I love my SPE 1.3K-FA amplifier, but the LCD panel is too bright and can't be adjusted. I looked around on E-bay and found some 3M film which I cut to size and placed over the display. It looks much better. The cost was $2.49 for a 4x6 sheet. I traced the display window onto a piece of paper, placed the film on top and cut to size.
3M Color Stable 35% VLT Automotive Car Truck Window Tint Film Roll Multi Sz CS35