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For some time now I have been wanting to replace my old 12" MTX HT sub that I've been using for about 15 years. It is the first and only HT sub I have ever purchased, though as a cheap P.O.S. it has served me surprisingly well. After watching the video shared in this thread, I really liked the design aesthetic of the walnut/fabric combo and decided to adopt it for my next sub. I started on the design about 8 months ago and shortly after choosing my components everything went out of stock! For a looooooong time. Fast forward to now and parts are back in stock (albeit more expensive....S#!^^%$#) so I snatched them up and resumed some modeling to finalize my plans. After a few threads seeking some help (which is always appreciated!) I have come up with the following...
Years ago I built a full set of Paul C's Swopes and this sub will be used along with them. I did not build those cabinets with the intention of ever putting grills on them and part of me wishes I had. While I like the look of the exposed drivers, my kids and their incessant need to touch, poke, drive Hot Wheels cars over everything has not been kind to them. That being the case I wanted to incorporate a grill over the sub driver to hide it and hopefully remove the temptation to destroy it
. My plan is to build the cabinet with a front firing driver and recess it into the baffle enough so that I can wrap a band of acoustic fabric horizontally around the box to create a grill and still leave room for the woofer to dance. I'll need to take some measurements but my initial estimate from Dayton's drawings and the rated Xmax is that I'll need to recess the woofer about 1" to be safe. That means the baffle is going to be quite beefy.
Here are the modeled graphs I have come up with so far...
Transfer Function:
Air Port Velocity:
The port velocity is a little high. I plan to use a down-firing port and in one of my help seeking threads it was mentioned that the use of a down-firing port will filter out any chuffing that may occur (Thanks billfitzmaurice).
Cone Excursion:
I added a 25Hz HP filter to tame the excursion that starts to get real nutty around 23Hz and slightly over Xmax between 32-37Hz. With the filter everything appears OK.
Next step is to put together some CAD drawings so I know what to cut. My plan is to do a substantial round-over (2") on the four vertical corners and then wrap the enclosure in a walnut veneer.
| Amp: | SPA250DSP |
| Subwoofer: | Dayton Audio RSS265HF-4 10" |
| Enclosure: | 3 cu^ft tuned to 26Hz |
| Port: | 4" Flared Precision Port @ 13.7" |
Years ago I built a full set of Paul C's Swopes and this sub will be used along with them. I did not build those cabinets with the intention of ever putting grills on them and part of me wishes I had. While I like the look of the exposed drivers, my kids and their incessant need to touch, poke, drive Hot Wheels cars over everything has not been kind to them. That being the case I wanted to incorporate a grill over the sub driver to hide it and hopefully remove the temptation to destroy it
. My plan is to build the cabinet with a front firing driver and recess it into the baffle enough so that I can wrap a band of acoustic fabric horizontally around the box to create a grill and still leave room for the woofer to dance. I'll need to take some measurements but my initial estimate from Dayton's drawings and the rated Xmax is that I'll need to recess the woofer about 1" to be safe. That means the baffle is going to be quite beefy.Here are the modeled graphs I have come up with so far...
Transfer Function:
Air Port Velocity:
The port velocity is a little high. I plan to use a down-firing port and in one of my help seeking threads it was mentioned that the use of a down-firing port will filter out any chuffing that may occur (Thanks billfitzmaurice).
Cone Excursion:
I added a 25Hz HP filter to tame the excursion that starts to get real nutty around 23Hz and slightly over Xmax between 32-37Hz. With the filter everything appears OK.
Next step is to put together some CAD drawings so I know what to cut. My plan is to do a substantial round-over (2") on the four vertical corners and then wrap the enclosure in a walnut veneer.
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