I have a sundown sa 15.Its in a custom box at 33hz, powered by a hifonics brutus 1200. I have cheap 1200 watt amp kit from walmart right now but here very soon im upgrading to knukonceptz kca 1/0 amp kit. First question is : will i tell a difference in loudness or quality from this better wire? 2nd question is : how should tune my amp for my sub. Right now i have everything set to half way. My level is set to where im pushing around 900-1000 rms. help me out guys! I will greatly appreciate any tips

Right now my amp is set to where theres no distortion. If i turn my bass boost up on my amp then there is distortion so i keep it half way. I want it to be loud and clean. I just dont wanna blow my sub or amp.

Not familiar with the amp but you want bass boost all the way down. Low pass filter not too high. I set my gains by ear. Hard to explain that too much. I just listen for any signs of stress on my subs.

Not sure about noticing a difference in changing your wire. Walmart amp kit scares me lol. I would upgrade that for the piece of mind. Couldn't hurt.

new wire and big 3 could help if you have dimming/low voltage. unless the walmart stuff is really undersized you wont hear an audible difference. 

Thank you. And the walmart amp kit actually is t too bad haha. Ive used it for a while, but yea it scares me too lol. Thats why im upgrading.

Thank you. And the walmart amp kit actually is t too bad haha. Ive used it for a while, but yea it scares me too lol. Thats why im upgrading.

What gauge is it?

most likely you wont hear an audible difference, also I don't recommend setting your gains by listening I would grab a dmm and set the gains with that... wondering how you have your stuff wired to.. is it a dvc 1or 2 ohm?

I would do just the opposite.Set the gains by ear. A dmm just gets you close. Not much better then a smd dd-1.