System bottleneck?

Ok. What I am doing is streaming internet to phone and then using Airplay 2 to connect to marantz. Another  thing I do is play mp3 files from a flash drive connected to marantz. I also play hd radio through marantz. I do not use a computer or have a server on my home network. I could use my laptop in that way but when I did I did not think it sounded as good as streaming through my phone. My marantz recognizes my home network but I only use it in the sense that my phone communicates with the marantz to play my playlists which are not downloaded to my phone. Does that make sense to anyone because I’m not sure it does to me. 

russ69 the signature se’s have pretty good bass response.

Actually, I'd recommend a set of woofer towers (or vertical sub array). You would have a near Infinity type RS1B at that point. Very powerful, and miles of depth. 

Thanks russ69. I also wanted to mention that I use the HEOS app on my phone to run streaming services like tidal, etc. It seems the sound quality is very much like playing the phone app for tidal. Should there be a difference?

How does your flash drive music sound when compared to streaming from your iphone?

It seems to me streaming over iPhone is marginally better. Not a huge difference just a bit more resolution and soundstage. I attribute that to better files being played over streaming compared to mp3s…?