As you are likely one of a very few lucky folks to have a pair of DSP9's, there may not be much help here. On the XE speakers, it is in the advanced comms menu. You must enable the speaker as controller and then IR will show up as being enabled. If all else fails give Bruce a call.

Trinnov Alt32, 271, 808v6, DSP5200SE, DSP7200.2HC, M6, QNAP TS451, 218 various other bits.