did an install with my first one today... used a mx-900 with a mrf-260 base, dla4. there is no ir receiver in the dla, so you have to cut off an emitter and put the wires into the ir/ground terminal blocks into the back. (all ir inputs are bridged, and each zone has discrete codes for each function, so only one output from rf base is used). worked wonderfully. they also have the codes for a few different remote manufacturers on their web site. i will definitely be using them again instead of using basic speaker selectors and in-wall volume controls. absolutely love it, and so did my customer.

[Link: atonhome.com]