you'd be alot better off if you ran a power cord directly to your battery, so you amp recieves the full power it needs....also if you do run directly off the battery you'll need an inline fuse. Also, I dont know if you know this but if you do run it this way you need to tap another power source that only engages with the accesories are turned on..this is called the remote (in case you didnt know). Thats the way id run it, it also alow fo future upgrades.