The Technisonic A775 eyebrow expansion panel provides for eight adjustable supplementary inputs to the A710, A711, A720 or A721 which increases the total number of inputs from ten to eighteen. This panel outputs to the SUM input of any A700 series audio controller. Again the unit is shipped with two default legends which are easily changed in the field. A website template is available for downloading. The completed template can be faxed to Technisonic for purposes of making a custom legend. A770 and A775 are Dzus mounted and require 28V power.