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7th May 2011, 06:43 AM
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#1 |
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diyAudio Member
Join Date: Feb 2008
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rectangular - round port?
as per this rough drawing.
will this effect tuning much/at all? should I be worried? has anyone actually done something like this?! its drawn with one side missing so you can see whats going on, area of the rectangular section is the same as the round section  
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7th May 2011, 12:05 PM
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#2 |
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diyAudio Member
Join Date: Feb 2011
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it will be unpredictable, but nothing what a DMM and a bit of effort can not sort out.
search a bit around, you will find how to mesure the tuned freqvency once the box is done and speaker is installed, then you can make your changes to alter the tuning (cut the lenght a bit, re-mesure, and repeat until its good). any wierdoo formation can be used, it just takes more time and effort. not sure about rezonances in a setup such as that, but i would figure it does not realy count in this case. |
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7th May 2011, 01:19 PM
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#3 |
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diyAudio Member
Join Date: Jun 2002
Location: USA, MN
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where does the round part go? why make it round at all?
__________________
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan Science is a way of thinking much more than it is a body of knowledge. --Carl Sagan |
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7th May 2011, 01:22 PM
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#4 | |
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diyAudio Member
Join Date: Feb 2008
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Quote:
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7th May 2011, 04:53 PM
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#5 |
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diyAudio Member
Join Date: Jun 2002
Location: USA, MN
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That port is probably big enough that you won't have issues with chuffing
Best to run a sim, though.
__________________
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan Science is a way of thinking much more than it is a body of knowledge. --Carl Sagan |
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8th May 2011, 12:46 AM
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#6 |
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diyAudio Member
Join Date: Feb 2008
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its 280mm diameter, 616cm^ for four 12inch subs.
4th order bandpass. but now I've realised that in my intended box design, the port only needs to be 9.8cm long... |
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25th August 2011, 11:53 PM
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#7 |
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diyAudio Member
Join Date: Feb 2008
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so much has happened since I started this thread
 maybe I'll some (a lot) of pics... actually, I might start a new thread in the correct area... |
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25th August 2011, 11:57 PM
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#8 |
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diyAudio Member
Join Date: Feb 2008
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