It seems your avr is due for an upgrade IMO. Get newer audio codecs that way, too. Maybe a bluray player too !

What's all the gear you have now particularly in terms of make/model?
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All old stuff, basically just the marantz receiver sr5200, and a 6.1 newton series cambridge soundworks surround speaker system. P500 dual 8”drivers sub (not functioning),2 floor speakers, center channel, surrounds, and a matching rear channel. Epson home cinema 2150. That’s really it. Oh, i have a pair of older JBL reference monitors (idr model atm) also and a pair of yamaha msr-100 monitors. Pair of technics mk5 turntables and an old gemini 4 channel mixer. That’s it, nothing fancy.