https://www.theguardian.com/technology/2020/dec/07/amazon-echo-2020-review-the-best-sounding-smart-speaker-under-100 > Thumping bass, great sound and new spherical design propels Amazon to top of the pile > Amazon’s fourth-generation Echo Alexa smart speaker is a complete redesign in form and audio, with the popular device transformed into a ball of sound.