The Multi Dot/echo music ability comes with a trade-off... It uses Bluetooth to make the connections between the devices for mutliple device play back... so it requires your "other" dots or whatever, to drop any other Bluetooth connection and connect to the group via bluetooth from my understanding... If you are using a bluetooth speaker it drops the speaker, and becomes the redundant speaker... the only way you can take advantage between dots with external speakers is by physical connection to something like Computer speakers... or some other similar set up that could be hard connected via the little headphone jack sized connector on the dot. Since there is no connector on the echo, it will play through the echo (full size) speaker, which isn't horrible to begin with... but it has no external speaker capability in this case, unless it is the master music device, and is being used through a bluetooth speaker to begin with,,,