I do it a little different. I use the GUI tool in HFD to manually input filter values rather than upload the biquad data. The filter values are determined by VituixCad simulation.
I print a hardcopy of the Vcad filter image, then as I enter the values into HFD, I mark off the values on the paper copy. Then I double check all the values. A 3-way filter usually takes about 10 minutes to input into HFD.
Directly uploading the biquad data is an interesting option. I may try it sometime to see if it is more efficient.
This is an important point he made. The behavior of active filters in VituixCad can be quite different than expected if the wrong DSP system is chosen. My installation of VituixCad defaults to "analog". Sometimes I forget to change the DSP system in the options screen from "analog" to "Hypex FA192K". The behavior of shelf filters is very different between the two. PEQ and HP / LP filters are onlys slightly different.
Hit another hurdle today. When trying to cut angled bevels for the front panel using test pieces we could not achieve perfectly straight lines. I think the jig was not done properly. Will rethink and try again.
Threaded inserts for the amp box:
Thought it was risky to drill 6mm dia into the edge of a 12mm mdf, but it worked well. Alignment was perfect.
Thought it was risky to drill 6mm dia into the edge of a 12mm mdf, but it worked well. Alignment was perfect.
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A lot of progress this week:
- Partition and main braces are in
- All mounting holes drilled and threaded inserts are in
- internal surfaces primed with PVA
And my master builder has figured out how to cut tapered bevels. Jig and all. Unfortunately, I was not present during that operation.
We were trying to follow the guide from @hifijim so this must be a variation on that method.
We were trying to follow the guide from @hifijim so this must be a variation on that method.
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The back panel will be fixed using about 30 M4 bolts with cap heads, into threaded inserts in walls and bracing. 2mm neoprene gasket throughout.
