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Also what is the purpose of the baffles inside the box? Just a different type of bracing

Spl

Im planing on building a box for 2 sp4 15s. Is it better to separate the chambers or just have one big one. And also the box im looking at building is around 8 cu ft or 4 if separate.

How do i get one? 4000 watt rms

is that an sp4?

ive still got to do some wiring it was just thrown in for now till we get a little warm weather

Ive got a 200 amp alt. 0 gauge wire. Big 3. Sundown 2500.1. 2 kinetic 800. My volts dont drop below 12. How do you post pics

I didnt realize the price was gonna be that much. Its in a 3.75 cu port box now. I believe its tuned to 35hz is what the kid told me.

its in an explorer so i have plenty of room

How much and i figured a recone was needed

Ive got a sp4 15. Is it possible to switch the basket to an 18.

Ive got a single sp4 15 in a 5.7 cube box. It just doesnt seem to be as loud as it should. I dont really have a lot of space in the trunk. Right now its ported thru the seat and spose to be tuned to 35hz using round ports. Do i have the ports facing wrong direction cause ive tried a few different things and nothing helped. The usable room in the trunk is 34w 14h and 36d. And help would be great. Im new to this. But i can build a new box if need be