“Sound is subjective, but I found the Audioengine neutral with a solid low end. Range was good. Audioengine specifies 100 feet, and no matter where I moved in the house the signal stayed solid. The unit itself is noiseless, and with my ear up to the speaker with no input I could not hear any hum or hiss. The Audioengine bettered all the little Bluetooth speakers I have traveled with, and while my Bose Soundlink Bluetooth speaker sounds very good, I thought the AudioEngine bested it, but for a third more dollars. I listened to classical strings, some Miles Davis and the new soundtrack to the Interstellar movie which has some deep organ notes. Everything sounded clean and pleasant. The speaker doesn’t have really extended highs, but generally most small speakers don’t. The bass held up very well without getting muddy.” —— engadget.com