Felix_F
Stunt Coordinator
- Joined
- Apr 22, 2004
- Messages
- 85
Here is how an alcove in our family room was made into a subwoofer using a pair of 18" Dayton drivers:
Half the walls in the alcove are either cinderblock or concrete. The rest of the walls were lined with plywood for extra strength, and a false ceiling was built that also served as a support for the baffle. I lined the non-cinder surfaces with vibration damping material from PE in hopes of minimizing the enclosure's vibrations being transmitted to the upstairs. All the inside and outside seams were filled with Mortite and then sealed again with weather stripping tape. It took ~180' of rope calk to make the alcove air-tight.
I built some cage-like structures out of chicken wire to hold the stuffing in accordance with MLTL design parameters:
http://www.quarter-wave.com/index.html
Here you can see the plywood part of the baffle braced by 2x8's with the drivers installed. Right under it lies the MDF part of the baffle which was glued and screwed into the plywood once the latter was installed in the alcove.
Here she sits in all of her unfinished glory. A 4" deep port is fitted in the pic, but after a little listening, I popped in a 18" deep version. How does it sound? Well, keep in mind that it's virtually uncalibrated. I'll pay with some test tones and my SPL meter tomorrow, play some music, etc and get a better baseline. All that said, the performance is literally frightening. My wife jumped during the big battle scene in LOTR ROTK. I felt my intestines move. Really. We're hearing the house make noises we've never heard before.
I wired each driver to its own set of binding posts. This way, they can either be configured to run in series or in parallel, or each woofer can be driven by a separate channel.
Tomorrow, or the next day, I'm going to paint black the grill frame pictured above and upholster it with some nice, gray grill cloth at got at PE. It should look good in the room once everything gets back to normal.
Other than the need to touch-uppaint the walls due to the damage sustained while fitting the baffle, the project is finished.
I kinda like the way the sub looks without the grill. With small children and a couple of cats in the house, the grid over the port is mandatory.
Felix
Half the walls in the alcove are either cinderblock or concrete. The rest of the walls were lined with plywood for extra strength, and a false ceiling was built that also served as a support for the baffle. I lined the non-cinder surfaces with vibration damping material from PE in hopes of minimizing the enclosure's vibrations being transmitted to the upstairs. All the inside and outside seams were filled with Mortite and then sealed again with weather stripping tape. It took ~180' of rope calk to make the alcove air-tight.
I built some cage-like structures out of chicken wire to hold the stuffing in accordance with MLTL design parameters:
http://www.quarter-wave.com/index.html
Here you can see the plywood part of the baffle braced by 2x8's with the drivers installed. Right under it lies the MDF part of the baffle which was glued and screwed into the plywood once the latter was installed in the alcove.
Here she sits in all of her unfinished glory. A 4" deep port is fitted in the pic, but after a little listening, I popped in a 18" deep version. How does it sound? Well, keep in mind that it's virtually uncalibrated. I'll pay with some test tones and my SPL meter tomorrow, play some music, etc and get a better baseline. All that said, the performance is literally frightening. My wife jumped during the big battle scene in LOTR ROTK. I felt my intestines move. Really. We're hearing the house make noises we've never heard before.
I wired each driver to its own set of binding posts. This way, they can either be configured to run in series or in parallel, or each woofer can be driven by a separate channel.
Tomorrow, or the next day, I'm going to paint black the grill frame pictured above and upholster it with some nice, gray grill cloth at got at PE. It should look good in the room once everything gets back to normal.
Other than the need to touch-uppaint the walls due to the damage sustained while fitting the baffle, the project is finished.
I kinda like the way the sub looks without the grill. With small children and a couple of cats in the house, the grid over the port is mandatory.
Felix