Hello!
I would love to hear your opinions on a project that I have in mind, which, however, may not make any sense at all... and feel free to tell me if that is the case 🙂
I am remodeling my sub-terrain wood workshop, and there is a hole in the floor from a previous heater installation, here is a close-up of that hole with its dimensions (ca. 1.5 x 2 meters, 0.5 meters deep):
It's all cement, just like the workshop floor itself. But since it is uneven, the plan is to cover the entire cement floor with a wood plank floor (leveled, sitting on shimmed beams).
But when I thought about something useful to do with this hole, the best idea I had was (at least so I think), to put a subwoofer in there.
I have two 18" McCauley 6174, which are left over from another project. For these I am planning to build a large subwoofer box (according to their T/S parameters).
Now my questions are:
- If all else fails... any better ideas for this hole? Here is a drawing of what the finished workshop shall look like, the whole is under the long workbench, where the dimensions are still drawn:
Thanks for any input!
I would love to hear your opinions on a project that I have in mind, which, however, may not make any sense at all... and feel free to tell me if that is the case 🙂
I am remodeling my sub-terrain wood workshop, and there is a hole in the floor from a previous heater installation, here is a close-up of that hole with its dimensions (ca. 1.5 x 2 meters, 0.5 meters deep):
It's all cement, just like the workshop floor itself. But since it is uneven, the plan is to cover the entire cement floor with a wood plank floor (leveled, sitting on shimmed beams).
But when I thought about something useful to do with this hole, the best idea I had was (at least so I think), to put a subwoofer in there.
I have two 18" McCauley 6174, which are left over from another project. For these I am planning to build a large subwoofer box (according to their T/S parameters).
Now my questions are:
- Does it make any sense at all?
- Would two much sound get lost, with the speakers under a wooden floor? Maybe cut slots into the wooden floor?
- Should I worry much about dust, and maybe build the box in a way that the speakers are not directly exposed, maybe a bandpass design?
- If all else fails... any better ideas for this hole? Here is a drawing of what the finished workshop shall look like, the whole is under the long workbench, where the dimensions are still drawn:
Thanks for any input!
Of course you're nuts, we're all nuts here.
But hiding two large subs under the floor seems pretty sane to me.
As long as there are air passages from the subs to your room.
But hiding two large subs under the floor seems pretty sane to me.
As long as there are air passages from the subs to your room.
Yes and no. Acoustically it can work, though the location is probably not optimum, and will require regular cleaning.
The speakers could be "slot loaded", a removable grill above so the plenum could be vacuumed out.
I'd use it to make a soundproof location for the air compressor, and put the two 18" McCauley 6174 in separate boxes that could be hung in the optimum acoustic locations along with the main speakers.
I’ve done similar for clients. Large subs under the floor with big metal vents to get the sound into the room. I used the same vents as the heating system so they looked like they belong. If you tie the cabinet into the floor structure you get a physical shaking which is great for movies! Also too much power is never enough when it comes to subs.
Not much different to building subwoofers into old brick chimneys.
I would if I could so go for it
I would if I could so go for it
Great responses, and I agree, we are probably all nuts here 🙂
The cult of the infinite baffle... I have been there already, but for another project I have in mind... I think this project here is a rather "normal" subwoofer, only that it's placed under the floor and needs to "blow" out somehow.
Doing a "slot loaded" subwoofer? Hmmm... isn't that sort of an open baffle thing, what Nelson Pass did once?
Right now I am thinking... just calculate the box, build it and make sure to have a row of heat vents at the end where the drivers are directed to.
And by the way, I thought about putting an air compressor in there too, even my dust collector. But the fact that it is a bit inaccessible stopped me from pursuing that idea.
P.S.: The inspiration link was also great, I wish I could hear that system!
The cult of the infinite baffle... I have been there already, but for another project I have in mind... I think this project here is a rather "normal" subwoofer, only that it's placed under the floor and needs to "blow" out somehow.
Doing a "slot loaded" subwoofer? Hmmm... isn't that sort of an open baffle thing, what Nelson Pass did once?
Right now I am thinking... just calculate the box, build it and make sure to have a row of heat vents at the end where the drivers are directed to.
And by the way, I thought about putting an air compressor in there too, even my dust collector. But the fact that it is a bit inaccessible stopped me from pursuing that idea.
P.S.: The inspiration link was also great, I wish I could hear that system!
Another thread with some variations on slot loading.
https://www.diyaudio.com/community/threads/slot-loaded-vs-sealed-subwoofer-table.403009/
https://www.diyaudio.com/community/threads/slot-loaded-vs-sealed-subwoofer-table.403009/
If you have the capability a great idea.
Do take advantage of push-push loading of the woofers to minimize vibration.nie take advantage of active reactioon force cancelation. Althou if th ebox is bricks or cinder blocka that may not be an issue.
dave
Do take advantage of push-push loading of the woofers to minimize vibration.nie take advantage of active reactioon force cancelation. Althou if th ebox is bricks or cinder blocka that may not be an issue.
dave
Can you bring the bench out from the wall?
Make up a shallow "box" just big enough to fit the drivers going from floor to ceiling, mount the drivers up as high as possible and just use the under floor volume as pure volume, fibreglass filled.
Cover the drivers with steel mesh etc
Make up a shallow "box" just big enough to fit the drivers going from floor to ceiling, mount the drivers up as high as possible and just use the under floor volume as pure volume, fibreglass filled.
Cover the drivers with steel mesh etc
You need to install flooring whatever way you go. So this work is on the cards.
I would si.ply use the walls and floor of your 'hole in the floor' as is.
I would consider either infinite baffle or bass refer tuned very low. Install a removable panel to allow access to The drivers. The idea of slot loading the drivers is good.
Watch cone excursion with IB and big/low tuned reflex loading. If forced, I would partition a smaller enclosure in there, but I am sure you can find some drivers that will reverse engineer into your opportunistic enclosure.
If I were you this would be irresistable🙂
I would si.ply use the walls and floor of your 'hole in the floor' as is.
I would consider either infinite baffle or bass refer tuned very low. Install a removable panel to allow access to The drivers. The idea of slot loading the drivers is good.
Watch cone excursion with IB and big/low tuned reflex loading. If forced, I would partition a smaller enclosure in there, but I am sure you can find some drivers that will reverse engineer into your opportunistic enclosure.
If I were you this would be irresistable🙂
This is not a good place to ask if you are nuts. We are certifiably nuts for the most part.
I would say yes, go do it!
Coming from someone with a pair of 18" woofers vented into a ceiling and love it.
I would say yes, go do it!
Coming from someone with a pair of 18" woofers vented into a ceiling and love it.