So here is my situation. I already have my deck setup as zone 2 on my HK AVR. I have an IR to RF converter battery (which is cheap and amazing) in my zone 2 remote so that I can control the volume and source out on the deck. Also I have a nice 100 inch screen that I can quicky set up whenever the weather is nice.
Now I am looking for a powered subwoofer that I can run my stereo zone 2 speaker wire to, and then it would pass the signal on to my out door speakers.
Receiver(left and right out)======powered subwoofer=====speakers
I have some power base stands (ELT PBS) indoors that do this already. They turn a passive 5 inch speakers into powered 8 inch woofers with the 5 inch speakers.