Big Or Small
Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=4650
Printed Date: July 21, 2025 at 12:18 AM
Topic: Big Or Small
Posted By: 91blaze
Subject: Big Or Small
Date Posted: October 20, 2002 at 1:34 PM
i searched and couldnt find any answers so here it is. what will produce more spl: a small sealed box or a large sealed box? and please list why. im in a forum argument over this topic. thanks for you replies.
Replies:
Posted By: Velocity Motors
Date Posted: October 20, 2002 at 4:10 PM
The box size and SPL is dependent on the subwoofer being used. Some subwoofers require a small enclosure to perform to it's optimum SPL while other's require a larger enclosure. Most of the time if you wish for SPL you do not use a sealed enclosure as this type of enclosure robs 3 bd from your system. For arguments sake I would not choose neither because both enclosures do not produce good SPL  . ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: TheRapture
Date Posted: October 21, 2002 at 1:14 PM
exactly... a selaed box is made for sound quality not SPL... you'll of course want to go with a ported box for any type of SPL. and when using a ported box usually the larger the box tuned to a higher frequency (maybe 48hz) will produce more SPL.
Posted By: 91blaze
Date Posted: October 21, 2002 at 2:44 PM
im only refering to sealed boxes.
Posted By: TheRapture
Date Posted: October 21, 2002 at 3:00 PM
your question is as follows... it's like blowing up a ballon, sealing the end of it... and expecting it to blow air out.... but out of what seeing as though the end is sealed? is this a riddle? damn well better not be! haaaahahhaa
Posted By: NyxBass
Date Posted: October 21, 2002 at 5:02 PM
For the sake of what you're asking, generally a smaller sealed box can be louder. Why? A smaller box will be tuned higher, allowing the speaker to be pushed harder (less air = more acoustic suspension). But, the trade off is a much more "peaky" response (not as flat). It all really does depend on the speaker involved, but a smaller box generally has the possibility of a higher SPL.
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/NyxBass
Posted By: AW1208Q
Date Posted: October 22, 2002 at 9:22 AM
SPL stands for sound pressure level. which you will not get out of a sealed box. you want to move as much air as possible into the cab of the car/truck/van, to do that you have to have a ported box. sealed boxes are for SQ not SPL.
Posted By: 91blaze
Date Posted: October 22, 2002 at 9:26 AM
Quote: Originally posted by AW1208Q on October 22, 2002
SPL stands for sound pressure level. which you will not get out of a sealed box. you want to move as much air as possible into the cab of the car/truck/van, to do that you have to have a ported box. sealed boxes are for SQ not SPL.
did you not read this whole thread? i think we all know what spl stands for. the ported box being louder has already been discussed. you dont HAVE to have a ported box to get an spl reading. the question was: which is louder big sealed or small sealed?
Posted By: Velocity Motors
Date Posted: October 22, 2002 at 9:44 AM
Hey 91blaze, another thing that I thought about to add to your side of the argument is that a larger sealed box would NOT have a higher SPL because the sub would bottom out sooner than that of a smaller enclosure because it would not be able to go down as low in frequency. A good example is yelling into a large room compared to yelling into closet. The larger room will have time for the frequency to mature, but no SPL.
-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
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