Just make sure if you change any setting in ur deck and I mean any setting to recheck rca out distortion.
I had all mine set and unhooked the battery’s to work on wiring upgrades and for some reason it reset all my setting in my deck which has never happened before.
I ended up blowing a coil because time alignment got turned in by default and caused me to clip at volume 32 and I had it set to 40 going full blast. So 8 past clipping lol.
250 dollar mistake I will never do again, I almost cried when it happened. Now at any high volume it makes a loud ping sound, and if you push down on the dust cap you can hear it rubbing on something.
Glade a drop in kit for an NSV4 is only 250 when the sub cost 1150 dollars.