The bottom of the 777 was fitted with CONION C-100 meters & responds to the power going to the Super Woofer channels. I also modified the firing order of the LEDs so that the meters light up out from the center LED instead of left to right....See video
https://www.youtube.com/watch?v=UQmnb87itlw&feature=youtu.be
Cheers,
Cpl
https://www.youtube.com/watch?v=UQmnb87itlw&feature=youtu.be
Cheers,
Cpl