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Old 5th March 2013, 10:52 PM   #1511
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Thanks Joe. I have enough damping left so it will not be a problem to try getting lower this way. 20mm more on the port? I'm surprised that I can add as much considering the relatively short lenght of the port.
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Old 8th March 2013, 02:55 PM   #1512
jdkJake is offline jdkJake  United States
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Originally Posted by petefrontiers View Post
Thanks Joe. I have enough damping left so it will not be a problem to try getting lower this way. 20mm more on the port? I'm surprised that I can add as much considering the relatively short lenght of the port.
I added 15mm to mine to get the appropriate drop. You would be surprised how much you can add and how small the corresponding frequency drop that results.
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Old 8th March 2013, 05:34 PM   #1513
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Thumbs up Progress

Good to have some quality tools on site.....
We also made the chambre for the tweeter closed by a thinner lid.
Having fun...
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Old 8th March 2013, 05:42 PM   #1514
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Nice work. Makes my very modest clamp collection feel very inadequate !
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Old 8th March 2013, 05:45 PM   #1515
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Our Tweeter mounting cabinett hole and the submerged WG with the same outline as the mids and the bases......
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Old 8th March 2013, 05:47 PM   #1516
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Originally Posted by ermat1234 View Post
Nice work. Makes my very modest clamp collection feel very inadequate !
I did just happen to find the best carpenter and his site in the area. Nice guy, he help us on and of when we do stupid things, we pay for the time he spend and some minor sum for he letting us spend hours and hours there.... Really Nice
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Old 9th March 2013, 12:27 PM   #1517
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Originally Posted by jdkJake View Post
I added 15mm to mine to get the appropriate drop. You would be surprised how much you can add and how small the corresponding frequency drop that results.
I found an interesting study about the effect of port lenght and damping vs Fb. vent tuning
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Old 9th March 2013, 12:54 PM   #1518
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Very nice work Sharky and Sibbeli ! I'm curious to see your carbon fiber waveguide.
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Old 9th March 2013, 03:37 PM   #1519
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Played with damping and port lenght this morning. Adding damping did not lower Fb, obviously, I didn't add enough... Fb stayed at 35 Hz. I only changed the 25mm thick damping pieces at the front for 33mm thick pieces.

I added 20 mm to the port with tape and Fb got down to 33 Hz.
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Old 9th March 2013, 11:51 PM   #1520
jdkJake is offline jdkJake  United States
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Originally Posted by petefrontiers View Post
Played with damping and port lenght this morning. Adding damping did not lower Fb, obviously, I didn't add enough... Fb stayed at 35 Hz. I only changed the 25mm thick damping pieces at the front for 33mm thick pieces.

I added 20 mm to the port with tape and Fb got down to 33 Hz.
Do you like the sound better at that tuning?
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