Al Griffin

Q Are there any AV receivers available that provide crossover frequencies assignable by speaker type in a surround sound system? Say, 60 Hz for the fronts, 80 Hz for the center, and 100 Hz for the rears? —Jason BF

Q I just bought a Roku 2 streaming box that only has one output type: HDMI. My Adcom preamp-processor lacks HDMI switching, however, so I am forced to connect the Roku to an HDMI input on my Samsung TV and use its optical digital output to route audio signals to the Adcom. My problem is that the Samsung TV only passes two-channel audio through its digital audio output. Is there a reasonably priced device that can separate 5.1 digital audio from the HDMI signal, or am I stuck forever with two-channel sound? —Joe Simone

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 hope you can help me. I am old school: born in the early 60s, rocked out in the 1970s.  I had a nice JVC stereo receiver that I bought in 1985, but it died after a couple of resistors got fried. What can I buy to replace it?  I would like to play my vinyl records so I need a phono input. I also have a nice Onkyo Cassette Tape deck and a Technics Compact Disc player I want to use (both with the old red and white jacks).  Plus I have four speakers that use copper wire to clip to the back of the receiver. Major volume potential is a requirement as I need to crank my 1970s rock! I don’t want to break the bank doing it, either. —Scott Wellington, Marietta, GA