Crackle and Pop Sonos doesn't care

Have you called Sonos Support directly to discuss it? The only information you’ll find in this forum is users trying to help other users, Supoort doesn’t frequent this space. And they have access to read a system diagnostic if you submit it, which normally would contain all sorts of hard information the rest of us don’t have access to. 

It sounds more like a bad Wifi connection.
When you say you've tried everything, what is everything?

How are your speakers connected and how strong is the connection?
Are your App and speakers updated?

I love my Era 300, have absolutely no issues and the sound is fantastic, both with music, TV and movies. (Mine is set up as surround though.)

My setup is connected to the 5Ghz network and has a strong connection.

I don't know what you're referring to when you say "I have seen posted but from what I'm reading here Sonos doesn't really care that the Era300 is crap."

What does Best Buy say? As you bought from them any grievance should be directed to them. 
 

My Era 300 stereo pair doesn’t crack or pop; it sounds like you might have a faulty item. Or the power cord is loose and intermittently disconnecting. 

I've contacted Sonos and they at first said after testing and trying to reset it remotely that it is a faulty speaker and they would replace it. Then there was some discussion in their office about a prior RO issued and they said they would get back to me. I haven't heard back from them after 5 days. What I suspect is that Best Buy knew it was bad but sold it to me as new. I'm beyond the BB return timeline because I didn't purchase their "membership" that would have extended the return period. A warranty claim is my only option and the ball is in Sonos court.

Ventura-

i have been told the popping sound in some 300 lots is a known issue. I might suggest talking to level 2 tech, especially if it’s under warranty.