Not meaning to drag a dead thread back to life but this was the question that I had, as well. While it's been a while since I've used my Amplifi 150, I wonder if you could just assign a preset with absolutely ZERO effects on it to one of your four main channels on the Amplifi and then run your Helix through that "clean" channel? By doing so, you eliminate the need of the Bluetooth compatibility component of the amp.
The question then becomes how to hook it up? You've got a 1/4 guitar jack, a USB jack, and the headphone jack on the Amplifi. That's it. For someone with that amp, it might be nice to utilize it instead of having to purchase an FRFR speaker.
Anyone have thoughts on how to hook it up or thoughts on using it in this fashion?