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Q I have a 7.1-channel surround system with four dipole surround speakers. My plan is to move the back surround speakers to the ceiling in my home theater and use them for down-firing height speakers in a Dolby Atmos 5.1.2 setup.  The room is 12 x 20 feet with a flat, 8-foot-high ceiling. Will I get a good Atmos experience with this setup? How will it work for DTS:X? —Dan Spaughs

A Here’s a question that has probably been asked and answered a thousand times. I plan to upgrade my system from a 7.1-channel to a 7.1.4 Dolby Atmos configuration. Should I replace my current dipole surround speakers with direct-radiating speakers? Also, which 11.2-channel AV receivers should I consider buying? —Dave Brown / via e-mail

A I’m using a Yamaha AX-497 integrated amplifier to power a pair of Elac speakers with a nominal 4-ohm impedance. I also have a Yamaha YST-SW315 subwoofer I’d like to use in my system. Here’s my question: If the speakers are wired directly to the amp as speaker pair A, and the powered subwoofer is connected as speaker pair B, can I power both simultaneously without damaging the amplifier? (The amplifier’s manual warns against connecting more than one pair of 4-ohm speakers.) For convenience reasons, I would rather not wire the main speakers through the subwoofer. —V.A. Dare / via e-mail

Q I have a 7.1-channel in-ceiling speaker system in my home theater. How can I adapt this for a Dolby Atmos configuration? My plan is to add a standard 5.1 channel speaker system and use the in-ceiling speakers for the height effects.—Paul Wright

Q I am finally upgrading my Pioneer Elite receiver and plan to replace it with a new model that has HDMI 2.2 inputs. Unfortunately, the new receiver that I have in mind lacks a phono input. To get that feature, I’d have to fork over $500 more for a step-up model. Is there any way to use the phono preamp in my old receiver and hook it up to the new one? Also, how good are the built-in phono preamps in receivers compared to standalone models? —Kevin Olds /Via e-mail

Q The Rec. 2020 color gamut is the future of TV—the standard was set years ago and has been included in the specification for Ultra HD Blu-ray. Even so, UHDTVs have been around for a few years yet none can display the Rec. 2020 color gamut. Why? Are we one day going to see Rec. 2020-capable LCD and OLED TVs, or is it true that only laser projectors are capable of reproducing that gamut? —Karim Genio / Algeria, North Africa

Q I would like to know if my current Vizio TV (P502Ui-B1E) and Pioneer receiver (VSX-1130-K) will be able to support both the HDR10 and Dolby Vision HDR formats.  I’d really prefer not to have to upgrade the Pioneer receiver since it was purchased recently to support both 4K@60Hz video and Dolby Atmos audio in my system. I'm also interested in picking up LG’s 65EF9500 OLED, a 2015 model,  but am wondering the same thing about HDR support on that TV.  —Johnston Cheng