A:AnswerThese are not powered speakers; you will have to connect them to an amplifier which will send the signal to the speakers. Hence, the amplifier will determine bluetooth compatibility.
A:AnswerIt all depends on your receiver I’m running these with a Yamaha receiver with music cast and anyone on my network can play music through these speakers.
A:AnswerYou will be fine using these with your zone two connection. I have a Marantz which is similar to your Denon and I use it to power my backyard speakers with no problem.
A:AnswerRecommended wattage is 75 watts with a peak power handling of 150 watts. The Klipsch AW-650 is rated at 85 watts with 340 watt peak. I am sure there are more powerful speakers out there since the world of speakers is quite large. I just have always liked my Klipsch.
A:AnswerI have replaced mine twice (under warranty) for rusting front grates. My speakers are mounted about 5 feet away from my swimming pool. I am considering the Klipsch AW-650 instead. The Bestbuy site says that model has an aluminum grate.