This one have AUX out connection, allow you to connect to external amplifier to enhance the loudness and sound quality drastically, it is the main reason I bought it.
Sound quality upgrade is limitless. This speaker Highly recommended.
Other smart speakers in the market they dont allow connect to better sounding speakers, user have to bare with bad sound quality, if you play louder, the music gets sharp and distorted, very frustrated experience.
Happy Amazon Echo Dots keeping this AUX connection, hope they can keep it this way for their future generations products.