| 3pi in 4pi cabinet? [message #71234] |
Sun, 05 February 2012 14:29  |
ecc83
Messages: 19
Registered: May 2009
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Chancellor |
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I would like to build the 3pi but the cabinet size is too big for my room.
Is it possible to build the 3pi into the 4pi enclosure without changing the crossover?
If it is not possible-how many percent can i decrease the cabinet size?
Thank you very much,
Frank
ps: i have 2 closed subwoofer to help for the bass...
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| Re: 3pi in 4pi cabinet? [message #71235 is a reply to message #71234] |
Sun, 05 February 2012 17:20  |
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Wayne Parham
Messages: 18789
Registered: January 2001
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Illuminati (33rd Degree) |
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They're very close in size:
three π: 30"x20"x14"
four π: 26"x18"x14"
Only four inches difference in height and two inches difference in width. Such a small difference, are you sure you can't "fit" the "larger" speakers in your room? I mean, they really seem to be the same size. If you stand them side-by-side, you can tell the difference but if you set a pair on stands, then replace them with the other pair, it will feel like there is absolutely no difference in size.
I would guess you could put the three π guts in a four π size cabinet and retune the port. Said another way, you could probably put the three π components in a 26"x18"x14" box tuned to 30Hz and it would be pretty much the same as the standard box, with maybe a smidge less bass extension. But the key thing here is "maybe". It hasn't been tested.
Why throw away all the hours of design/test and optimization work just to shave a couple inches off the box? It might work, but it might put a port in a standing wave pressure node and adversely affect the response. So honestly, I would suggest that you stick with the stock design. If you have a compelling enough reason to modify the design that you are willing to perform tests to verify the changes, then by all means, give it a go. But I wouldn't suggest doing it blindly.
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