My MRD M500 is hooked up just like it was in my other car and it powers up but will not draw more than 1A so sound output isnt increasing.Had this issue a few years back after a reinstall but cant remember what the issue was
Car Audio & Video - Alpine - MRP-M500 Car Audio Amplifier
Answers & Comments
Check the wiring again and make sure that you have it bridged right and that the remote wire for the amp is hooked up