two sides of the box story

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cutlass013

Copper - Posts: 95

Joined: July 27, 2006

Location: United States

Posted: August 30, 2006 at 10:23 PM / IP Logged

on a woooden or any box really i have wondered what is the best back? a slanted back or flat back... i have heard many a stories about them both and was wondering wich was better? is a slanted box louder than a flat or vice versa or souds better..?...its a question i have a debate on and help would be useful thnx

cutlass013

Copper - Posts: 95

Joined: July 27, 2006

Location: United States

Posted: August 30, 2006 at 10:25 PM / IP Logged

also lets say on a fiberglass where the subs were mounted at an angle would the subs see the back as slanted or would flat

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: August 30, 2006 at 10:29 PM / IP Logged

I matters not, young grasshopper. The quest is for internal volume, not slopes or flats. Seek the perfect space; shape matters less than the single grain of sand on the beach.

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Flakman

Copper - Posts: 365

Joined: April 25, 2005

Location: United States

Posted: August 30, 2006 at 10:31 PM / IP Logged

...but, Master, I am still unable to snatch the pebble from your hand. two sides of the box story -- posted image.

The Flakman

I feel strange. I have deja vu and amnesia at the same time.

John | Manteca, CA

cutlass013

Copper - Posts: 95

Joined: July 27, 2006

Location: United States

Posted: August 30, 2006 at 10:36 PM / IP Logged

lol i like that movie....cause i have always heard about you having a slanted back because the sound will not bounce off the walls right will cancel them selves out or sumthing like that

stevdart

Platinum - Posts: 5,816

This member consistently provides reliable information

Joined: January 24, 2004

Location: Pennsylvania, United States

Posted: August 30, 2006 at 10:42 PM / IP Logged

A slanted back may fit against the back of the seat better. Personally, I like to build slants into the enclosure somewhere. It speaks "CUSTOM", this grain of sand...

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

aznboi3644

Gold - Posts: 2,600

Joined: May 01, 2006

Location: United States

Posted: August 30, 2006 at 11:19 PM / IP Logged

Aren't the sound waves emminating from the back of the sub too long to cancel each other out inside a box??

Flakman

Copper - Posts: 365

Joined: April 25, 2005

Location: United States

Posted: August 30, 2006 at 11:26 PM / IP Logged

I think there have been threads discussing this. May have been Dyohn or haem (or both) as well as some other stuff I have read and can't remember (getting too old). All saying basically that it will not affect the performance or sound quality of the sub. If you look at the manufacturers as well, a lot of the boxes that they recommend are very square. If this were an issue, they would be recommending slanted fronts or backs. The main thing is to make them very very solid since they will be more susceptible to flexing.

The Flakman

I feel strange. I have deja vu and amnesia at the same time.

John | Manteca, CA

haemphyst

Platinum - Posts: 5,054

Joined: January 19, 2003

Location: Michigan, Bouvet Island

Posted: August 31, 2006 at 8:48 AM / IP Logged

Like Dyohn says: Volume is the quest.

aznboi3644 wrote:

Aren't the sound waves emminating from the back of the sub too long to cancel each other out inside a box??

Yes, young padawan (to mix movie metaphores two sides of the box story -- posted image.

), you are absolutely correct. In terms of "canceling", it can happen, but only at relatively VERY high frequencies - FAR beyond where you should be running any subwoofer.

A box 12 inches deep CAN exhibit some cancellation effect, at 1130Hz (the fundamental - 180º, 565Hz and 2260Hz - 90º), and this is where a slanted back or proper application of damping can help... At subwoofer frequencies? Fugeddaboudit.

It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Flakman

Copper - Posts: 365

Joined: April 25, 2005

Location: United States

Posted: August 31, 2006 at 12:50 PM / IP Logged

*using a Yoda voice* Mmmm, yes. To heamphyst you listen. two sides of the box story -- posted image.

The Flakman

I feel strange. I have deja vu and amnesia at the same time.

John | Manteca, CA

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