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My apologies, I meant the IR mini blaster that came with the Harmony Companion. (Actually it comes with two).
Normally the Hub will be able to broadcast the IR signals to reach all my devices, but for some reason it wasn't working on my 4k box. Logitech support suggested I put a mini blaster in front of the box, and now it works great.
thanks, which extender are you using? I checked Amazon and there are loads of extenders. I'm not sure what kind will do the trick
My Harmony Hub + Companion remote works perfectly with the 4K AX014ANM box I have, although I had to position an IR extender directly in front of it in order for the IR signals to reach the box. So nice to sit in front of the couch and let my Echo turn on the cable TV.
I have the 650 but I don't use it with my 4k box.
My Hamony Remote is a 620. Looking at other websites, this one apparently does not work with the new X1 box. It looks like the 650 might work.
Harmony remotes should work with the 4k box and just about any other X1 STB.