A Bluetooth speaker that sounds really great?

It does have heavy bass presence but the mid / vocal sounds a bit veiled.  might be the recording though.  Feedback is good.  You could pair two into a stereo for $1,200 (like new) now on Amazon.  https://www.youtube.com/watch?v=pXfVFkccaF4

a couple of people mentioned Marshall. I agree 

Soundcore Motion X600. Great for background music and has a good control App.

Outdoor listening requirements should not be that complicated.  You can’t really get high quality nuanced sound without wall and ceiling reflections, and then there is the issue of competing noise, both in urban and non urban environments .  I use a Sony Bluetooth brick when I am on my deck or in the garage and I love it.

  In your man cave/shed or your vehicle the environment is more controlled and I would consider having dedicated but inexpensive systems.

I have an original House of Marley BT speaker that's been great for 9 years. The BT works well and it plays quite loud with a fair bit of bass. It'll fill a room or a patio. I just checked Amazon and there's a couple of new models/updates available. It works so well I use it for the sound system during our outdoor movie nights!

Others have mentioned Sonos which I agree is an excellent performer. A good friend of mine has some in his home and they sound great both indoors and out. We've stayed at a couple of AirBnB's that have had them. It was really nice to ply our own music. I'll likely get a set up for our next home so my wife can listen to her music without needing to wait for me the fire up my stereo. 

Happy listening.