Hi xrk971 and Beat Street,
I agree, the dual 10" is going to be the ticket for the available volume, and X already has the design for it. I'll mess around a little more w/ the dual 12", but the box is not magically going to get bigger. Beat Street initially had the dimensions @ 14x18x42 (Post #1), if that could be 15x18x42(44?) that would make a big difference, also: the exterior walls that are also port walls can be build from 1/2", so there is a little volume there.
References:
Post #28: "XKi with dual Alpine SWR12D2's: The Alpine is a sweet driver for the XKi, it achieves extreme cone control and your max SPL will be thermally limited and port compression limited, not xmax limited. Here is a sim for two drivers (each wired in series and the pair in parallel for 2 ohm nominal load overall). The design is slightly modified with a smaller volume of 120 liters for the total volume or 90 liters for rear chamber and 30 liters for front. The vent is now 12.5in high x 1.5in wide x 29in long. The K-aperture on the exit remains the same. You may need to add a hairpin fold to fit a 29in long vent on either side."
Post #38: "Tb46 would 15x40x15 be enough volume for the original size vent size 12.5in high x 1.5in wide x 29in long.If not you can draw it 15x42-44x15."
Post #39: "The XKi has wraparound vents on the ends of the box. The front chamber volume is half of rear chamber volume...Maybe dual 10 in SWR's are in order..."
Regards,
I agree, the dual 10" is going to be the ticket for the available volume, and X already has the design for it. I'll mess around a little more w/ the dual 12", but the box is not magically going to get bigger. Beat Street initially had the dimensions @ 14x18x42 (Post #1), if that could be 15x18x42(44?) that would make a big difference, also: the exterior walls that are also port walls can be build from 1/2", so there is a little volume there.
References:
Post #28: "XKi with dual Alpine SWR12D2's: The Alpine is a sweet driver for the XKi, it achieves extreme cone control and your max SPL will be thermally limited and port compression limited, not xmax limited. Here is a sim for two drivers (each wired in series and the pair in parallel for 2 ohm nominal load overall). The design is slightly modified with a smaller volume of 120 liters for the total volume or 90 liters for rear chamber and 30 liters for front. The vent is now 12.5in high x 1.5in wide x 29in long. The K-aperture on the exit remains the same. You may need to add a hairpin fold to fit a 29in long vent on either side."
Post #38: "Tb46 would 15x40x15 be enough volume for the original size vent size 12.5in high x 1.5in wide x 29in long.If not you can draw it 15x42-44x15."
Post #39: "The XKi has wraparound vents on the ends of the box. The front chamber volume is half of rear chamber volume...Maybe dual 10 in SWR's are in order..."
Regards,
Attachments
The sims for the SWS10D4 XKi are here:
http://www.diyaudio.com/forums/subwoofers/259509-new-sub-design-constricted-transflex-simple-build-series-tuned-6th-order-108.html#post4223469
125dB max SPL and -3dB at 35Hz.
http://www.diyaudio.com/forums/subwoofers/259509-new-sub-design-constricted-transflex-simple-build-series-tuned-6th-order-108.html#post4223469
125dB max SPL and -3dB at 35Hz.
Hi Y'all,
Yes, that will do it:
Here is the modified drawing, using 18"x15"x42" for the external dimensions. I get about 90L rear chamber, and 30L front chamber. I used the 1.5625x13.5625"x29"duct w/ a center divider for bracing. The top and bottom boards are 3/4" (23/32") material, and the rest 1/2" (15/32"). The baffle board has two layers of 1/2", and the woofers are recessed as shown.
Check the numbers, and let me know if this will work as drawn.
Regards,
Yes, that will do it:
Here is the modified drawing, using 18"x15"x42" for the external dimensions. I get about 90L rear chamber, and 30L front chamber. I used the 1.5625x13.5625"x29"duct w/ a center divider for bracing. The top and bottom boards are 3/4" (23/32") material, and the rest 1/2" (15/32"). The baffle board has two layers of 1/2", and the woofers are recessed as shown.
Check the numbers, and let me know if this will work as drawn.
Regards,
Tb46 nice work, is there enough space to flip / reverse one of the drivers to let it become pushpull.
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Hi Beat Street,
The driver w/ the back out will be sticking a bit over 2" out of the box. Hopefully, xrk971 will approve the drawing, and then I'll add all the other dimensions for your woodworking. 🙂 If you rotate the drivers until the driver fits your chamber volume ratios are all messed up. Sorry
Regards,
The driver w/ the back out will be sticking a bit over 2" out of the box. Hopefully, xrk971 will approve the drawing, and then I'll add all the other dimensions for your woodworking. 🙂 If you rotate the drivers until the driver fits your chamber volume ratios are all messed up. Sorry
Regards,
Hi Beat Street,
I ended up w/ a bit of extra time waiting, waiting.....so I finished the drawing w/ a cutsheet. I may not have any extra time for a while, so here it is:
Regards,
I ended up w/ a bit of extra time waiting, waiting.....so I finished the drawing w/ a cutsheet. I may not have any extra time for a while, so here it is:
Regards,
Tb46 thanks for the drawing can you make the print a little bigger its bit hard for me to see.
Sorry Incould not get back to you sooner - it looks very good. It looks like there is a divider panel between left and right sides. I would cut holes in that to allow flow between left and right sides to equalize. It is needed as bracing I assume. The volumes and vents look good. You may need internal bracing on front aperture as there is a lot of pressure there for half in ply. Maybe dowels screwed in a few strategic places is good.
Hi xrk971 and Beat Street,
Yes, I agree w/ all the comments, additional stiffeners may also be used between the top and the bottom. Just stuff to work out during construction.
Attached is the drawing in pieces, that should make the writing larger in the pdfs.
Regards,
Yes, I agree w/ all the comments, additional stiffeners may also be used between the top and the bottom. Just stuff to work out during construction.
Attached is the drawing in pieces, that should make the writing larger in the pdfs.
Regards,
Hi Y'all,
As xrk971 had already done the design, and I had almost finished the drawing I think this might be as good a place as any to add the drawing for the Dual Alpine SWS 10D4 Karlflex xki. Enjoy! 🙂
Regards,
As xrk971 had already done the design, and I had almost finished the drawing I think this might be as good a place as any to add the drawing for the Dual Alpine SWS 10D4 Karlflex xki. Enjoy! 🙂
Regards,
Tb46 can you provide the measurement for the black lines in the picture and the front baffle with the Diamond shape.
I am so grateful for everyone help.
I am so grateful for everyone help.
Hi Beat Street,
I was not certain about the size of the aperture, then I found that xrk971 is keeping it the same size as before w/ the LAB12s (hope I have that correct).
S_aperture=150in^2
All the dimensions you are looking for are either in the drawing directly, implied, or as a resultant, but here it is anyhow. You need to start w/ cutting the top and bottom pieces, and drawing the divider board locations very carefully. If you have any more questions: shoot. 🙂
Regards,
I was not certain about the size of the aperture, then I found that xrk971 is keeping it the same size as before w/ the LAB12s (hope I have that correct).
S_aperture=150in^2
All the dimensions you are looking for are either in the drawing directly, implied, or as a resultant, but here it is anyhow. You need to start w/ cutting the top and bottom pieces, and drawing the divider board locations very carefully. If you have any more questions: shoot. 🙂
Regards,
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