So, basically similar thinking is already implemented as much as possible with the cabinet:
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Sorry folks,
i was too fast and jumped over the whole middle part of the thread, my fault
the thread opener flipped the whole old chassis to new ones and use now a much better approach with the tweeter with a wave guide, all good
i was too fast and jumped over the whole middle part of the thread, my fault
Here is a mock up of the beveled front panel.
the thread opener flipped the whole old chassis to new ones and use now a much better approach with the tweeter with a wave guide, all good
I am close to finishing the cabinet mods and getting ready for set up. I will do a summary post here once I finish the cabinet. Still a few tricky parts to sort out. And then a whole new area to learn - crossovers, EQ, phase, directivity...
The woofers were absolutely ok and I have given them away on this forum. The tweeters were not so good and I have dented one accidentally, but both still can be used.
Step 1. The Hypex filter designer will let you dial in any desired delay to time align those drivers perfectly. Looking at the directivity, distortion, max SPL of the drivers at their low frequency limit and break up at the high end you can select the crossover frequencies. Step 2. I recommend using a Linkwitz transform (asymmetric second order shelf filter) to form half of a fourth order high pass filter for the tweeter and midrange. This is a really neat solution that is made possible using the DSP. The Linkwitz transform can be configured to produce a second order high pass with Q = .707 at the crossover frequency. Step 3. Then a second Q = 0.707 second order high pass filter is cascaded with it to produce the very effective Linkwitz Reilly fourth order crossover filter used by many designers. Using this method perfectly cancels the natural highpass roll off and phase response of the driver and produces a phase perfect LR 4th order crossover. I may be wrong, but I believe this method is my innovation as I've not seen it talked about else where. Step 4. Set the power limiting for each driver to make the system "party proof" so that guy holding the beer can't hurt anything.
Paint day, coat 2 today.
Considering this is my first attempt at spray painting, a windy day and my advanced paint shop, I give myself a 4 out of 5. I did not have any runs but I had a single droplet spit, fortunately on the back panel.
I hope I do not need coat 3.
Considering this is my first attempt at spray painting, a windy day and my advanced paint shop, I give myself a 4 out of 5. I did not have any runs but I had a single droplet spit, fortunately on the back panel.
I hope I do not need coat 3.
I also really like the power and ease of using Visaton Boxsim. In the full suite of plots is the maximum SPL graph that is very useful for matching drivers and setting crossover frequencies. When designing active speakers the efficiency practically does not matter, and you can focus on getting the desired maximum SPL capability dialed in across the frequency range.
@AlmaAtaKZ
a method to better fill the pores of the wood and close them from the first coat is to give a generous layer of quick epoxy transparent with a roller. at that point you sand and fill if there is to be filled, then the finishing coats. on the body of a guitar, after the epoxy, you sand and paint up to 7/9 finishing coats.
a method to better fill the pores of the wood and close them from the first coat is to give a generous layer of quick epoxy transparent with a roller. at that point you sand and fill if there is to be filled, then the finishing coats. on the body of a guitar, after the epoxy, you sand and paint up to 7/9 finishing coats.
A VituisCAD question (which I am still to learn): can I measure individual drivers in REW and then import the responses into VCAD and see the summed response, directivity index etc?
VituixCAD will certainly do that. It requires performing several steps in a certain order. If you have measurement from lots of angles that can be very powerful. The baffle response is done one driver at a time. There are some youTube videos that step through the software. I am a bit lazy and lean into boxsim as it does everything in one step anytime any parameter is changes. There is no sequence and no special intermediate files with required naming conventions. The downside is there is no way to add drivers to a library, so you build a project using Visaton drivers and then open each driver in the project and change the TS parameters or load the frequency sweep .frd file and the impedance sweep .zma . The off axis response is modeled using the driver diameter that it calculates when you enter the driver area S. The box and baffle are all easy to model.
The particular steps olsond3 mentioned have to do with simulating everything from a bare driver measurement (to include tracing manufacturer response curves).
In your case, if you measure your drivers in your enclosure, it's pretty straight foreword, all you need is the frequency response measurements.
Trial fit amps to back panels after amp box glueing and painting. All seems OK.
The amps are sunk into the back panels by about 10mm (through the top 12mm layer).
The amps are sunk into the back panels by about 10mm (through the top 12mm layer).
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