Question 1

Which is better, Sonos Era 300 or Marshall Stanmore III?

Accepted Answer

Both products scored 8.5/10 in our testing — it's a tie. Choose based on which features matter most to you.

Question 2

Is the Sonos Era 300 worth it over the Marshall Stanmore III?

Accepted Answer

The Sonos Era 300 scores 8.5/10 while the Marshall Stanmore III scores 8.5/10. The Sonos Era 300 is our "Best Overall" pick in the Best Essential Bluetooth Speakers for Big Rooms 2026 category.

Sonos Era 300 vs Marshall Stanmore III: Which to Buy?