This cap’ is amazing it really helps the amplifier hit harder and faster. It matches my PA amp and is very prominent in the trunk. The digital led reads the car’s DC voltage and it lights up a blue led when it’s discharging. I really like it, haven’t had any problems yet will update my review if it does have any led problems. (Side note: This cap is very big, almost twice the size of a 2 farad cap’. This makes the installation a bit tricky.)
