| Studio 2 Pi cabinet construction questions [message #36814] |
Sun, 09 June 2002 05:11  |
Edwin
Messages: 50
Registered: May 2009
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Baron |
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To Wayne and the rest of the guys,
I found a cabinet maker who will make the cabinets for me. I opted for mahogany. In line of this, I have the following questions:
1. As this is my first time in speaker building will I have any problems installing damping materials, drivers, wirings etc. in a finished cabinet? Or do I have to install everything inside before I close the back?
2. Does the Studio 2 Pi require bracings? If so, how?
3. What is the size of the connector panel hole? Is the 2.875" wide X 2.175" tall true for all connector panels included in the kit?
4. Also will changing my dimensions to 30.5" X 14" X 8", which has the same volume of 1.36 cu.ft. compared with the original dimension of 22" X 15" X 10" pose a problem?
5. Other suggestions or modification
Thank you for your patience in answering a newbie like me. I hope to build a 4Pi if this initial project succeeds :-)
Edwin
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| Re: MDF better than mahogany [message #36821 is a reply to message #36820] |
Sun, 09 June 2002 17:50  |
Adam
Messages: 419
Registered: May 2009
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Illuminati (1st Degree) |
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I'm not sure about your other questions, I guess I'll let Wayne cover that, but as far as standing waves go, they only happen at higher frequencies. Standing waves will begin to occur at the frequency whose wavelength is equal to the longest dimension of your box. So in your case, 22.5", which is a frequency of 603 Hz. Obviously well above your crossover point, so you don't have to worry about them! Standing waves only become a problem when the speaker is playing frequencies which are close to or above this threshold. So they will only be a problem with woofers running up to high frequencies or woofer enclosures that are absolutely humongous. Adam
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| Standing waves and resonance [message #36822 is a reply to message #36821] |
Sun, 09 June 2002 19:00 |
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Wayne Parham
Messages: 18845
Registered: January 2001
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Illuminati (33rd Degree) |
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The reason that particle boards and laminates are preferred for building loudspeakers is that they have several different fibers that are oriented in different directions. So the cabinet panels are less prone to resonance. About subs, Adam was right. Standing waves are as much an issue for subs as anything else, but they are used at frequencies where wavelength scale is measured in feet. If your cabinet were several feet across then standing waves might set up but when crossed over in the double digits, small cabinets like you've described are nowhere near large enough for modal behavior to occur.
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