physics of a sub and moving air

[Broke_Audio_Addict]

No they aren't.

[Jessica]

30hz is 30hz, 50hz is 50hz

[Jessica]

I would accept maybe if a tractor trailer hits a wall at 100mph vs a moped doing the same as an analogy. One has way more kinetic energy, the high Power sub would have stiffer suspension, heavier parts. But in the grand scheme, there is not a whole lot different between the two speakers or what they are doing.

They both move the same number of times a second and if the xmax/xmech is the same then they have the same acceleration and speed as well

[Broke_Audio_Addict]

You clearly know that is wrong though since you know there is going to be a huge difference in output.

[Broke_Audio_Addict]

Also xmax and xmech are not really as much at play as you think since the highest output is achieved at tuning which will have the lowest amount of excursion.

[Jessica]

Explain how a sub can play 30hz "faster " than another sub given they move the same distance?

[Broke_Audio_Addict]

Are we talking about playing music or sine waves?

Huge difference.

Remember subs also have to overcome opposing forces and the higher powered sub is going to have an advantage there as well.

[Jessica]

We aren't talking about tuning, well I'm not. My point iss, two subs, with same x max ( or whatever you want to call it) but with different max power ratings, will each move the same distance under their respective max power.

Since both move ghe same distance, if they are both played at max volume, the higher power sub will move more air.

Or am I wrong?

[ckeeler11]

I suspect that some of these vehicles that do wicked hair/shirt/cat tricks the entire cabin is acting as a Helmholtz resonator (like a ported box). This would be one possible explanation for the large amounts of air movement.

If you wanted a good science experiment you could try to prove if that's what is happening or not.

I have 2 cars with systems. 2000 Tacoma single cab 3 10" p3 sealed, t1500bdcp, t400-4, Dynamat everywhere, ho alt, and battery bank

2015 Corolla 2 10" p3 prefab ported box. Hifonics 1950.1 stock electrical.

The truck moves a lot more air then my car. Can I just say that the theory is bigger systems that do hair trick turn the car into the box. Take my two systems that run the same power (on paper) and say that because my trucks can is smaller there for it moves more air? And expand on that? I haven't done a science project in almost 10 years. I really do appreciate all the feedback and help from you guys

What would happen if you put the truck system in the car, would you get the same results? i doubt it since the volume of air in the vehicles are different.

[Efreakingt]

I've run dual 12's in 2 sedans of nearly identical cabin size. One was sealed and one was ported. The ported setup was more violent inside the car by a good bit. Next I stepped up to 4 12's in a larger cabin running on infinite baffle. That setup was extremely violent inside. I ran a single ported 10 in a regular cab s10 and it was close to the 2 ported 12's in a sedan.

Every aspect will effect the result. Cabin size, cone area, power, restrictions of air flow etc etc. Historically pickups, hatchbacks, suvs and wagons have the most fun with air because it moves unrestricted. Subs in trunks that have to overcome the seats and trunk deadening materials don't get as turbulent as easy.

Another subject to look into is cabin gain. It's not an exact science but it's generally close to correct. Basically a note of a certain hertz creates a soundwave of a certain length. The larger the cabin is the farther it can go before it starts going insane inside your car bouncing around. The smaller cars have larger cabin gain because of this.