Subs facing each other. Good idea?
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=84780
Printed Date: May 09, 2025 at 11:26 PM
Topic: Subs facing each other. Good idea?
Posted By: colvera21
Subject: Subs facing each other. Good idea?
Date Posted: October 28, 2006 at 7:06 PM
to all of you audio experts: do you think facing subs will give me good bass. i seen a BMW on the net that had this setup which looked real cool but i dont know if it would sound good.  i couldnt upload the second pic which showd it better but basically he has his subs each in a sealed enclosure facing each other and another sealed enclosure where they are facing each other. does anyone know if this would sound good
Replies:
Posted By: Velocity Motors
Date Posted: October 28, 2006 at 7:33 PM
As long as they are out of phase of each other, there's no problems. Wire one subwoofer opposite on the terminals to the other and this will create one sub to act out of phase.
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: colvera21
Date Posted: October 28, 2006 at 7:42 PM
what will that do? it will be the push/pull effect correct. so if they are both in phase then it will sound horrible? the reason why i am asking is because i have two 12' kicker L7 right now and my trunk rattles like crazy so im trying to figure out a way to set it upto where most of the bass goes into the cabin. thanks for the reply
Posted By: aznboi3644
Date Posted: October 28, 2006 at 7:47 PM
Well if the trunk rattles like crazy means you need some sound deadener and maybe retightening some loose nuts and bolts
Posted By: boulderguy
Date Posted: October 29, 2006 at 10:31 AM
Velocity Motors wrote:
As long as they are out of phase of each other, there's no problems. Wire one subwoofer opposite on the terminals to the other and this will create one sub to act out of phase.
Wouldn't this just cancel out all the output? Why would he do it this way? I'd think 100% in-phase would be the way to go. School me please.
Posted By: stevdart
Date Posted: October 29, 2006 at 11:27 AM
]and a wrote:
other sealed enclosure where they are facing each other.
What are we looking at in that pic, an open hole or a plexiglass window? ------------- 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: colvera21
Date Posted: October 29, 2006 at 3:18 PM
i have put in sound deadner but it still rattles. i have a lexus gs300 so it alreay had some deadner in it.the picture is a plexiglass window but i was thinking of having it open to let the bass go thru the cabin. does anybody have any other ideas of creating a custom box so that all the bass goes to the cabin?
Posted By: stevdart
Date Posted: October 29, 2006 at 6:40 PM
Deadener = you have to apply damping (Dynamat, etc.) directly to the sheet metal in a lot of areas when you double up on the subs, especially the trunk. Even modest one-sub systems need a lot of metal damping done. All the bass will go into the cabin and it will all go into the trunk...all you do is provide an opening from trunk to cabin. The opening will allow for equalization of pressure throughout the car. Build a standard, tried-and-proven sort of enclosure for your subs. Face them to the same direction (try toward the rear of the trunk), as you should have plenty of room to work with in a Lexus. ------------- 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: aznboi3644
Date Posted: October 29, 2006 at 10:42 PM
lol Yes adding additional sound damping is needed...I don't think the factory deadener is made to put up with subs in the trunk...also you may need to apply multiple layers on some areas
Posted By: boulderguy
Date Posted: October 30, 2006 at 7:14 PM
boulderguy wrote:
Velocity Motors wrote:
As long as they are out of phase of each other, there's no problems. Wire one subwoofer opposite on the terminals to the other and this will create one sub to act out of phase.
Wouldn't this just cancel out all the output? Why would he do it this way? I'd think 100% in-phase would be the way to go. School me please.
Answer?? Or are we talking about a clamshell setup?
Posted By: jonathancullen
Date Posted: October 31, 2006 at 2:04 PM
if they where wired opposite then one would be pushing while the other pulling.....you wouldnt get the bass as if they where both hitting in phase. i would try to put a bit of an angle on both subs and facing them at each other. are you making sort of a bandpass with a sealed back then the front ported/vented or open?
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