how to set up good home theater sound (and picture)


I am very new to the latest home theater formats. I have a new 4k TV but I don't yet have any devices that will stream 4K. My fios box does TV and I do netflix, amazon, and disney through our PS4. I just got a Marantz AV 7702 processor. I used to run Theta digital equipment for DVDs but no one buys disc players anymore, right (even 4k disc players)? Oppo seems to have gone out of business. Is the new PS5 an audiophile quality player? Will a new FIOS box satisfy? I'm wondering why I even have a good processor but I definitely miss good quality sound for movies. It's only OK running the current equipment into the Marantz and nowhere near what I remember from a Theta DVD player and my old Sunfire processor. It should be much better with the new sound formats. One option for video would be to run the apps directly from the TV, which would optimize video, but then I'm running an HDMI cable from the TV to the Marantz, and I assume that would be poor sound quality? How do you get audiophile quality movie sound these days? Thanks all.
dbw1
Another thing.  Putting linear power supplies on your FIOS One and/or Roku type streamer will significantly improve the audio/video quality of these devices.  However, none of these streaming devices are going to hit the same audio/video quality of a bluray/4K disc.  Even though your streaming services will deliver 4K content, the video data is going to be more compressed.  The audio streams are still going to be old school compressed Dolby Digital or Dolby Digital Plus.
Interesting. So, the only way to get the HD audio formats is to buy a disc player? Is the PS5 a good enough player? I wonder if I should look at a different player than that. With Oppo gone, what do people buy now?
The key to a good home theater is acoustics, all rooms do a bad job without help.
Absorb at first reflection points, reduce flutter echo with diffusers on parallel walls, load your corners with SuperChunk bass absorbers.
Decay times and phase at xo points are next, ringing isnt just high frequencies, bass notes ring too.
get some software and a decent mic to test. I have been building theaters in houses since 1987, mid level gear in a well tuned room will easily create a directors vision. Super high price gear in an untreated room is plain foolish.
go read on what goes into control room recording studio design, ur head will spin :0) in a good way!

untreated rooms are a blur of reflections, and echos, intelligiblity is so bad no matter what the volume is you cant understand dialog.

Read, read, read, GearSlutz is a great ProAudio site, look up the recording studio area, controlrooms and most of all, Acoustic treatments.

https://www.gearslutz.com/board/studio-building-acoustics/

Most of all enjoi this great hobby, i have been entertaining people in my theaters for 30+ years, its a great way to bring people together, but not til we get a vaccine!



The PS5 is also an internal switching power supply.  I don't know how good it is for disc playback.  Most bluray players nowadays are also switching power supply (so is Oppo).  You could try to get an Oppo 203 and then upgrade the power supply to linear (from oppomod website).

Or buy a Panasonic DP-UB9000 for $1,000 and then get the Oppomod upgrade for another $1,000.  That's a $2k investment, but I think that's as good as it gets for bluray players.

Though, most people will not go to this level and would be happy with a $200 disc player.