Woofer sag
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=61977
Printed Date: May 02, 2024 at 7:10 PM
Topic: Woofer sag
Posted By: mobile E
Subject: Woofer sag
Date Posted: August 24, 2005 at 3:57 PM
I was experimenting yesterday with my subwoofer placement and i found that i liked downfiring alot.... does the sw7104dvc.t2 with the specs fs=33hz vas=.70 cuft xmax (one way) = 1.4" have good specs for sag in a downfiring position... i found a calculator on a webpage related to adire audio stuff... but it was not working correctly :( any help would be greatly appreciated :) thanks-- matt ------------- everything stolen :(
Workin on a new system :)
:V:
Peace in the middle east
Replies:
Posted By: DYohn
Date Posted: August 24, 2005 at 5:27 PM
Percentage of Sag = 24,849 / ( Xmax * Fs²) If Sag% < 5%, the driver may be mounted down (or up) firing. (Xmax must be in milimeters.) ------------- Support the12volt.com
Posted By: DYohn
Date Posted: August 24, 2005 at 5:32 PM
Here's the Adire tech paper on this topic written by Dan Wiggins, which is very useful: https://www.adireaudio.com/Files/TechPapers/DriverOrientation.pdf------------- Support the12volt.com
Posted By: stevdart
Date Posted: August 24, 2005 at 11:46 PM
A handy sag calculator written using the formula defined in the Adire white paper, as you can see by the credit given. ------------- 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: HICKMANAE3
Date Posted: September 14, 2005 at 12:12 PM
whats does downfiring mean?
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No security system can beat the tow truck :(
Posted By: sneakycyber
Date Posted: September 14, 2005 at 4:24 PM
Cone facing the floor
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Posted By: HICKMANAE3
Date Posted: September 14, 2005 at 11:14 PM
Does that give off more bass then having a exnclouse box because i thought the sub must have a certain sq feet around the voice core so the pressure can build up and become greater to push more bass out/ ------------- No security system can beat the tow truck :(
Posted By: stevdart
Date Posted: September 15, 2005 at 7:36 AM
.......Front-firing....................Down-firing......... ------------- 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: exdox77
Date Posted: September 16, 2005 at 4:44 PM
your not really going to be more bass, actually it would be like being in a bandpass box. but you would really get lower spl, but may be beneficial if you are a SQ guy. you could filter out noise from the speaker and other stuff like that. in theory you wouldnt really be very beneficial but thats my suggestion
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Mobile Archviers -
Ever Growing Vehicle Archive's
Posted By: Fosgate3
Date Posted: September 25, 2005 at 7:53 AM
One of the benefits that I have found in a downfire arrangement is that often, the vehicle's floor carpet/padding acts acoustically with the output of the sub, helping getting rid of standing waves and crap like that. I really enjoy the sound that a properly made downfire enclosure does. I have experimented with various heights-from-the-floor and found that 2 inches really does well, 3 is fine, higher seems to make it sound different to me. As most of us probably know (for the benefit of those who dont), the sub has to have some distance between it and the floor in order to give a good output. For SQ purposes, as was previously stated, IMO, downfire is one of the ways to go, if your application allows for it. For SPL, IMO, I would not recommend it. Just as the carpeting acts acoustically for an SQ application, it can "take away from" the output of the sub if your are trying go SPL. Just my $2.59 worth.
Posted By: mobile E
Date Posted: September 27, 2005 at 4:47 PM
yes, the sq of the down firing enclosure is just awesome, its so clean and accurate....
as far as spl it gets only a little quieter...
i love it ------------- everything stolen :(
Workin on a new system :)
Peace in the middle east
Posted By: bumpingjeep
Date Posted: October 02, 2005 at 12:37 PM
go ahead and call me a hick or a slob...but i like it for the simple fact that i can still throw crap in the back or load things on top of my box
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1987 Huffy...spinners...two 15's custom mounted to the back
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