Need Recommendation All-in-One Bluetooth Speakers for Patio

I'm not new to high end speaker industry but this, a portable All-in-One Bluetooth speaker, is so new to me that I know nothing about..
Please help pointing to couple brands, models that can produce HIGHEST sound quality in a low to mid volume level- not noticeable to the neighbors. Refer small to mid size, and it needs capable to be controlled from my iPhone.
Shaded patio, size 20' x 13'. It won't be exposed to direct sun or rain. TIA