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Subwoofers up and down


robby512

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Posted

no, wire them all the same

Please explain your reasoning?

I feel like I'm missing something...?

Again,

One large box, same air-space, four holes.

Two subs mounted "normal" (magnets in the box), two subs inverted (magnets out of the box).

If this is the case then you must reverse the polarity on either pair of subs while keeping te other pair normal.

If the subs are all wired with the same polarity, then all four cones move "outward" with the initial music pulse.

Since two cones are facing the opposite direction, two will push into the box and two will push out of the box = cancellation.

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1 - XS Power D375

500F of Maxwell SuperCaps (soon to be 1000F)
iPadMini2

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Audison bitOne (Remote DRC MP)
Highs Amp - PPI Art A404
Hertz HSK130 (HSK165 waiting...)
DC Audio DC9.0K
2- DC Audio XL12m2

LEGAL             - 147.3dB @ 41Hz
OUTLAW         - 150.2dB @ 45Hz

OUTLAW         - 145.7dB @ 30Hz
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sig-sized6_zps0265e669.png

Posted

no, wire them all the same

Please explain your reasoning?

I feel like I'm missing something...?

Again,

One large box, same air-space, four holes.

Two subs mounted "normal" (magnets in the box), two subs inverted (magnets out of the box).

If this is the case then you must reverse the polarity on either pair of subs while keeping te other pair normal.

If the subs are all wired with the same polarity, then all four cones move "outward" with the initial music pulse.

Since two cones are facing the opposite direction, two will push into the box and two will push out of the box = cancellation.

I understood it to be all magnets inside the box. just 2 mounted on a top baffle and 2 mounted on a bottom baffle.

 

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Posted

no, wire them all the same

Please explain your reasoning?

I feel like I'm missing something...?

Again,

One large box, same air-space, four holes.

Two subs mounted "normal" (magnets in the box), two subs inverted (magnets out of the box).

If this is the case then you must reverse the polarity on either pair of subs while keeping te other pair normal.

If the subs are all wired with the same polarity, then all four cones move "outward" with the initial music pulse.

Since two cones are facing the opposite direction, two will push into the box and two will push out of the box = cancellation.

he's talking about having a box with 2 holes on the top of the box with the subs facing up and 2 holes on the bottom of the box facing down. all of the motors are inside the box. OP DO NO reverse polarity on any of them people were thinking you were inverting 2 of them so all 4 subs were on the same side of the box with 2 of them facing into the back and 2 facing out of the box. all of your subs are facing out of the box if you reverse polarity on 2 of them they will just cancel eachother out and you will get no significant air movement at all

Thanks I was pretty excited about the alt myself. kind of like a school girl, in a dress, on a swing. lol

It's warming up enough that the donut-punching cyclist douchenozzles are getting their two wheeled fagmobiles out.

My Build Log

Posted

Or are you talking about a box like this one?

All four firing up, two inverted two normal. (personally like this design a lot more)

859520_569407713069433_2132281285_o.jpg

b_350_20_692108_381007_FFFFFF_000000.png

Krakin's Home Dipole Project

http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370

Krakin, are you some sort of mad scientist?

I would have replied earlier, but I was measuring the output of my amp with a yardstick . . .

What you hear is not the air pressure variation in itself

but what has drawn your attention

in the two streams of superimposed air pressure variations at your eardrums

An acoustic event has dimensions of Time, Tone, Loudness and Space

Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears,

thus no formula can achieve a definite effect for every listener.

Posted

Personally i agree that looks pretty sick and the other one kinda reduces air flow from 2 of them i would think unless the idea is wanting to have a Thumper effect or something lol which i would think could tear up the cone...

Thanks I was pretty excited about the alt myself. kind of like a school girl, in a dress, on a swing. lol

It's warming up enough that the donut-punching cyclist douchenozzles are getting their two wheeled fagmobiles out.

My Build Log

Posted

I think the OP just needs something to look at because he seems to know what he wants in his head but just can't word it right now.

Edit: 100th Post!

b_350_20_692108_381007_FFFFFF_000000.png

Krakin's Home Dipole Project

http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370

Krakin, are you some sort of mad scientist?

I would have replied earlier, but I was measuring the output of my amp with a yardstick . . .

What you hear is not the air pressure variation in itself

but what has drawn your attention

in the two streams of superimposed air pressure variations at your eardrums

An acoustic event has dimensions of Time, Tone, Loudness and Space

Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears,

thus no formula can achieve a definite effect for every listener.

Posted

Lol i think the pictures were a good idea here visuals are always good

Thanks I was pretty excited about the alt myself. kind of like a school girl, in a dress, on a swing. lol

It's warming up enough that the donut-punching cyclist douchenozzles are getting their two wheeled fagmobiles out.

My Build Log

Posted

Or are you talking about a box like this one?

All four firing up, two inverted two normal. (personally like this design a lot more)

859520_569407713069433_2132281285_o.jpg

Thanks for the pics! :good:

The first post sounds like this configuration and is what I've been referring to.

I agree, I like this setup for an extended cab!

If this is the case then the inverted subs need te polarity reversed.

This post sent with 100% recycled electrons.
2004 BMW M3
Mechman 280A
2 - XS Power XP3000

1 - XS Power D375

500F of Maxwell SuperCaps (soon to be 1000F)
iPadMini2

Dash mounted O-scope
Audison bitOne (Remote DRC MP)
Highs Amp - PPI Art A404
Hertz HSK130 (HSK165 waiting...)
DC Audio DC9.0K
2- DC Audio XL12m2

LEGAL             - 147.3dB @ 41Hz
OUTLAW         - 150.2dB @ 45Hz

OUTLAW         - 145.7dB @ 30Hz
JUNE 2014 SOTM WINNER

2014 COLORADO PEOPLE'S CHOICE WINNER

SOTM BUILD:
http://www.stevemeadedesigns.com/board/topic/141656-wicks-e46-m3-build-bass-turbo-button-and-a-big-new-addition/page-68#entry2802026

sig-sized6_zps0265e669.png

Posted

he was meaning 2 subs firing up on the top of the box, and 2 subs downfiring in the bottom of the box, all magnets inside the box

personally I wouldn't do that I would run all 4 on top

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Posted

Do you mean a box like this? With two 12's firing up, and two 12's firing down?

*Note: No particular dimensions were used to make this box.

857132_569404779736393_71464245_o.jpg

Later in the thread the OP mentions this configuration and some confusion started.

If this is the case then all polarities stay normal (all magnets in the box).

Sorry if I caused any confusion...

This post sent with 100% recycled electrons.
2004 BMW M3
Mechman 280A
2 - XS Power XP3000

1 - XS Power D375

500F of Maxwell SuperCaps (soon to be 1000F)
iPadMini2

Dash mounted O-scope
Audison bitOne (Remote DRC MP)
Highs Amp - PPI Art A404
Hertz HSK130 (HSK165 waiting...)
DC Audio DC9.0K
2- DC Audio XL12m2

LEGAL             - 147.3dB @ 41Hz
OUTLAW         - 150.2dB @ 45Hz

OUTLAW         - 145.7dB @ 30Hz
JUNE 2014 SOTM WINNER

2014 COLORADO PEOPLE'S CHOICE WINNER

SOTM BUILD:
http://www.stevemeadedesigns.com/board/topic/141656-wicks-e46-m3-build-bass-turbo-button-and-a-big-new-addition/page-68#entry2802026

sig-sized6_zps0265e669.png

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