box design or bad idea?

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jmelton86

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Posted: March 06, 2007 at 8:12 PM / IP Logged

I want to build a box that is small yet reaps huge output. I was thinking to build a sealed box according to Kickers' specs' and face the speakers up. What I want to do is use a piece of plywood the same dimensions as the top board (where the speakers are mounted) and use 2" risers to hold the board parallel to the top of the box, on the top. I will call this a 'dispersion' board. I'm thinking that this would have the same effect as facing the speakers down but without having to worry about the speakers being too saggy. This would also deter thieves as the 'dispersion' board will be bolted to the box- thieves can't get to speakers.

What do you think of this design?

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stevdart

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Posted: March 06, 2007 at 9:16 PM / IP Logged

If your idea of firing upwards is to keep sag factor out of the equation, and if sag is indeed a factor with this sub, you're out of luck. Sag factor applies to both up- and down-firing. Gravity works against it either way.

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

jmelton86

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Joined: February 07, 2007

Location: South Carolina, United States

Posted: March 07, 2007 at 12:03 AM / IP Logged

Dang. Yes, that factor of Sag is what I was trying to get around. -Alright I have a question. Is the Sag such a major concern if the area air has to escape (from the front of the cone) sort-of restricts how 'easily' the speaker moves (I am under the impression that this is why too-saggy speakers fail while downfiring)?

2013 Kia Rio -90a alternator

DDX470HD GTO14001 GTO1014D (x3)

Big3 in 1/0G

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aznboi3644

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Posted: March 07, 2007 at 12:29 AM / IP Logged

jmelton86 wrote:

Doesn't matter if the box is in a dual reflex bandpass box.

Gravity affects EVERYTHING...you can't change the law of gravity

jmelton86

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Location: South Carolina, United States

Posted: March 07, 2007 at 12:50 AM / IP Logged

So this design would be loud but damaging to the speakers?

2013 Kia Rio -90a alternator

DDX470HD GTO14001 GTO1014D (x3)

Big3 in 1/0G

1/0G to GTO14001

ra0062

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Joined: December 10, 2006

Location: United States

Posted: March 07, 2007 at 5:55 PM / IP Logged

Your design is exactly what I was going to try next for more output. I have my subs up firing, in a sealed box. Was thinking of mounting 3/8 or 1/2 Plexiglas, or something that would reflect the sound real well.

jmelton86

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Joined: February 07, 2007

Location: South Carolina, United States

Posted: March 07, 2007 at 6:13 PM / IP Logged

Has anyone done this before and pushed power to the subs? Right now I have 3 subs downfiring and love the ouput from 250wrms to each. They are KickerComp 10's and 1 RF P1. Is the fact that they are stitched the only thing saving them? I am really considering doing this for SPL and sub 'security'.

Anyone?

2013 Kia Rio -90a alternator

DDX470HD GTO14001 GTO1014D (x3)

Big3 in 1/0G

1/0G to GTO14001

aznboi3644

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Posted: March 07, 2007 at 7:32 PM / IP Logged

Once it warms up ima build this for a couple 25 dollar subs and see how they do

inverted wedge

jmelton86

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Joined: February 07, 2007

Location: South Carolina, United States

Posted: March 07, 2007 at 8:20 PM / IP Logged

This is basically my setup now only the subs are facing straight down and the 'open' side of the bottom is facing the rear and not the sides. I'm very impressed in the performance. The bass is much louder and more accurate.

2013 Kia Rio -90a alternator

DDX470HD GTO14001 GTO1014D (x3)

Big3 in 1/0G

1/0G to GTO14001

Paradigm

Silver - Posts: 284

Joined: November 25, 2003

Location: United States

Posted: March 07, 2007 at 9:00 PM / IP Logged

jmelton86 wrote:

I want to build a box that is small yet reaps huge output. I was thinking to build a sealed box according to Kickers' specs' and face the speakers up. What I want to do is use a piece of plywood the same dimensions as the top board (where the speakers are mounted) and use 2" risers to hold the board parallel to the top of the box, on the top. I will call this a 'dispersion' board. I'm thinking that this would have the same effect as facing the speakers down but without having to worry about the speakers being too saggy. This would also deter thieves as the 'dispersion' board will be bolted to the box- thieves can't get to speakers.

What do you think of this design?

If the thieves get your box, they'll get to the speakers. I think what you meant to say was, what they don't see, they won't know to steal.

As far as the sag thing goes, I think there is a calculator on this site that may help determine whether your speakers will work for this type of application. Maybe you already tried this, but you didn't post it.

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