System bottleneck?

Streaming through your phone is the bottleneck. Why are you streaming from your phone and NOT the Marantz when it is also  a network player?

Heres the description

A high-resolution source for digital music

The Marantz SACD 30n is a motherlode of high-resolution digital sources in one component. It's a disc player with an innovative transport mechanism and compatibility with standard CDs, homemade discs, and SACDs. It's also a state-of-the-art network player that gives you access to popular streaming apps, internet radio, and Apple AirPlay 2. If you like to stream high-res files from a computer, network attached storage (NAS), or a thumb drive, the built-in Marantz Musical Mastering digital-to-analog converter provides pure and accurate musical detail for those files, too.

Listen to more new(to you) music, learn to appreciate it and stay off audio forums. 

You may be coming down with audio neurosis.

But to be specific I am always looking for better clarity, bigger soundstage and more separation of instruments.

Boy aren't we all. Your system looks good on paper. What about a pair of subs, that will really change things. I'd also would want to see your set-up just to make sure you have it located well. 

artemus_5 
I guess I did not think there would be much of a difference whether I streamed through phone or directly on the marantz. I have not looked into going direct but I will figure out how. I guess I also thought I needed an app to stream from and I’m not sure how the marantz accomplishes that on its own. I need to do some digging. Thanks for the suggestion. 
 

russ69 the signature se’s have pretty good bass response. I would even say excellent. Having said that a pair of subs would probably help the sound above and beyond the extra bass. Thanks for that thought.

Tablejocky No doubt!