If you only want compliments and not constructive criticism then probably not a good idea to say "any feedback welcome". Some of us take time to listen and offer our thoughts. Hopefully these thoughts aren't stepping on toes of a player who has a distinct idea of the sound and style they are aiming for. In my case the comments were aimed at (what sounds like) an advanced player who is competent.
Your recording set up has nothing to do with using a very limited range on your horn, and what sounds like volume/support falling off when playing lower notes. The microphone can muffle and distort tone slightly, but as Colin and others (who have used extremely basic gear) know, not that much. Once again I don't know what you're aiming for, but your tone is muddy/fuzzy. Embrace it, or change it, no matter to me, but it ain't the microphone.
Your posts are more than welcome, especially since there are few who post in the smooth jazz style and can be an example to some of the less accomplished players who aspire to play in that style. If just sharing I'd suggest a tag to your post like : "hope you enjoy" instead of "any feedback welcome". This site encourages those who wish to grow/improve to come forward and share their efforts in a safe environment where we are all (hopefully) growing with the assistance of others.