B&C 18SW115 enclosure design |
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Speaker Sol
Young Croc Joined: 15 September 2009 Location: Ireland Status: Offline Points: 1320 |
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Very nice. |
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Crashpc
Registered User Joined: 26 February 2008 Location: Czech Republic Status: Offline Points: 463 |
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Here is my 18SW115 (135l, 34Hz). Does good job, but will be replaced by 21DS115.
Today I got it past Xmax for a while (16,5mm), and even under tuning, it can do a lot, while staying quiet in terms of port or cone noises. It did very quiet friction hissing noises around the surround and wires, so if it played some real sound, it would not be noticable except for distortion of the sound if any. Awesome driver, really. Hope 21DS115 gets me even further. |
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Nikon and Canon people should not be married to each other. Why did you let this happen?
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smitske96
Young Croc Joined: 16 February 2016 Location: The Netherlands Status: Offline Points: 1085 |
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@Crashpc
Nice! At the moment I'm making some sketches for the mid/highs. 30L Net (I know that's small) but I'm gonna try the 12NW76.
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Crashpc
Registered User Joined: 26 February 2008 Location: Czech Republic Status: Offline Points: 463 |
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Yeah, I'm pretty sure 21" will be absolute "solution" for me for a while.
I'm thinking about larger tops too. Maybe 10NW64, but with some slightly larger horn for high tone drivers, and I cannot figure out how to make it compact enaugh for PC table. |
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Nikon and Canon people should not be married to each other. Why did you let this happen?
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osse
Registered User Joined: 26 August 2013 Location: Sverige Status: Offline Points: 84 |
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Very interesting system, I have a pair of 18sw115 loaded keystones which are great but I wonder how much you win compared to a small BR cab like yours with close to the same -3dB. Would be interesting to hear your plans for the 21ds115 and 12nw76. I've been looking at the 12nw76 driver and got particularly interested in it when I saw the BR top cab b&c has suggested on their site using it, very strong above 100 |
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smitske96
Young Croc Joined: 16 February 2016 Location: The Netherlands Status: Offline Points: 1085 |
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I've read that a (good designed) TH will win 6dB over a single reflex enclosure with the same driver.
I'm also very curious towards the 12NW76, they have to reach 80/90 Hz. The current design I have for the 12NW76 is tuned at 70 Hz with 30 L Net volume.
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Crashpc
Registered User Joined: 26 February 2008 Location: Czech Republic Status: Offline Points: 463 |
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Smitske96:
It's not because of you saying it, but I absolutely hate that claim. There are few threads on diyaudo, one is even called "case study" about TH being 6db louder. That is very misleading generalization. It only works for certain bandwith without box volume comparison. I.E. per driver maximum performance. But once you check with box volume suited for BR box, and frequency bandwith, TH really doesn't run anywhere. So one should make his choice carefully. Th also has specific colour and distortions. Distinctively different than BR. Generally lower, but again, not across the whole bandwith. I like BR boxes more because of that... |
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Nikon and Canon people should not be married to each other. Why did you let this happen?
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smitske96
Young Croc Joined: 16 February 2016 Location: The Netherlands Status: Offline Points: 1085 |
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Ofcourse there are some compromises to be made! But if you would build a cab tuned to 35 Hz, the volume would still be 200 L +-. So a real comparison would be, a cab tuned to 35 Hz with the 18sw115. If the BR cab would come on top in sound quality that's just a + for the BR. If the TH could outrun the BR in SPL that would be a + on the TH.
Just to be clear, my comparison is made to a BR cab tuned to 35Hz (approximately). And I am very interested to do a comparison with a BR cab with the same tuning.
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MarjanM
Old Croc Joined: 10 February 2005 Location: Macedonia Status: Offline Points: 7810 |
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I did compared a double 18 reflex with internal volume of 450lit and tuned to 37hz to a TH single 18 with the same driver.
The double 18 stomped the TH is every aspect possible. But it does need double the power.
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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What were size/weight differences? |
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MarjanM
Old Croc Joined: 10 February 2005 Location: Macedonia Status: Offline Points: 7810 |
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The 218 is 1160x580x780, 88kg.
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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Crashpc
Registered User Joined: 26 February 2008 Location: Czech Republic Status: Offline Points: 463 |
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Nikon and Canon people should not be married to each other. Why did you let this happen?
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