A:AnswerThe Soundbar 300 can be connected to a TV via a HDMI or optical cable. Any audio input to a TV, such as that from a Fire TV, can then be output to, and played via, the soundbar.
A:AnswerAll things equal (add ons and room set up) the 700 is superior as a main AV Theatre system. The 300 is a great system, especially if you have limited space and a smaller budget.