I got the below in today and tried it out from my phone jack to channel 1 and channel 2. It works fantastic and sounds great! Fading the balance left to right also decreases the sound volume accordingly so it is working as it is supposed to.
I think that TRS input is not capable of taking a stereo signal.
Oh I checked out that video and I am still not seeing any reason to add another DSP component to the system. It sounds great if I plug directly to my phone or using the BT receiver. And the parametric equalizer in the app gives just about any adjustment that is needed.
I'll need to get another set of cables since the 2 ends of this cable are too close together to use on 2 speakers. I'll see about getting probably 2 single cables that connect into a L/R splitter coming out of either my phone or the BT receiver.
Thanks for the help!