necro post.The Apollo Smart Color scroller is pretty good about being silent if the scroll mode is set to a slower speed, how ever, if you have them set at high speed you will sometimes even hear something that sounds like ripping gels while the scroller is moving from color to color. Other wise, the Smart Color scrollers are literally whisper quite.
The fan speed for the most recent Apollo Smart Color scrollers can be controlled from the desk from 0 to 100%. The Apollo Gel Shield* will provide some protection if/when the fan is turned OFF, but gel is still thin plastic.The apollo scrollers are dead silent with the exception of the fan noise when set to low fan and slow speed. However, they are VERY slow when set to this (30 sec head to tail).