so the dayton has power, ground, remote, you can install it anywhere. On the dayton, there's a USB plug, you plug the dongle into it, viola it becomes a bluetooth head unit basically., you can stream music directly onto it and it'll output music to all your amps. There's a smartphone app (download and play around with it, just search dayton dsp on the playstore/apple store). Its APTX so the signal quality can support lossless files, the quality of the signal is full range and extremely strong and clean compared to most head units. The audio tuning capabilities is better than any head unit on the market except for a 1000 $ pioneer audiophile unit. It'll cost you 150 for the dsp and 30 for the dongle.
you can actually also wire it up like an LOC if you wish as well and choose between speaker level signal from your head unit or direct bluetooth stream to the dsp. The unit has signal summing which combines the signal from your front and rear speakers to hopefully get something full buuuuut I doubt it lol. Its just an option though, the dsp is extremely flexible. You can even use it for home audio as well.