No. You really don't want that either. Most receivers push wattage through speaker cables. Most often 12mm sized wires. True sound, uncompressed, need cables to push the exact wattage to each speaker. Without wires, the sound gets compromised. These only work well in small compact areas, like a bedroom, where you are not expecting too much power, and just a bit of 5 channel simulation.

They should be back in stock Midweek of July 26th, 2021.

Unfortunately, these can only be hooked up to the soundbar with the included dongle. The speakers only "speak" to the Klipsch soundbars. It definitely would be cool if they could be added to other existing home theater setups, after all, who wants that many wires? Those who want the best quality sound will tell you that you need the wires because they support the quality sound that the receivers are processing. Anything wireless or Bluetooth enabled tends to lose quality because the sound is not be transmitted directly. These are a perfect addition to a soundbar in a bedroom where you just want a virtual surround simulation. or you have a small space where wires cannot be hidden in the walls, or cannot handle a large system.

Of course you can. Just have your receiver calibrate it with the rest of your system.