So after our portable Strand 300 Series bit the dust after our outdoor concert season last summer, one of my coworkers called a friend up, said we needed a two-scene preset for under $1000, and then next morning overnighted from Cleveland we had a Strand Mantrix MX 24 in our hands. We setup our outdoor stage today, brought in our audio company, and got our entire space ready for the season, complete w/ overnight rent-a-cop to keep the equipment protected until tomorrow's show. We cracked out the Mantrix and Martin was about to plug it into the audio company's touring dimmer rack, but it accepts MPX, but they also provide a DMX==>MPX converter, however he wanted to set this up without converting the signal. Anyways, he asked me about D54, because it's a 3-pin output, and the MPX is a 3-pin input, and wanted to know if that's the same. He's been in the business for many more years than I, and until today I had never even heard of D54. Lo-and-behold, it works. I'm sort of curious now though, what are the differences and simliarities between D54 and MPX that it works without a problem. I wasn't able to find much on D54 besides that all of the dimmer levels can be seen on an oscilloscope. Does anybody know anything about D54 and why it works without a hitch? ========== Better Question, how does D54 relate to AMX, DMX, SMX?