QB3 or not QB3
- Thread starter U130421
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Any free simulator to suggest? If I was bass reflex designer , I would have ended knowing by heart ,what ratios does different alignments do decrease the F-3.Thanks
I use Unibox or Scan-Speak Toolbox but there are many good free softwares available.
There are many alignments with different F3, you don't need to stick to textbook alignments, F6 or F10 usually are more relevant if you use the speakers in a normal living room, mainly because of room gain.
Toolbox – Scan-Speak A/S
There are many alignments with different F3, you don't need to stick to textbook alignments, F6 or F10 usually are more relevant if you use the speakers in a normal living room, mainly because of room gain.
Toolbox – Scan-Speak A/S
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I found the most serious DIY QB3 design/built. the Monitor 2
The curves bellow show what was simulated and what the real result is .
(Let me laugh a little bit)
Can someone estimate from both curves ,what would be if the duct is closed.
The curves bellow show what was simulated and what the real result is .
(Let me laugh a little bit)
Can someone estimate from both curves ,what would be if the duct is closed.
Attachments
The measured response is near-field for the midrange unit, not the woofer. It will definitely not match the box sim of the woofer.
Woofer measurements are a mix of farfield and close-mic, spliced at about 200Hz. That measurement is not presented on that page.
I assume a CA26 in a 70L sealed box will have F3 around 55Hz. This is without a simulator at hand, just a rough estimation.
Woofer measurements are a mix of farfield and close-mic, spliced at about 200Hz. That measurement is not presented on that page.
I assume a CA26 in a 70L sealed box will have F3 around 55Hz. This is without a simulator at hand, just a rough estimation.
The picture description clearly states that it "Follows the near field frequency band of the Audiotechnology C-Quence15h without filter."
Am I wrong in understanding this somehow?
And yes, depending on where and how steep you cross, you can get output down to 80Hz, even lower, from a midrange unit. I'm crossing a Satori MW13P at 220 Hz with a 12dB slope and there is output down to 60Hz.
Am I wrong in understanding this somehow?
And yes, depending on where and how steep you cross, you can get output down to 80Hz, even lower, from a midrange unit. I'm crossing a Satori MW13P at 220 Hz with a 12dB slope and there is output down to 60Hz.
