Do you think I need extra reinforcement to these braces? I hate to do any drastic changes but would rather try to get it right than having to redo them. I've never done anything this big though.
The internal dimension of the base module is 660mm x 210mm x 380mm.
http://www.geocities.com/hai_vu1/braces.jpg
The internal dimension of the base module is 660mm x 210mm x 380mm.
http://www.geocities.com/hai_vu1/braces.jpg
Plenty of bracing there.
The only thing I'd redo and I'm picky, would be the center brace on the bass cabinet. All of the two braces that connect front to back are only joined by a small amount of MDF because of the circle cuts in the adjoining brace.
It will be fine without but I'd redo the top to bottom brace with squares inside of circles to allow full contact on the other braces - OTT maybe but if a job is worth doing its worth doing right.
The only thing I'd redo and I'm picky, would be the center brace on the bass cabinet. All of the two braces that connect front to back are only joined by a small amount of MDF because of the circle cuts in the adjoining brace.
It will be fine without but I'd redo the top to bottom brace with squares inside of circles to allow full contact on the other braces - OTT maybe but if a job is worth doing its worth doing right.
ShinOBIWAN said:
I understand what you mean but I already ran out of wood and to do that I need to purchase another 4 x 8' panel. What I'll do is glue a small piece of wood at the opening in between those braces (that you mention) so that they are pushed against each other which would give them extra strength. Not perfect but a little bit better.
Off centre, prefereably at an angle... in the middle of a panel, the brace actually does little to suppress the 1st resonance of that panel -- it can actually enhance it (ie make it worse).
You should also make sure that the cross-braces are not symetrically placed as well, and that they don't brace to create a square sub panel.
dave
Any waveform that has a null in the middle of the panel will have a minimum amount of suppression. Because the wall is clamped at this null point, energy at similar frequencies can feed these resonances as well, giving a situation where the panel can actually be worse after bracing.
dave
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Dave,
How does the 'matrix' style bracing work out in a midrange enclosure? - ie braced squarely, every 4" or so front to back, side to side and top to bottom. Would this push any resonances up above the mids bandwidth ? 4.5" is 3000Hz.
I've been reading a bit on bracing recently, and some stuff seems to counteract the other so to speak. ie adding bitumen to panels lowers resonance / bracing raises. I also read somewhere to brace to raise the resonance and to add bitumen to kill whats left. Also can we not add stuffing to kill the 3000Hz before it hits the walls so to speak ?
Hope this isn't threadjacking btw - Can move it to a new thread if you like.
Cheers,
Rob
How does the 'matrix' style bracing work out in a midrange enclosure? - ie braced squarely, every 4" or so front to back, side to side and top to bottom. Would this push any resonances up above the mids bandwidth ? 4.5" is 3000Hz.
I've been reading a bit on bracing recently, and some stuff seems to counteract the other so to speak. ie adding bitumen to panels lowers resonance / bracing raises. I also read somewhere to brace to raise the resonance and to add bitumen to kill whats left. Also can we not add stuffing to kill the 3000Hz before it hits the walls so to speak ?
Hope this isn't threadjacking btw - Can move it to a new thread if you like.
Cheers,
Rob
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