Device appeared in the early 90's.
the time was the period of track whose center was done griven the specialist.
most: qualitée manufacturing, power, the effects obtained.
the least: the black-out not very effective, the lack of internal programs dmx only, so really limited.
AT THE TIME I did install the template 1200hmi, too powerful, the model 575 would hmi adequate.
the unit was its price (30000frs = 4800euros), and its weight in 50kg.
the machine from a time ........