mounting subs?

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Is there any way of mounting a single 10" or 12" sub in my '01 sentra without using a box or anything. Like mounting it behind the rear seats? What is the best thing to do?

[Meeks32]

There are "Free Air" subs or "Infinite baffle" that you can buy. These usually require alot of power & even though ive never heard one, I wouldnt think that they would sound as good as one in a box.

[Ayastigi]

just remember LBC that a subwoofer will perform and breathe through your rear seat just about as well as you do (not so well).

There are currently aperiodic membranes available for your application. These materials are suspended behind, or in front of the sub and serve to regulate air-pressure changes near the sub/driver. The driver 'sees' the mechanical friction of a much larger space even though the total volume of air trapped between the membrane and the driver is a fraction of what is normally called for in a standard rigid enclosure. This can really help you get some of that wasted trunk space back with large subs.

Check out these two links for more information and examples:
CCA - Aperiodic Membrane (http://www.canadiancaraudio.com/rvw/Forum1/HTML/000001.html)
Elite Car Audio - Aperiodic Membrane (http://www.elitecaraudio.com/home/html/article.php?sid=105&mode=thread&order=0) http://www.canadiancaraudio.com/rvw/Forum1/HTML/000001.html
and
http://www.elitecaraudio.com/home/html/article.php?sid=105&mode=thread&order=0

Maybe this is the option for you.

Cheers,
2kMax

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Thanks for your help. I'm not quite sure if this is the solution for me, but it does sound like a good idea. I'm going back and forth on the topic of systems.

[ 11-18-2001: Message edited by: LBC ]

[Meeks32]

There may be some Q forms made for your car, or maybe something from JL Audio. They are made to fit into your trunk without taking up space.

[**DONOTDELETE**]

Free air subs are a good option, but if you have rear-deck mounted speakers they will get beat up from the back pressure of the free-air subwoofer. Free air subwoofers tend to sound more boomy than a normal sealed box subwoofer. If your space is really limited, free-air is the way to go. You have another option though. Allot of subwoofers nowadays require very small enclosures. Infiniti Perfect 10" subwoofers require only .65 cubic feet of internal space. I'm planning on installing a pair of them to the rear deck of my '91 Infiniti Q45. They sound EXCEEDINGLY nice and you can find them online as low as $150. Pioneer, JL Audio and other subwoofer manufacturers make subs that work awesome in itty-bitty boxes. My advice is to visit your local car stereo shop and tell them what your budget is and show them what you want done. Based on that they can make suggestions. Its always handy to draw out a quick sketch to get your idea across. Make sure you get a good amplifier that has enough power to properly drive the subwoofer. If you get a 100watt amp for a 400watt sub, the sub is going to sound downright ugly. Good luck!!

Q45guyX
(shade-tree stereo installer) images/icons/smile.gif

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<BLOCKQUOTE><font size="1" face="Verdana, Arial[/img]quote:</font><HR>Originally posted by Q45guyX:
Free air subs are a good option, but if you have rear-deck mounted speakers they will get beat up from the back pressure of the free-air subwoofer. Free air subwoofers tend to sound more boomy than a normal sealed box subwoofer. If your space is really limited, free-air is the way to go. You have another option though. Allot of subwoofers nowadays require very small enclosures. Infiniti Perfect 10" subwoofers require only .65 cubic feet of internal space. I'm planning on installing a pair of them to the rear deck of my '91 Infiniti Q45. They sound EXCEEDINGLY nice and you can find them online as low as $150. Pioneer, JL Audio and other subwoofer manufacturers make subs that work awesome in itty-bitty boxes. My advice is to visit your local car stereo shop and tell them what your budget is and show them what you want done. Based on that they can make suggestions. Its always handy to draw out a quick sketch to get your idea across. Make sure you get a good amplifier that has enough power to properly drive the subwoofer. If you get a 100watt amp for a 400watt sub, the sub is going to sound downright ugly. Good luck!!

Q45guyX
(shade-tree stereo installer) images/icons/smile.gif<HR></BLOCKQUOTE>

Thanks for your help. I am actually planning on getting 2 12" Legacy Subs, and a 1000watt Alpine V12 amp from a friend for like $350. Quite a bargain. Together, the subs total 900watts, so the amp is powerful enough. Maybe even powerful enough to power the stock speakers too. I'm not sure if thats a good idea though. My other problem is whether or not I should put an aftermarket system in my leased car (2001 Sentra SE w/pp). Is it okay to put in the system?

[Ayastigi]

I've had aftermarket systems in two of my nissan leases before with no issues. Just make sure you return things to "near stock" when its time to turn the vehicle in. I replaced the head unit, removed the amps and subs, and then just cut the wires where they exited the carpet. No problems with the turn in.
Not necessarily a recommendation, but I know that Circuit City has competitive pricing for installations and they will do the removal for free on any system they've installed. You may have to purchase a component from them to get them to do the install, but it could save you tons of time in the long run. Plus, if they screw something up, they'll be paying for it.

good luck
-2kmax

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A 1000watt Alpine V12 amp powering 2 Legacy 12" subs? Legacy is known for being bottom of the barrel junk speakers. And a 1000watt amp would simply blow them to smitherines. A friend of mine bought some Legacy speakers from PartExpress.com and I tell you they were about the worst subs I ever heard. He's so cheap that at one time he bought 12" radioshack subs. Now THOSE were pure crap! I thought you were looking to conserve space? And if your vehicle is on lease, I would suggest the Bazooka Bass Tubes or the Infiniti BassLink. Both are awesome products with built-in amps and install/de-install easily. Bazooka basstubes are very popular amongst people who lease cars, while the BassLink hasn't been around for too long but is growing in popularity for its monster power yet tight bass from a small package. Of course, its all up to you. Happy thumpin! images/icons/smile.gif

[**DONOTDELETE**]

<BLOCKQUOTE><font size="1" face="Verdana, Arial[/img]quote:</font><HR>Originally posted by Q45guyX:
A 1000watt Alpine V12 amp powering 2 Legacy 12" subs? Legacy is known for being bottom of the barrel junk speakers. And a 1000watt amp would simply blow them to smitherines. A friend of mine bought some Legacy speakers from PartExpress.com and I tell you they were about the worst subs I ever heard. He's so cheap that at one time he bought 12" radioshack subs. Now THOSE were pure crap! I thought you were looking to conserve space? And if your vehicle is on lease, I would suggest the Bazooka Bass Tubes or the Infiniti BassLink. Both are awesome products with built-in amps and install/de-install easily. Bazooka basstubes are very popular amongst people who lease cars, while the BassLink hasn't been around for too long but is growing in popularity for its monster power yet tight bass from a small package. Of course, its all up to you. Happy thumpin! images/icons/smile.gif<HR></BLOCKQUOTE>

I never actually said that I wanted to conserve space. I was just wondering how much space 2 12's would take up. And the subs aren't that bad. I have heard from many differnet sources that they are decent quality. Plus, I highly doubt they would ever blow from the 1000watt amp.

[**DONOTDELETE**]

The V12's tend to be very powerful and often pump significantly more than rated. Mine were putting about 45% more. If you are running a amp like that bridged mono to those Legacy subs it may be more than they can handle. Just be sure to keep the gain and the bass equalizer on the amp set pretty low to keep from smacking those voice coils on the magnets. Also remember to use a faily low crossover setting since 12's should have no problem with the lower frequencys.