Looks like there aren't enough negative mentions yet.
These speakers are powered and they sounds incredible. The unit is easy to connect via Bluetooth and is easy to take in and out of the boat to be used anywhere. Only thing is it only has a 120 volt plug but if you get an adapter you can plug it in inside. I use a marine battery and a box that has a 120 volt plug to make this portable. LOTS OF POWER and it is very clean sounding
I would recommend this to a friend