1 18" ported vs 8 12"s sealed

[PV Audio 5,000+ posts]

Not if the subs **** *** lol. Have you heard them?

No, but as DB said, the amount of cone area is astronomical.

 

[ThatChevyGuy 5,000+ posts]

there will still be a large rolloff below 40 hz with those subs sealed even if you had 100 of them, Thats just how they are. 40 hz machines

 

[DBfan187 5,000+ posts]

 

[PV Audio 5,000+ posts]

there will still be a large rolloff below 40 hz with those subs sealed even if you had 100 of them, Thats just how they are. 40 hz machines

Your reasoning isn't flawed; it's just flat out wrong. That roll-off might be there, no one is denying that. The problem is that when you increase cone area, you are increasing output across the board. What you're saying is that if you take 10 6.5" speakers in a line array, that when one speaker might not have great bass response, that the entire tower will not have better bass response. The whole is greater than the sum of its parts. This is the whole reason to use multiple drivers, because even if individually each struggles to move a lot of air down low, 8 of them moving that same amount of air each is a LOT of air being moved, and since sound is basically just changes in sound pressure, then your reasoning proves to be wrong.

 

[Brian Owens 10+ year member]

I do not have experience with the HiFonics drivers, but if they roll off below 40 Hz, adding more of them is not going to help that. It is going to increase output, not change frequency response.

With more cone area, you could EQ them to help the problem, but just adding more subs will increase the output across the entire output range, not just below 40 Hz.

 

[PV Audio 5,000+ posts]

I do not have experience with the HiFonics drivers, but if they roll off below 40 Hz, adding more of them is not going to help that. It is going to increase output, not change frequency response.
With more cone area, you could EQ them to help the problem, but just adding more subs will increase the output across the entire output range, not just below 40 Hz.

No one said that the FR will change, rather you take said FR plot and shift it vertically assuming dB is on the dependent axis. What was said is that adding more cone area will grant you output in the low frequencies that just one speaker has trouble producing solid output in. If you don't hear much below 40hz with one hifonics 12 whatever, i can guarantee that you will when you have 8 of them.

 

[DBfan187 5,000+ posts]

hear it? he'll feel it!

 

[kfx450r 10+ year member]

Its also a good idea to know the background of a "reviewer" ..If your taking advice from someone who hears every minute detail in a drivers performance, something that the average car audiophile would never hear, then things tend to change. I know alot of people talk about "quiet" drivers and such..But if im running 8 12s ..I doubt imma hear anything other then some crazy bass.

Same concept as ...someone going from a 12" BTL on 2k watts to a 12" Hfi..obviously there gonna think the HFI sucks going from such a good sub. But if you go from a sony xplod i think you'll fall in love with the hfi

 

[Brian Owens 10+ year member]

No one said that the FR will change, rather you take said FR plot and shift it vertically assuming dB is on the dependent axis. What was said is that adding more cone area will grant you output in the low frequencies that just one speaker has trouble producing solid output in. If you don't hear much below 40hz with one hifonics 12 whatever, i can guarantee that you will when you have 8 of them.

What I am saying is while you may get more outptu below 40 Hz, you will also hear a lot more of everything above 40 Hz too, so it is still going to sound the same, just louder. It is not going to magically just have more output below 40 Hz vs. the other frequencies because you have more drivers.

 

[PV Audio 5,000+ posts]

What I am saying is while you may get more outptu below 40 Hz, you will also hear a lot more of everything above 40 Hz too, so it is still going to sound the same, just louder. It is not going to magically just have more output below 40 Hz vs. the other frequencies because you have more drivers.

This I know, which is why I said the FR just gets shifted vertically //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[KickerL715 10+ year member]

so technically if if i went with 6 12's and ported them i would be louder than the 8 12's sealed?

Yea 6 ported will be louder for sure the oone 18 is a bad *** sub with right amp it will be more then you need