Subs facing each other. Good idea?

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colvera21

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Joined: August 21, 2006

Location: United States

Posted: October 28, 2006 at 7:06 PM / IP Logged

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. Subs facing each other. Good idea? -- posted image.

Subs facing each other. Good idea? -- posted image.

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

Velocity Motors

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Joined: March 08, 2002

Location: Manitoba, Canada

Posted: October 28, 2006 at 7:33 PM / IP Logged

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.

Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

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colvera21

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Joined: August 21, 2006

Location: United States

Posted: October 28, 2006 at 7:42 PM / IP Logged

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

aznboi3644

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Posted: October 28, 2006 at 7:47 PM / IP Logged

Well if the trunk rattles like crazy means you need some sound deadener and maybe retightening some loose nuts and bolts

boulderguy

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Posted: October 29, 2006 at 10:31 AM / IP Logged

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.

stevdart

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Posted: October 29, 2006 at 11:27 AM / IP Logged

wrote:

and another 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.

colvera21

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Joined: August 21, 2006

Location: United States

Posted: October 29, 2006 at 3:18 PM / IP Logged

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?

stevdart

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Posted: October 29, 2006 at 6:40 PM / IP Logged

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.

aznboi3644

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Location: United States

Posted: October 29, 2006 at 10:42 PM / IP Logged

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

boulderguy

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Joined: April 17, 2005

Location: United States

Posted: October 30, 2006 at 7:14 PM / IP Logged

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?

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