A:AnswerThe AWR-650-SM are designed to be either wired as mono or stereo (see manual). You can either have a pair of them, or just a single and still get the full, left and right signal.
A:AnswerThe AWR-650-SM will have 4 wire connection in case you wanted to wire the speaker stereo instead of the standard mono. There are detailed instructions on the manual on how to connect these speakers the same way you are used to:
https://2d73e25b29782b6d6766-9c8af5cbfef16739445bc76457060528.ssl.cf2.rackcdn.com/RockAWR650SMManualRev2012_635042113508420000.pdf
A:AnswerThe AWR-650-SM is a passive speaker, and will need to be connected to an AV receiver or amplifier in order to be powered. They are recommended at 100W per channel into 8 ohms. It will then be up to the amp or receiver whether it will connect with the echo dot.
