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Old 22nd January 2013, 02:41 PM   #411
Taco is offline Taco  Netherlands
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Very interesting read! Those cabinets are finished very very well, it almost makes the woofers look cheap...

You can also make a white cabinet, that should solve the color mismatch
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Old 22nd January 2013, 03:42 PM   #412
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I do not know if the finished cabinets will ever be available. They are mainly done for a presentation. I can try to make them available in MDF for DIY finishing.
The last days i have put the drivers into the DIY cabinet version and have made a new crossover. I had a bug in my impedance measurements so the coil before the woofer comes out with a bigger value. Thanks Jeff for alerting me.
I will publish two versions. One has a maximum null when i reverse one driver. The other is made for maximum flatness.
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Old 22nd January 2013, 05:49 PM   #413
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Here is the new crossover for the cabinet in post 363. The woofer is the 4 Ohm version.
I can make the response even flatter but then i do not get that sharp null when i do the tweeter in phase. On the other hand this is already very decent so it is close to the final tuning.
Attached Files
File Type: pdf Satori Mon DIY 1.0 FRD.pdf (16.8 KB, 506 views)
File Type: pdf Satori Mon DIY 1.0 FRD null.pdf (17.0 KB, 308 views)
File Type: pdf Satori Mon DIY 1.0 individual phase.pdf (12.9 KB, 188 views)
File Type: pdf Satori Mon DIY 1.0 crossover bass.pdf (9.5 KB, 439 views)
File Type: pdf Satori Mon DIY 1.0 crossover treble.pdf (9.6 KB, 361 views)
File Type: pdf Satori Mon DIY 1.0 group delay.pdf (13.0 KB, 142 views)
File Type: pdf Satori Mon DIY 1.0 step.pdf (12.6 KB, 161 views)
File Type: pdf Satori Mon DIY 1.0 etc.pdf (11.4 KB, 135 views)
File Type: pdf Satori Mon DIY 1.0 input impedance.pdf (17.8 KB, 160 views)
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Old 22nd January 2013, 06:51 PM   #414
gornir is offline gornir  Sweden
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Quote:
Originally Posted by Joachim Gerhard View Post
Here is the new crossover for the cabinet in post 363. The woofer is the 4 Ohm version.
I can make the response even flatter but then i do not get that sharp null when i do the tweeter in phase. On the other hand this is already very decent so it is close to the final tuning.

Nice phase tracking and the "BSC" is handled effectively with the large coil and the wide baffle, but gives a rather low cross-over frequency, 1.6-1.7kHz?

Even though the cross-over is very simple it would require a fair amount of components to achieve the cross-over values.

Looking forward to listening impressions and measurements.

/Göran
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Old 22nd January 2013, 08:12 PM   #415
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Mundorf makes me custom coils and the rest can be done by paralleling, no big deal.
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Old 22nd January 2013, 08:17 PM   #416
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The tweeter has a lot of amplitude in the lower reaches because of the wide baffle. I think suppression of low frequencies is enough even with this low crossover.
Modern tweeters are surprising robust anyway. I use low crossover frequencies on many commercial designs i made and a broken tweeter is extremely rare.
The low crossover has some advantages, mainly better off axis response with little suckout in the crossover region.
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Old 22nd January 2013, 09:13 PM   #417
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Nice job on the xovers there. Simple yet effective, there's not much more to ask for. Subjectively it will be interesting to see whether or not the system sounds better at high volumes with the 4th order system, rather than the second. You sure are pushing that tweeter hard with the low and shallow slope, but this is part of what you're paying for when you go for a big bucks tweeter, a clean lower end with more usable output.
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Old 22nd January 2013, 09:29 PM   #418
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A 4th order can be made too. The only problem i have with this is the higher parts count that will or will not degrade detail resolution.
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Old 22nd January 2013, 09:37 PM   #419
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Indeed that's half of the problem with wide-band drivers as I'm sure both would probably require at least 3rd order electrical to bend them into 4th order target slopes at a similar frequency. In this regard these drivers and the sloping cabinet, almost seem perfectly suited to 2nd order slopes, but then that was the plan all along
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Old 22nd January 2013, 09:47 PM   #420
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Sure, i will make a 4th order alternative nevertheless.
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