A:AnswerI would think so. It has many options for sound output including: digital optical, HDMI, RCA, and headphone jack. I'm not familiar with your speaker, but if it's powered, it should work.
A:AnswerIf your Dish remote supports Insignia, it’ll work with the code or code search without a problem.
If you ensure HD-Cec is on for your TV, and your TV is accurately registered with your Prime account, you should only have to say “Alexa, turn the TV off” and it should turn on or off.
A:AnswerDo you have it where you can use Netflix and Amazon prime on a 2 tv order? Some only allow to be used on 1 TV . Not sure if this is the problem but worth a see just in case