Areo or slot

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I have 2 bxxx 4000 to power all 4 woofers...I got the power to push it all..had to wire them up reverse polarity but just didn't have the air space to get low hrz....I could only go 54 deep.because of my fuel neck.hose so I'm limited to space with 5 amps and 4 batteries in the bed

Why did you have to wire reverse polarity? Even three 15's in a fourth order blow through would be a good match for that airspace. Hifonics isn't real popular in here. A Taramps MD12K or a Sundown SFB8K would out perform those Hifonics pretty handily. To each his own though. @Buck and @shredder2 this is his old box. 🤔

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Why did you have to wire reverse polarity? Even three 15's in a fourth order blow through would be a good match for that airspace. Hifonics isn't real popular in here. A Taramps MD12K or a Sundown SFB8K would out perform those Hifonics pretty handily. To each his own though. @Buck and @shredder2 this is his old box. 🤔

View attachment 27897
My buddy said so they would pull not push since they where facing each other..
 
had to wire them up reverse polarity
You do not. Though it shouldn't matter. The only reason you would want to worry about that is if some subs were mounted inverted and others not. It is often worth trying reversing polarity of subs regardless though just to see which phase blends better at crossover point to the mids. Normally there will be little audible difference.

That said, at least one of the chucklefucks here has never even built a box in their life. 7 cube isn't too out of the ordinary per 15" sub. You will gain more output and efficiency from going with a big box (at a point you hit diminishing returns) but you will need to be mindful of hitting mechanical limits of your subs. If you know your subs perform well in a large box I don't see a problem.

Similarly with ports, you will always gain from a larger port though there also you hit diminishing returns and eventually hit physical impossibilities. Round port is most efficient, and flared edges also add efficiency, but rectangular or some other shape may seem more practical when you start putting things together. Provided you follow the fundamentals of port design it shouldn't be terribly dramatic which way you go.
 
You do not. Though it shouldn't matter. The only reason you would want to worry about that is if some subs were mounted inverted and others not. It is often worth trying reversing polarity of subs regardless though just to see which phase blends better at crossover point to the mids. Normally there will be little audible difference.

That said, at least one of the chucklefucks here has never even built a box in their life. 7 cube isn't too out of the ordinary per 15" sub. You will gain more output and efficiency from going with a big box (at a point you hit diminishing returns) but you will need to be mindful of hitting mechanical limits of your subs. If you know your subs perform well in a large box I don't see a problem.

Similarly with ports, you will always gain from a larger port though there also you hit diminishing returns and eventually hit physical impossibilities. Round port is most efficient, and flared edges also add efficiency, but rectangular or some other shape may seem more practical when you start putting things together. Provided you follow the fundamentals of port design it shouldn't be terribly dramatic which way you go.
I think the problem I has with the 4 was each side was only 7cf and that didn't include wooden displacement so I was short on air..
 
You do not. Though it shouldn't matter. The only reason you would want to worry about that is if some subs were mounted inverted and others not. It is often worth trying reversing polarity of subs regardless though just to see which phase blends better at crossover point to the mids. Normally there will be little audible difference.

That said, at least one of the chucklefucks here has never even built a box in their life. 7 cube isn't too out of the ordinary per 15" sub. You will gain more output and efficiency from going with a big box (at a point you hit diminishing returns) but you will need to be mindful of hitting mechanical limits of your subs. If you know your subs perform well in a large box I don't see a problem.

Similarly with ports, you will always gain from a larger port though there also you hit diminishing returns and eventually hit physical impossibilities. Round port is most efficient, and flared edges also add efficiency, but rectangular or some other shape may seem more practical when you start putting things together. Provided you follow the fundamentals of port design it shouldn't be terribly dramatic which way you go.

You're right knuckle dikk, I built the whole back seat. Nice try. Sorry, @Caliboy916 this guy likes to ba a D-bag to me.

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Built one box. Well that makes you an authority. Carry on then.

I have never had good luck with multiple small ports. I see some guys do well with them but it has never done well for me. If you don't own the ports already you may reconsider.

Built multiple boxes. Nice try again. Why are you so worried about how many boxes that I've built? You have some fascination with me for some reason, creepy!
 
So much fail in this thread. The one guy giving solid advice is acutually super knowledgeable and debating with a self professed genius or something.
As far as my advice goes stay off this toxic thread and let happen whatever happens.
 
So much fail in this thread. The one guy giving solid advice is acutually super knowledgeable and debating with a self professed genius or something.
As far as my advice goes stay off this toxic thread and let happen whatever happens.
It dont bother me at all I just scroll past any negativity
 
You do not. Though it shouldn't matter. The only reason you would want to worry about that is if some subs were mounted inverted and others not. It is often worth trying reversing polarity of subs regardless though just to see which phase blends better at crossover point to the mids. Normally there will be little audible difference.

That said, at least one of the chucklefucks here has never even built a box in their life. 7 cube isn't too out of the ordinary per 15" sub. You will gain more output and efficiency from going with a big box (at a point you hit diminishing returns) but you will need to be mindful of hitting mechanical limits of your subs. If you know your subs perform well in a large box I don't see a problem.

Similarly with ports, you will always gain from a larger port though there also you hit diminishing returns and eventually hit physical impossibilities. Round port is most efficient, and flared edges also add efficiency, but rectangular or some other shape may seem more practical when you start putting things together. Provided you follow the fundamentals of port design it shouldn't be terribly dramatic which way you go.
^^ This guy doesn't chime in too much, but when he does, it's worth listening to.
 
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