what are some good ways to brace a ported box (8 cube) ????

[12VoltInstaller 10+ year member]

are you for real? Your showing a duct taped enclosure...and how "this is how its done?" What happens when it gets to 130 deg. in your trunk? You just go back through and add another "fresh layer"???....I see the rods how you used them...that part works just fine.....single layer baffle....ehhh ok.....and why 2 rods? Thats kinda a short baffle for such over kill....does that box keep your bottle of CRYS chilled too?.....wow...I just keep looking at this....are those Aero Ports too???? Not too worried port flutter?

 

[Lakota 5,000+ posts]

I agree. Dowels will have a considerable resonant quality you may want to consider...depending on how long they are.

Hmm... I wasn't aware that dowels need washers and have threads for nuts.

 

[Lakota 5,000+ posts]

are you for real? Your showing a duct taped enclosure...and how "this is how its done?" What happens when it gets to 130 deg. in your trunk? You just go back through and add another "fresh layer"???....I see the rods how you used them...that part works just fine.....single layer baffle....ehhh ok.....and why 2 rods? Thats kinda a short baffle for such over kill.

I've never had a problem with duct tape. You shouldn't have a problem with good quality tape. I don't have a trunk btw, I drive a truck. Yeah the rod probably is overkill, but what the hell? It's not hurting anything. Besides, this was one of my first boxes that I ever made, I don't run it anymore. 2 rods spreads the load over a larger area rather than a single concentrated spot, which decreases pressure. Pressure = Force/Area in case you didn't know.

 

[babaganoush123 10+ year member]

Lol So Whats The Best Brace Way? I Was Lookin At The Rods What Do You Think...

 

[Lakota 5,000+ posts]

Lol So Whats The Best Brace Way? I Was Lookin At The Rods What Do You Think...

Rods are the best way. Much better than using wood. Do a search on here because I know that there are others threads on this same topic.

 

[12VoltInstaller 10+ year member]

Hmm... I wasn't aware that dowels need washers and have threads for nuts.

?????? What are you reading? Are we reading the same forum?

 

[12VoltInstaller 10+ year member]

I've never had a problem with duct tape. You shouldn't have a problem with good quality tape. I don't have a trunk btw, I drive a truck. Yeah the rod probably is overkill, but what the hell? It's not hurting anything. Besides, this was one of my first boxes that I ever made, I don't run it anymore. 2 rods spreads the load over a larger area rather than a single concentrated spot, which decreases pressure. Pressure = Force/Area in case you didn't know.

You dont need to get all NEUTONIAN on me.... if you did the equation...you would have found that only a single rod would have been nec. for that application....I mean if its that important...why dont you just put your subs in a jail of threaded steel rod....at least someone wont steal your good ideas that way!

 

[12VoltInstaller 10+ year member]

if the box is already in place and fabricated the rods are the least expensive and most effective for the "Pressure = Force/Area" so generously offered by Lakota...just in case we didnt know.

 

[IgnoreMe 5,000+ posts]

if you would like to brace the enclosure with materials you already have laying around...you can take your piece of MDF that fits like a divider would then swiss cheeze it....or cut out cosmetically pleasing and strategically placed holes to minimize the amount of material to decrease the amount of displacement and restricted air flow. Make the holes at least 3" when using a hole saw....or get creative and make shapes like a celic knot has in them....they look cool and as long as you cut them correctly they will have solid structure. If you cannot see the internal brace from any direction...the cosmetics do not matter at that point.
Also, if you would like to try to eliminate standing waves, insert small pieces roughly 2 1/2" wide by 3-4 inches long evenly or not so evenly spaced the length of the long walls of the enclosure...basically cut the 2 1/2" long side to a 45 deg. so they fill the corners of the enclosure but do not elimiate the entire air space. This will allow the sound waves to bouce off the corner instead of accumulating in the corners and causing a dead spot.

Just some food for thought

LOL. standing waves in subbass freqs.

the wavelengths are WAY to long to be of any issue for that freq region.

 

[12VoltInstaller 10+ year member]

so your suggesting there is never an instance in a sub woofer enclosure that will result in standing waves internally?

 

[IgnoreMe 5,000+ posts]

so your suggesting there is never an instance in a sub woofer enclosure that will result in standing waves internally?

standing waves are a non issue for subbass freq in enclosures due to their size.

 

[Lakota 5,000+ posts]

You dont need to get all NEUTONIAN on me.... if you did the equation...you would have found that only a single rod would have been nec. for that application....I mean if its that important...why dont you just put your subs in a jail of threaded steel rod....at least someone wont steal your good ideas that way!

I do things the way that I do because of reasons. What good is it to do something if you don't understand why?

 

[Lakota 5,000+ posts]

standing waves are a non issue for subbass freq in enclosures due to their size.

What do you know?

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[Lakota 5,000+ posts]

?????? What are you reading? Are we reading the same forum?

You commented on my comment about how to put threaded rod in a box. However, the comment that you left was about dowels, not rod. Did you even read what I typed before you responded?

 

[12VoltInstaller 10+ year member]

Ok...dude...if your gonna try to dig on me....why did you buy a MAZDA and still think and post that its a MAZDA.... Thats a FORD RANGER DOOOD....and you tuned your enclosure to 40hz in a less than extended cab truck....I bet it rocks at your bumper....152.8 at the bumper...on the TL...stiff....what?

Ok...secondly....you do things for a reason. Extrapolate on your reasoning.....

Please...someone that is clear of mind....read this thread....am I the only one in here that is reading all this unclearly....after all these posts....about setting up bracing...and we have come to this?

The quote on the agreement of mine to your post....had you quoted about your post on the threaded rod...not the dowels....I do not agree with the resonant quality of the dowels in such a high power application. I was agreeing with you....and your gonna attack me for that? wow

and your post about the standing waves and or cancelling waves in the enclosure being a non issue..... Im not buying it. Are you basing that off of theory...or actually sitting inside the enclosure with a mic measuring Db ratings in the corners.???? In that large of an enclosure...you dont think you will have reflected waves from the windshield back to the back of the enclosure? Omni directional and free to bounce where they want. Having a pocket of area that isnt designed for or at least an attempt at making the area as unavailable for cancelling waves as possible....your saying would be a moot point?

It sounds like your designing enclosures to play one note...once. in that case. You'd be right