browse and play your stored digital music library in a home theater using a visual interface like Microsoft Groove Music? —Jay Sklaroff, via email

Q My new Denon A/V receiver has an eARC (enhanced Audio Return Channel) HDMI connection, and my TV has a regular HDMI ARC connection. Here’s my question: Will the Denon A/V receiver be able to decode both Dolby Atmos/Dolby True HD and DTS:X/DTS-HD Master Audio soundtracks that are routed to it from the TV’s HDMI ARC port, or do I need to connect sources such as an Ultra HD Blu-ray player and streaming box directly to the AVR to make that happen? —Andrew Last, via email

Q I have a Vizio TV, model number D48f-E0. The company’s specs say that it’s a “Full Array LED display.” It also has a “Backlight Control” in its picture settings menu that automatically dims or brightens the backlight during viewing. Is this feature the same thing as local dimming? I’m confused here — if backlight control and local dimming are separate features, what’s the difference between them? —James Paxton, via email

Q My house has a well-lit living room where I watch TV. Are OLED sets bright enough to use in that space, or should I buy an LCD TV instead? —Paul G.