Don't the manufactors say that regular XLR (microphone) cables is not to be use as DMX ? But that is probably because of the resistance.
And there is the question.. If you use a cable that has to low or high resistance, is it possible to custombuild a termination plug to suit the DMX requirements ?
And normally it's only special fixtures that demands this.
"We use normal microphon cables for DMX connections as we don´t want to build up a seperate DMX cable park works fine too. "
It works fine but it's unstable. The dimmers may start to flicker, and you can damage fixtures like movingheads and scanners.
The thing with CAT5 cables that I really like is that you can get hold of cables with 4,8, 12,16, and up to 256 pairs. So you can actually have in one cable (and it is actually not that expencive), 102 DMX512 and 170 DMX256 cables in one cable Thats what I call a multi-cable :twisted:
And you can build the DMX into a patch-system, so that you are preperd for Ethernet, ChilliNet and the other new systems. You can even combine it with the sound. And all in one cable, with shielding enough for them all.
And the signal won't even leak.
Think this was a little off-topic now though, but...