I'm looking to upgrade my entertainment system and I'm a complete amateur to HiFi. Not looking for anything really fancy. Currently I have a Sony STR-DE595 receiver and JVC SP-UX7000 speakers (all thrifted). I have an LG C1 for a TV, a PS5, an Apple TV, and a Belkin SoundForm Connect to enable Airplay to the receiver.

My first question is regarding what the 60Hz on my receiver means. I'm getting that it means the range of audio frequencies that the receiver can produce, but to what extent is 120Hz better than 60Hz? I also assume that the speakers would need to be able to produce the higher range as well to take advantage of a 120Hz receiver. The speakers I'm looking at look like they support 50Hz. Basically I'm trying to determine if I should be looking to upgrade my receiver as well as speakers.

For speakers- my budget would ideally be <$500 for a pair. I get a discount from Audioengine and I'm looking at the HDP6 speakers for a price of $319. Are these good speakers at this price? Should I be looking at anything else?

All 5 of my 2nd gen Airport Expresses have been working fine. Try pushing a paper clip into the reset switch while plugging the Airport Express to reset it to factory settings. I have to do this rarely on mine. Also interested to try this Belkin adapter Seems like the closest thing to an Airport Express that exists now. Blows my mind that Apple doesn’t make something like the Airport Express or the Amazon Echo Input. AirPlay is the best multi room system out there, and more people who want to use the speakers they already own need to experience it.