I use to be a car audio nut.
More details on what you are rockin would be good.
I mean you have 2 12 inch subs and want to add another 2? I use to have 2 12 inch Kicker subs in a car and my rear view mirror would do circles and the seats in the car would physically move. Crazy insane loud and it kicked the snot out of you.
You want 4 12 inch subs??? Are you using the minivan as a sound system at the Saddledome?
Not all car audio is created equal. It is a pretty crooked industry if I am being honest.
A cheap 800 watt amp may only produce 100watts of power. Where as a quality amp rated at 100watts may be able to produce 400watts of power depending on the ohm load. Running speakers in parallel or in series.
Speaker ratings are all over the place too. Speakers power ratings are a joke.400 watt speaker can get blown up with 50watts of power. They rate the speakers at a certain frequency. They might be able to handle 400watts at 40kilohertz which a human cant hear, but blow up with 50 watts of power at 50 hertz.
Dont let name brands fool you either. They sell junk too. They also sell some good stuff too.
Lastly speaker box design. An awesome sub in a poorly designed box will suck. Do you want to run a sealed box, Ported, Bandpass, isobaric? In the properly designed box one sub can sound like 2 or 2 can sound like 4.
Then there are crossovers that control the frequencies to each speaker. Capacitors, wiring.
I have spoken too much sorry. I don’t know what you know or do not know.
You say factory speakers suck. Yes in general they do, but if a capacitor is used it can block unwanted frequencies from being played by a factory speaker. Making them sound so much better.
Need more info from you. What are you trying to achieve? Competition stereo, loud,quality, kick butt system on a budget?
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