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Old 12-11-2003, 01:02 PM   #1
e46mtl
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Question Subs facing fowards to the seats or backwards?

Hey guys, I'm going to have my subs and amp installed in an enclosure in january, the installer told me that for e46's, it's better to have the subs facing the seats as opposed to the back of the car,so to get more output because the trunk is well sealed? From looking at all the pictures from the sub installs, i see that the majority of the installs are rearward facing so made me wonder. Now what i wanna know is whether or not there is a difference in sound output between facing it fowards or backwards? My friend's e46 had a foward facing sub enclosure, i think it might have been installed improperly, but it raddled and vibrated the seats everytime it was used. Can anyone clarify which is better or is there now significant difference?
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Old 12-11-2003, 07:17 PM   #2
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i dont drive an e46, but in my 7 series, i have them facing the trunk (not the seats) i have tried both ways and found that this way just sounds better. they always rattle the rear seats but theres nothing you can do really. if i had an e46 what i would do is have them face the seats and when your alone just roll with the seats folded down, i dunno what it would sound like but its just my 2 cents.
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Old 12-12-2003, 02:23 AM   #3
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I have heard about the trunks being sealed really good also... Maybe you should look into a ported box instead of sealed. That should clear up that issue... You can always drop the back seat a little also... I will have my system in soon so you can check it out, I am in westchester ny
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Old 12-12-2003, 02:45 AM   #4
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my subs are facing toward the front.... i ahve one of my backseats down to let bass into the cabin otherwise there is a huge decline in bass... trust me tell them to build an enclosure thats firing into the cabin... i have heard other installs in a 3 and they dont sound nearly as clean/loud/or proper like mine does
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Old 12-12-2003, 11:31 AM   #5
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I dont have much experience w/BMW systems (yet) buy the traditional rule of thumb is to face the subs toward the trunk to achieve what is known as "cabin gain" which is the sound waves being allowed to reflect off of the trunk and back into the cabin i cant completely remeber the technical definition but it has something to do with allowing the soundwaves to expand or something along those lines
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Old 12-15-2003, 07:50 PM   #6
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but do most sub enclosures that face the back seats cause a lot of vibration? Because I'm pretty sure he doesn't want his back seats to feel like a vibrator on steroids.

any suggestions to make this work? (i'm interested)

or any other input?

anyone have any pics of subs facing inward?
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Old 12-15-2003, 08:00 PM   #7
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I have had both setups. The subs facing the cabin are louder, but in my experience not as clear. I chose to have more power and point them towards the trunk. They sound very clear, and hit hard. I removed the ski pass, and that helped a lot.
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Old 01-01-2004, 03:53 AM   #8
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is there really a big difference in the direction? if you face the subs towards the ski pass does the bass not hit as clean?
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Old 01-01-2004, 02:50 PM   #9
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face them towards the trunk. never face them to the cabin.
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Old 01-01-2004, 04:00 PM   #10
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why not?
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Old 01-01-2004, 08:08 PM   #11
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Quote:
Originally posted by ///NYCM3
I have had both setups. The subs facing the cabin are louder, but in my experience not as clear. I chose to have more power and point them towards the trunk. They sound very clear, and hit hard. I removed the ski pass, and that helped a lot.
Agree with you....in fact, I am running tubing through my sub box to the ski pass to accomplish breathing and sound carry to the cabin.
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Old 01-03-2004, 06:31 PM   #12
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Facing the subs rearward helps mask the mechanical noise present when some subwoofers are driven by a lot of power. I have yet to put subs in my 330 but I'm pretty sure trunk rattle won't be an issue since the trunk lid is somewhat heavy, but the tool kit might cause some noise. The best way is to try it both ways...the subs...and see what sound the best. If you can reverse the phase of the subs, try it with each combination.

A couple of years ago, I saw a product that was a flexible port. You could ditch the rear speakers and vent the sub box into the cabin that way.
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Old 01-06-2004, 09:11 AM   #13
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any thoughts on back seat vibration if you were to face the subs into the cabin?

I was told from a professional car audio installer (and by professional I mean show winning/large audio projects) that it is better to face it forward in an e46...
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Old 01-06-2004, 10:16 AM   #14
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I have always faced subs toward the trunk, but I really guess it is personal opinion.
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Old 01-07-2004, 06:33 AM   #15
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I was told from a professional car audio installer (and by professional I mean show w

I guess I'd take the advice of the pro...face them forward. Every car is different and different types of interior materials and distance between the driver and speaker affect the perceived SPL.
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