Hi folks,
The plan to make yet another cube enclosure with full range speaker. I know it's not the best but please bear with me.
Outside cube will be 18cm3. Internal wall will be 2cm thick with 4-layer perimeter and a 50% infill. Material will be black PLA. Outside will be sanded and painted, I want a piano black finish.
The front face will be made of 1 inch birch plywood.
I plan to use the Mark Audio CHR70.3 but I’m flexible if a better match could be found in the same price range.
Box will be closed back with some fill material, but it could be ported if desirable. I will use the speaker only near field in a small room. Port distortion, scuffle or other noise is a big no-no for me. That’s why I plan to go with closed enclosure and maybe add a subwoofer if I find the bass is lacking.
The big part that I need help is with the internal geometry. Maximum possible internal volume would be a 4L cube. However, since I’m printing it, I could easily make a cylinder, a demi-sphere, rounded corner, etc.
I thought going with the golden ratio, but it would reduce the internal volume to only 1L which is not desirable.
3L internal enclosure is possible with a demi-sphere design or a cylinder design. I’m not sure if losing 1L internal volume for that is desirable.
I could go the rounded corner route, which will have a lesser impact on the internal volume, but I’m not sure if it would help with the resonance or not.
What do you think would be the best to avoid the cube resonance issue?
Should I brace the speaker in such small enclosure ?
Thanks for you help
Look inspiration:
PLA 50% review :
The plan to make yet another cube enclosure with full range speaker. I know it's not the best but please bear with me.
Outside cube will be 18cm3. Internal wall will be 2cm thick with 4-layer perimeter and a 50% infill. Material will be black PLA. Outside will be sanded and painted, I want a piano black finish.
The front face will be made of 1 inch birch plywood.
I plan to use the Mark Audio CHR70.3 but I’m flexible if a better match could be found in the same price range.
Box will be closed back with some fill material, but it could be ported if desirable. I will use the speaker only near field in a small room. Port distortion, scuffle or other noise is a big no-no for me. That’s why I plan to go with closed enclosure and maybe add a subwoofer if I find the bass is lacking.
The big part that I need help is with the internal geometry. Maximum possible internal volume would be a 4L cube. However, since I’m printing it, I could easily make a cylinder, a demi-sphere, rounded corner, etc.
I thought going with the golden ratio, but it would reduce the internal volume to only 1L which is not desirable.
3L internal enclosure is possible with a demi-sphere design or a cylinder design. I’m not sure if losing 1L internal volume for that is desirable.
I could go the rounded corner route, which will have a lesser impact on the internal volume, but I’m not sure if it would help with the resonance or not.
What do you think would be the best to avoid the cube resonance issue?
Should I brace the speaker in such small enclosure ?
Thanks for you help
Look inspiration: