Got my two Dot 3's paired for stereo, and wow what great sound! I have them placed in the opposite back corners of my office desk about 1 meter apart. They are plenty loud at volume 3, even a bit too loud for background listening at 3 as 2 is better. They start to vibrate the desk around volume 4 and volume 5 is about as loud as I can tolerate if sitting at the desk. So plenty of volume!
I adjusted the Equalizer to improve the sound for my tastes. To adjust the Equalizer for a paired set of Echos do the following:
- Open Alexa app, select Devices icon in bottom-right of screen.
- In Devices screen, select Echo & Alexa icon in top-left of screen.
- In the Echo & Alexa screen, select one of the Echo devices in the set. (Don't select the Sub if it is paired.)
- In the Device Settings screen, select Audio Controls (listed in the General section).
- In the Audio Controls screen, make your adjustments.
The adjustments made to either Echo in the paired set will be applied to both Echos. I'm not sure about the Sub as I don't have one of those.