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The other reason for a smaller chamber was to keep the physical size smaller with the box being 8in x 14 in x 5in tall. I checked in the model and a 9 liter rear chamber provides a 97dB at 2.83v and 1m sensitivity and about 103Hz as the -3dB point. The sealed rear chambers may just be a simple box, but it took almost as long to cut and assemble as the tractrix horn (lots of cuts whereas the horn was two panels and a top and bottom sheet)! I ended up reducing the volume down to about 9 liters for more bass punch at expense of extension.
3.5mm audio solidworks 2014 download update#
Update Sept 3, 2014: the tractrix fullrange Synergy is completed and it sounds wonderful! See post 13. Let's see if a point source synergy speaker can be built for $40 and if it sounds good.
3.5mm audio solidworks 2014 download install#
I still need to install the rear sealed chamber and get a measurement with the woofers on.
3.5mm audio solidworks 2014 download how to#
If you need tips on how to do this, check out the "Cheap and FAST OB, Literally" thread. If you have a miniDSP 2x4 and a couple of amps you are set. Note that you will need active EQ and bi-amping to make this work. 1 dual banana post binding terminal $1 ( Edit: technically $3 now with qnty 3 binding posts) 1 tube of latex caulking for the constrained layer damping $2 (n.b., DO NOT use Liquid Nails - as the solvent vapors will melt the foam in the foam core!)
3.5mm audio solidworks 2014 download driver#
Qnty 4 Parts Express buyout 6.5 in polycone woofers (same driver as used in ther well-regarded B652 speakers) $5 ea x 4 = $20 With some DSP EQ'ing I was able to get the following response from the little Vifa: Originally designed with the Faital Pro 3FE25 in mid, I stuck a Vifa TC9FD in it for grins. I then scaled that horn down to 0.70x for a 400Hz 20in wide x 12in tall x 15in deep tractrix. The idea for this speaker came from a large 300Hz 28in wide x 17in tall x 22in deep tractrix horn driven by a full range driver. Here is the cut/glue plan for the flat top and bottom panels on post 175: Glue the throat section first, then the mouth, then the middle. For the 0.70x case, the throat is 2.0 in square and the mouth is 20 in wide and horn is 15.3 in deep.
This pattern, once cut onto foam core (scored with parallel cuts every 3 to 5 mm on on the concave side) self-formed into the tractrix profile when enforcing the mechanical mates of the mouth, throat, and edge boundary conditions via hot melt glue to the top and bottom panels. I then fitted the curve with a two-point spline in Solidworks, then made a 3d model using the lofting tool, then I unrolled the curved shape to a flat 2d pattern using the sheet metal "flatten" tool. I then took the dimensions from every inch of axial distance and plotted the curve for the horn profile. The spreadsheet as I used it to build my horns is on post 90 here The 1.0x scale tractrix horn design was calculated using Volvotreter's tractrix spreadsheet using a 2.78in square throat and a 175Hz flare frequency. This speaker spun-off from the PRV 5MR450-NDY thread here: Īnd is sufficiently OT from the main thread which deals with the PRV driver and a FAST implementation that I think it deserves its own thread. Presenting the Trynergy - a full range tractrix synergy.
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