This is the best-sounding portable Alexa-enabled speaker Reviews

While it's expensive and could use a few more features, UE's Blast speaker sounds great for a portable Alexa-enabled speaker.

The UE MegaBlast is a portable, fully waterproof Wi-Fi and Bluetooth speaker that has Amazon's Alexa voice assistant built in. It sounds very good for its compact size, is durable and offers strong battery life.

Somewhat expensive; speakers can't be linked; no Alexa voice support for Spotify playback (can only stream Spotify via Bluetooth); USB charging port is a little bit of a pain to access, making the optional charging base more of a must-have accessory...

While it's expensive and still a work in progress, UE's Megablast speaker is the best-sounding portable Alexa-enabled speaker out there right now.