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bad to fire subs in opposite direction?

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=106646
Printed Date: July 06, 2025 at 5:27 PM


Topic: bad to fire subs in opposite direction?

Posted By: daddy longlegs
Subject: bad to fire subs in opposite direction?
Date Posted: August 08, 2008 at 4:38 AM

I couldn't find this anywhere specifically, but will I lose bass by firing 2 10" subs in opposite directions?  I will be building a center console in a minivan to conserve useful space but want to get the most out of it.  I already have the subs but if using one would give better results, then I'd rather do that.  I may be able to fire them downwards - just don't know if that would be a good idea?  Any tips would be appreciated!

Thanks!




Replies:

Posted By: i am an idiot
Date Posted: August 08, 2008 at 6:11 AM
Firing subs in different directions is an everyday thing.  With having only 2 10 inch woofers in a minivan, I think downfiring would be a really good idea. 




Posted By: stevdart
Date Posted: August 09, 2008 at 2:44 PM
You can also always experiment with switching polarity on either of the two subs.  Switching polarity of both subs at the amp should also be experimented with.  You'll likely find that both subs wired normally will result in loudest bass.

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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: i am an idiot
Date Posted: August 09, 2008 at 9:18 PM

I think he is placing both woofers in a console of a minivan.  They will possibly be firing one to the left side of the vehicle, and the other firing to the right side of the vehicle.  Wiring the woofers out of phase would definitely result in much less bass. 





Posted By: daddy longlegs
Date Posted: August 10, 2008 at 1:47 AM

Hey guys,  thanks for the tips.  I'm new to forums but I have to say, this is a great site.  I'm a fairly inexperienced shadetree (or actually "driveway in the middle of the night") type of installer.  I've done a few, but it's been a few years since and I have a lot to learn.  That being said, I did this a few years ago in a former Toyota Sienna: I built the box between the two front seats as to not take up any family/storage room elsewhere.  The subs were in their own seperate chambers, one firing forward and the other firing into the rear (with cupholders on top - hence a center console ; )  I've wondered ever since if I should have done it differently because I've heard over the years about bass waves cancelling each other out sometimes.

My wife and I miss our sound, and I was wondering if I could get more out of it this time by changing the direction of firing.  Are there any drawbacks to downfiring?  What is the minimum amount of space I need between the subs and the floor?  If it matters, the subs are some old Crossfire 10s.

Thanx!

btw - anyone else out there with a minivan doing a stealth install to save the vehicle for it's intended use (hauling the family and stuff)?  Or am I just the oddball?  : )






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