After collecting parts for a few years now it is now time to start moving on this project. This will be a modification to the original statements. The major difference being the box design. The main difference will be to add complexity to the design
To be short, this is to build in a double walled box. In between will be filled with very fine white silica sand. Ribs every three inches grooved into the internal and external walls to separate the walls and maintain stiffness. This does three things: 1) it is an excellent damper - dampens out all passive box vibrations. 2) Isolates the external walls from the internal = allows for any kind of hardwood to be used on the external rather than veneer. 3) Adds stiffness to the side walls and back wall.
I have currently already built a pair of speakers in this fashion and a sub and the difference blew me away. The bass is amazingly clean and crisp. Being able to use hardwood for the external gives durability over the long run and also adds to the beauty of the system. The internal structure will be standard MDF.
I will try and attach the drawings and see if they go through....
I may have to mess with the crossover some... we will see. The front baffle width has increased from 11.5 to 12.5. The internal volume has remained roughly the same. Due to the sidewalls being 1.75 thick this reduced the internal width a bit. I made up for it by increasing the depth and height of the cabinet to get back to the right volume. The crossover will go under the bass for easy access. This is also where the sand will be added and flowed in.
Currently this is slightly on hold till I finish up building my cyclone dust collection system. It appears that I am highly allergic to the wood that I am using ~ Bolivian Rosewood. So far this is coming along and shouldn't take too long. Happen to have almost all the parts laying around... and then I will be back on track for this.
So, just thought I would throw this out there...
Nate
To be short, this is to build in a double walled box. In between will be filled with very fine white silica sand. Ribs every three inches grooved into the internal and external walls to separate the walls and maintain stiffness. This does three things: 1) it is an excellent damper - dampens out all passive box vibrations. 2) Isolates the external walls from the internal = allows for any kind of hardwood to be used on the external rather than veneer. 3) Adds stiffness to the side walls and back wall.
I have currently already built a pair of speakers in this fashion and a sub and the difference blew me away. The bass is amazingly clean and crisp. Being able to use hardwood for the external gives durability over the long run and also adds to the beauty of the system. The internal structure will be standard MDF.
I will try and attach the drawings and see if they go through....
I may have to mess with the crossover some... we will see. The front baffle width has increased from 11.5 to 12.5. The internal volume has remained roughly the same. Due to the sidewalls being 1.75 thick this reduced the internal width a bit. I made up for it by increasing the depth and height of the cabinet to get back to the right volume. The crossover will go under the bass for easy access. This is also where the sand will be added and flowed in.
Currently this is slightly on hold till I finish up building my cyclone dust collection system. It appears that I am highly allergic to the wood that I am using ~ Bolivian Rosewood. So far this is coming along and shouldn't take too long. Happen to have almost all the parts laying around... and then I will be back on track for this.
So, just thought I would throw this out there...
Nate
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