Is there any way to use my T2+/RP6 combination to switch my MX134 to zone b? The manual calls for some McIntosh Accessory Keybad OR by pointing a remote control at the sensor located in Zone B to turn on Zone B. I'm not sure how they expect you to turn on zone b without sending a signal to the other equipment but I'm looking for and IR code to use with my RTI setup.

The best way with an RP6 would be to use a CM232 and do RS232 control of both zones (volume needs to be IR). I just took a look at the back of our demo MX136, and it has an A and a B IR input. I believe A to be for Zone A, and B to be for Zone B (I don't use zone B on these to often). I'm using IR for vol up/down, when I move from the A jack to the B jack, I lose control of Zone A, so I assume that B is for Zone B; but remember what happens when we assume.

After verifying this (because we had only assumed), use port routing in the RP6 to send the commands to the proper input.

I have also assumed that the MX134 is pretty similar to the MX136 in connection and operation. This is a relatively safe assumption, as McIntosh doesn't change up their control schemes very often. Hope this helps a bit.

Just go in to the "B" Ir input on the Mx-134 to control zone B, and turn off the output on the RF-6 going to the "A" ir in on the MX-134. the ir codes are the same for zone "A" very simple.