so i have noticed that my sub is louder with the windows down, noticeably at that. with the windows rolled up its loud and sounds great, but with the windows rolled down it seems to push better. every thing works fine, nothing is going haywire.

right now my 12 is in a sealed box, but im curious if i need a ported box. im not chucking a ton of power to the sub atm, im running an older rockford amp 500x2 bridged. normally i run and alpine 600x1 mono. but it as well does the same thing...lowder(seeming) with the windows down.

my sub
PowerBass Xtreme 2XL-124D Subwoofer | PowerBass USA

 

Ive noticed that with nearly every set of subs I've owned.

 

Ported sub boxes will produce louder volumes because they can move more air. As long as the port is tuned to the proper frequency for the speaker.

As for the windows being down and the sub being louder, That is most likely due to the frequencies being trapped inside the vehicle, and canceling eachother out. I can explain this more to you in person/ IM later tonight if you want.

 

yeah the windows down just gives the subs more air to push and room to push it, its the same case in all the vehicles ive owned as well

 

Yeah, my truck was like twice as loud with the windows down. Then I did the sound deadening and it made it a lot louder in the truck with the windows up, almost as loud with them down.

 

That would be because the sound gets absorbed, rather than reflected, so the waves can't cancel each other out. therefore, audio appears to be louder (sounds like it doesn't make any sense, trust me, that's how it works.)

 

ok, im understanding. its just weird that it will vibrate my mirror quite a bit more wi them down....

eff it... i need 2 more subs and 5k wats

 

Wrong. The sound deadening doesn't absorb anything. It stops energy from being wasted resonating metal panels.

 

Sound waves, and the reflections do not cancel each other out with the windows down, cause there is less reflection.



Red wave = sound wave off speaker.
Blue wave = reflection

(+1) + (-1) = 0. Canceled sound wave.

 

Energy will be lost anyways, because it has to go somewhere. it's called sound deadening for a reason.

 

no pissing matches!

 

Obviously energy is going to be lost always. But less is lost with sound deadening. It is more of vibration dampening than anything and is the proper name to call it. It is not absorbing sound waves and making it harder to hear outside of the truck, as you would think. Also what you are saying probably has very little to do with SPL as SPL is not a measure of just dB. Which is why if you take a dB meter and use that on your system you will not get the same result as you would with an actual Termlab. The reason your bass hits harder with the windows down is because you are moving more air with them down, which is why your mids and highs dont get louder with the windows down as well.

 

This is true... dammit, IDK wht i didn't think of that before... I've been doing this sound **** for 8 damn years! lol


longass day = fiddes no think straight lol

EDIT: longass few weeks

 

following!

 

however, what I said about cancellaton still applies as well, which makes the difference more noticeable.

 

noticed the same thing also

 

Is it true that a sealed sub box sounds better ?
More clarity in the music reproduction ?

 

Ive also noticed that if my passenger window is down, but my drivers window is up...Its so loud it makes my left ear drum hurt.

 

Then turn it down and that won’t happen… LoL

 

mine only seems to get louder with the windows down because its nicer outside and i want to crank the music even louder!

 

i have no ear drums to mess up...i already have hearing loss and tenitus(annoying btw)

i hear ya there!