Box design question
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=40668
Printed Date: May 16, 2024 at 3:49 AM
Topic: Box design question
Posted By: zolron
Subject: Box design question
Date Posted: October 11, 2004 at 9:33 AM
Might be a newb question, but not 100% sure :) Does box design ( i.e length, width, height) matter, or is 0.6 cubic ft, the same as all 0.6 cubic feet. Reason I'm asking, is because I want to get away with as litle box depth as possible so I have room to put my amps in front of the box without sacrificing the whole trunk. Thx in advance
Replies:
Posted By: dxav
Date Posted: October 11, 2004 at 9:38 AM
Well, you may get reflection of sound waves from the back side of the woofer and the back of the box. You can make a wedge style which will help. Not really going to matter with low power, though.
Just make sure the 0.6 ft3 can be attained considering the depth of the woofer in the box. I.E. Your box can't be 8" deep and have a woofer that is 9" deep.
DXAV
Posted By: DYohn
Date Posted: October 11, 2004 at 9:43 AM
If it's a subwoofer enclosure you are talking about, then size is much more important than shape. If it's an enclosure for mids and up, then shape becomes equally critical. Do a web search for "enclosure golden ratio". ------------- Support the12volt.com
Posted By: zolron
Date Posted: October 11, 2004 at 9:55 AM
Thanks for the quick replies. Sorry, might not have given enough info. Box will be for 2 ID10 V.3 subs, powered by a Kicker KX 600.1 ( 600 RMS @2hms). Planned box will be 16' x 12' x 8' (depth). Speaker is 5.5 inches deep, will 8 inches be deep enough?
Posted By: zolron
Date Posted: October 11, 2004 at 9:56 AM
edit. above specs is volume per sub....
Posted By: stevdart
Date Posted: October 11, 2004 at 10:17 AM
You got close to the golden ratio without even knowing it. But, with subs it doesn't matter, as DYohn said. Yes, 2 1 /2 inches behind the magnet is enough space.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: jeffchilcott
Date Posted: October 11, 2004 at 7:26 PM
for all who want to know the golden ratio is
width=1
depth=.618xwidth
height=1.618xwidth
I have never noticed much of a diffrence in SQ or SPL by using this ratio on sealed or ported boxes
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
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Posted By: boxmaker85
Date Posted: October 11, 2004 at 8:01 PM
lol. 0.618 the golden ratio. The ratio of all ratio's. The coincidentally "perfect" number. You'll find that number in almost everything you see around you. No a box's shape will not have a major impact on it's playing abilities. There are some exceptions (when a box is sqare and allows a standing wave to form). But otherwise no.
Posted By: fatgotti
Date Posted: October 12, 2004 at 10:12 AM
I am building a box for two 15" DC subs (SPLW15's) they need by manufactuer spec's 3.4ft3 tuning is 40Hz and they say you need 2 ports 4" in Diameter and 10" long I am wondering is the a way to switch that to slot ported and if so how? and should I or should I stick with round PNR ports or any suggestions on this subject would be greatly appreciated..
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Fatgotti Yeah my name is John and I am FAT!! YEAH BABY
Posted By: Niz1
Date Posted: October 13, 2004 at 7:56 AM
Boy the above post will teach me not to cut and paste from Word! Not sure what happened there, sorry. Anyway, what I was trying to say above was, should the "golden ratio" have the words width and height swapped. using those equations, my box would have to be 24 " tall and 14 " wide. My trunk and most others I have seen are not that tall. I'm assuming gravity does not affect sound. Niz ------------- Niz
Posted By: stevdart
Date Posted: October 13, 2004 at 8:01 AM
Look at it as "0.62 : 1.0 : 1.62" so that the 1.0 can represent any side of the box. It could be depth or height instead of width. But keep in mind this ratio is rarely used in subwoofers...it's not necessary. The posts above were for information purposes about enclosures for mids and highs.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
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