cone size vs. watts

[I_no_mad 10+ year member]

OK, so the only thing to look at really in a good sub is the watts and driver size and what else?

No. I'm actually just telling you how to factor circle surface area and potential output. nothing more.

There is a lot to deciding what's a really good sub.

 

[pimpnyou204 10+ year member]

so did you dipshit as the surface area of a speaker, also known as effective piston area or surface displacement is not calculated with the size of the speaker... so before you ridicule someone else KEEP READING
as for the gentleman that said larger subwoofers play deeper better... your also wrong, its a common mistake so i won't ridicule you but 10's will play just as deep as 18's in the proper enclosure and power.

a "general" on effective piston area would be 310cm^2 for 10's 480cm^2 for 12's and 810cm^2 for 15s 15's vary from 1050cm^2 to 1200cm^2... all these are averages as every speaker is different

so 2-15's are about the same as 5-10's, 1-18 is closer to 4-10's

there are many many factors that contribute to that last bit of difference when cone area, wattage, and vehicle are all the same, one thing to look at is efficiency, in this situation the setup that is more efficient will obviously play louder. normally its cheaper to go for cone area at the expense of SQ, example, it would be cheaper to pick up 4 cheap 10's than 1 decent 18. hope that helps

That helped a lot.. So theoretically 2 18s would sound the best in average sized trunk of a car bcuz of the fact that their bigger and would need less total space overal compared to like 4 or 5 10s yes?

Whats piston area or surface displacement?

Also sorry for all the questions and i appreciate all the answers.

 

[pimpnyou204 10+ year member]

No. I'm actually just telling you how to factor circle surface area and potential output. nothing more.
There is a lot to deciding what's a really good sub.[/QUOTE]

Then name em all please //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[I_no_mad 10+ year member]

Then name em all please //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

bcae1.com

good luck

That helped a lot.. So theoretically 2 18s would sound the best in average sized trunk of a car bcuz of the fact that their bigger and would need less total space overal compared to like 4 or 5 10s yes?

Umm no. Two 18" drivers would require a much larger box then 4-5 10" drivers of the same model.

 

[spencer321 10+ year member]

That helped a lot.. So theoretically 2 18s would sound the best in average sized trunk of a car bcuz of the fact that their bigger and would need less total space overal compared to like 4 or 5 10s yes?
Whats piston area or surface displacement?

Also sorry for all the questions and i appreciate all the answers.

no, 2 18's will probably require even more space than 4 or 5 10's, for instance... most 18's require at least 5 cubes net per subwoofer to perform efficiently, so 2 18's would take a 10ft^3 box, where as 5 10's would take ~ 7.5ft^2 but 2 18's would be more comparable to 7 or 8 10's which could be anywhere from a 8ft^3 to a 12ft^3 box

effective piston area is the portion of the cone which is effectively moving air basically, in other words, the subwoofer may be 10" overall diameter, outside to outside, but the cone surround is not completely considered part of the effective piston area, normally you only count 1/3 to 1/2 of the surround as part of your piston area. in other words, if you have a 10" sub with a 1" surround you only have an 8" cone but you add 1/3 to 1/2 of the surround to get your total effective area the numbers "i no mad" is giving you are not accurate

 

[I_no_mad 10+ year member]

effective piston area is the portion of the cone which is effectively moving air basically, in other words, the subwoofer may be 10" overall diameter, outside to outside, but the cone surround is not completely considered part of the effective piston area, normally you only count 1/3 to 1/2 of the surround as part of your piston area. in other words, if you have a 10" sub with a 1" surround you only have an 8" cone but you add 1/3 to 1/2 of the surround to get your total effective area the numbers "i no mad" is giving you are not accurate

Man my old MT10 had like zero cone area... Must not have any potential to get loud.

Like I said, finding out the VD of the driver will help better understand an estimate on output potential.

 

[kodak314 10+ year member]

don't forget about the box

 

[spencer321 10+ year member]

Man my old MT10 had like zero cone area... Must not have any potential to get loud.
Like I said, finding out the VD of the driver will help better understand an estimate on output potential.

don't cry like a girl cuz you didn't know the outside of our surround wasn't moving any air...

and for volume displaced, which you could spell out instead of trying to sound smart by using acronyms, you can go about it 1 of 2 ways, either (A) the simple and not as accurate method of multiplying effective piston area (not total area of the sub... yes they are different stupid) by the maximum linear excursion(xmax) or (B) you could do it the technical way and use this formula

http://www.ajdesigner.com/phpsubwooferclosed/k1_constant_equation_vd.php

have fun

 

[I_no_mad 10+ year member]

don't cry like a girl cuz you didn't know the outside of our surround wasn't moving any air...
and for volume displaced, which you could spell out instead of trying to sound smart by using acronyms, you can go about it 1 of 2 ways, either (A) the simple and not as accurate method of multiplying effective piston area (not total area of the sub... yes they are different stupid) by the maximum linear excursion(xmax) or (B) you could do it the technical way and use this formula

http://www.ajdesigner.com/phpsubwooferclosed/k1_constant_equation_vd.php

have fun

LOL u mad

 

[spencer321 10+ year member]

LOL u mad

LOL u dumb...

 

[I_no_mad 10+ year member]

LOL u dumb...

ib u mad

 

[pimpnyou204 10+ year member]

no, 2 18's will probably require even more space than 4 or 5 10's, for instance... most 18's require at least 5 cubes net per subwoofer to perform efficiently, so 2 18's would take a 10ft^3 box, where as 5 10's would take ~ 7.5ft^2 but 2 18's would be more comparable to 7 or 8 10's which could be anywhere from a 8ft^3 to a 12ft^3 box
effective piston area is the portion of the cone which is effectively moving air basically, in other words, the subwoofer may be 10" overall diameter, outside to outside, but the cone surround is not completely considered part of the effective piston area, normally you only count 1/3 to 1/2 of the surround as part of your piston area. in other words, if you have a 10" sub with a 1" surround you only have an 8" cone but you add 1/3 to 1/2 of the surround to get your total effective area the numbers "i no mad" is giving you are not accurate

OK well lets just put it simple if a thunk was 27 deep, 36 wide, and 15 high.. 2 15s would be the best or am i wrong?

 

[spencer321 10+ year member]

OK well lets just put it simple if a thunk was 27 deep, 36 wide, and 15 high.. 2 15s would be the best or am i wrong?

you have 6.87 ft^3 gross volume (before port/sub/bracing displacement) assuming the dimensions you gave me are max external.

with that kind of room the only 15's your going to be able to run are small volume 15's, the type R 15, sundowns Z15 and nightshade, treo ssi15, those are the only ones i can think of off the top of my head. You could run 3-4 12's depending on the 12's, a single 18... as far as maximizing cone area, you best bet would be to find a 12 that does well in 1.5 ft^3 ported and run 4 of them, 4 12's have more cone area than a single 18, 2-15's, 4-10's, if you can't run 4 12's, then 3 12's, 1-18, or 4-10's are all pretty close as far as cone area go. and run aero ports, take up less volume then slot ports usually

 

[pimpnyou204 10+ year member]

you have 6.87 ft^3 gross volume (before port/sub/bracing displacement) assuming the dimensions you gave me are max external.
with that kind of room the only 15's your going to be able to run are small volume 15's, the type R 15, sundowns Z15 and nightshade, treo ssi15, those are the only ones i can think of off the top of my head. You could run 3-4 12's depending on the 12's, a single 18... as far as maximizing cone area, you best bet would be to find a 12 that does well in 1.5 ft^3 ported and run 4 of them, 4 12's have more cone area than a single 18, 2-15's, 4-10's, if you can't run 4 12's, then 3 12's, 1-18, or 4-10's are all pretty close as far as cone area go. and run aero ports, take up less volume then slot ports usually

Sorry i know about slot ports but im not sure what a aero port is im sure i seen it but idk what it is.

Now from what i know about sound waves of subs is they basically carry out in all 'open' directions right?

What if i had 2 subs facing towards the front of the car and 2 facing the sides (V's equal subs.)

Then i make a dampening wall on the sides of the subs that face to the side to focus all the lows towards the front of the car? or was i told wrong lol

__|-----------|__

>

| |

| |

-V____V_-

 

[bass_lover1 10+ year member]

Sorry i know about slot ports but im not sure what a aero port is im sure i seen it but idk what it is.
Now from what i know about sound waves of subs is they basically carry out in all 'open' directions right?

What if i had 2 subs facing towards the front of the car and 2 facing the sides (V's equal subs.)

Then i make a dampening wall on the sides of the subs that face to the side to focus all the lows towards the front of the car? or was i told wrong lol

__|-----------|__

>

| |

| |

-V____V_-

Don't do that, you'll get everything all wet!!

Why is it that common misuse of a word eventually becomes proper?