3 questions

[Alex1234]

does subwoofers need burn in before you can play loud? or is it just a myth?

Does rounding of corners inside the box and inside the port mathers? or is it just the end of the port that needs rounding?

can i use one orginal starter battery in front and one large AMG batteri in the back? or do the batteries needs to be matching?

[Agreene]

1: in most cases you need to "break" the subwoofer in. because the new suspension is stiff your subwoofer will need a break in period before you start wailing on it the lower notes is where your subwoofer requires more movement. which is why you need to break it in.

2. it doesn't matter but most people do it, it allows better air movement in the box. do you need to do it ? no . but is it good that you do? yes

3. ideally you want to match batteries, but having stock up front and agm in the back is fine for a period of time until you can get the agm up front

[SnowDrifter]

1. No. Although that being said, if you tend to push your subs to near the point of bottoming out like I do, let it loosen for about a song to knock off the initial stiffness then go to town

2. That's a long ongoing debate. Personally, I round the edge of my port on the inside of my box, and the port opening on the outside

3. You want to avoid it. Reason being that your stock "flooded" battery will have a lower resting voltage than your AGM batteries, dragging down your nice new battery any time car car is off. It's a parasitic draw

[Alex1234]

thax both good answeres:)