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Rewiring a cabinet

#22
fnordlyone said:
Wow, that first vid looked like a Jackson Pollack come to life! But it seems the cab is sealed. Looking at the small space between the speakers… cries out for the aforementioned bracing; also have you tried it standing vertical?

fear not, it can be fixed
fnord!
Click to expand...

Yep that lining looks quite psychedelic! :D

I plan to use this cab vertically. It sounds the same in both orientations.

Are there any rules for bass cab bracing?
(I looked a few sites about cabinet building/bracing but they were mostly talking about full range home theater speakers.)
 
#24
Donny_Pbass said:
Had a similar problem. 15" front ported cabinet Distorted at hi volumes. Added internal back bracing and cut additional 3" back port. That solved the problem. The plastic jack plate could be the rattle, and none, or too small port could cause speaker distortion.
Click to expand...

My cabinet is sealed, so the distortion here can't be some sort of port chuffing... but anyway I looked for any visible air leak and fixed them.

I'm still in the process of adding bracing, but the cab already sounds like it is "tighter" (I mean, the panels sound pretty dry when knocked).

I will try seal the jack plate with silicone as well.
 
#25
When I got my pre-owned cabs, the drivers were distorting as well. Took them out of the enclosure and they sounded fine. It turns out that the previous owners didn't tighten the screws to the baffle equally thus making the basket distort. What I did was to lie the cab on its back with the drivers facing the ceiling. I then took out the screws and let the driver rest on its mounting hole. While running a tune through the cab I then screwed-on the driver in a star pattern similar to mounting a spare tire on an axle to keep the tension equal around the driver lip. When the driver starts to distort, back the screw off.
 
#26
Jaco D said:
When I got my pre-owned cabs, the drivers were distorting as well. Took them out of the enclosure and they sounded fine. It turns out that the previous owners didn't tighten the screws to the baffle equally thus making the basket distort. What I did was to lie the cab on its back with the drivers facing the ceiling. I then took out the screws and let the driver rest on its mounting hole. While running a tune through the cab I then screwed-on the driver in a star pattern similar to mounting a spare tire on an axle to keep the tension equal around the driver lip. When the driver starts to distort, back the screw off.
Click to expand...

I'd never think that screw tension could cause driver distortion...

I usually tighten them until they pretty much won't turn any further :D
 

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