Will the shape of a sealed box change the SPL or SQ?
03-12-2009, 04:58 PM
#1
0 Watt CAFz'r
Thread Starter
Join Date: Mar 2009
Posts: 20
Will the shape of a sealed box change the SPL or SQ?
Hello everyone, this is my first post. It's probably been asked and answered a million times but I couldn't find a concrete answer on this forum or on the internet in general. I know that the volume is critical for proper performance but I don't know if the shape would make a difference. Some say it does, some say it doesn’t. Apparently there is a big argument over this; some saying a perfect cube is the worst speaker enclosure? I want to build a little sealed enclosure for a 10" pioneer and I'd like to know if the shape of the box would alter the SPL or SQ in any way.
03-12-2009, 06:45 PM
#3
Yankee
Join Date: Oct 2003
Posts: 3,599
no arguement really
large areas that reflect sound back onto the rear of a speaker is not going to improve the speakers performance, you should be able to hear it with a large flat surface one note will be emphasised over all others in that speakers range. This is why it is important to design an enclosure properly and to treat the inside to address 'standing waves'.
Not really that big a deal for a subwoofer though as the wavelength of the frequencies produced are so long. I would be more concerned with a lot of other things more than that in car audio but if you are a perfectionist... my box has no parallel surfaces.
large areas that reflect sound back onto the rear of a speaker is not going to improve the speakers performance, you should be able to hear it with a large flat surface one note will be emphasised over all others in that speakers range. This is why it is important to design an enclosure properly and to treat the inside to address 'standing waves'.
Not really that big a deal for a subwoofer though as the wavelength of the frequencies produced are so long. I would be more concerned with a lot of other things more than that in car audio but if you are a perfectionist... my box has no parallel surfaces.
Last edited by JohnVroom; 03-12-2009 at 06:48 PM.
03-13-2009, 06:20 AM
#6
50 Watt CAFz'r
Join Date: Jan 2008
Posts: 58
Some people argue that standing waves can also have a hand in higher levels of distortion as well. A perfect cube will reflect sound inside itself very reliably compared to something that is really oddly shaped, or has a lot of curves or braces, which is one reason some people really like fiber glass boxes.
