4-12 VS 2-18 Comparison....

[SounDrive Pro Seller]

2-18's-

Will have more cone area, but will require a larger enclosure. I am looking at about 9.8 cubes net at max, might as well say 10 cubes close enough lol.

4-12s-

Will have more motor force, these will require less enclosure which will allow me to build a better suited enclosure for them which in turn would possibly wield better output and performance. With the space that i have at a estimated 9.8 cubes, it would more and likely better in the end.

Too small of a box for the 18s, after port displacement you'd be starving them

12s will have less motor force and more phase issues.. I'd recommend a pair of nice 15s

 

[bgowdy 5,000+ posts]

Too small of a box for the 18s, after port displacement you'd be starving them12s will have less motor force and more phase issues.. I'd recommend a pair of nice 15s

what do you mean by this

 

[mlstrass 5,000+ posts]

Do the 4 12's HDS200 or 300's. How much power will you have?

Did you see skip's vid of a 12" HDS300 doing a 52+ in the kick...

 

[SounDrive Pro Seller]

what do you mean by this

You don't add motor force together. More motors doesn't equal more motor force. Think of motor force as the amount of motor force per sub.

Motor force is sort of like efficiency.. More motors that are less efficient are still less efficient than fewer motors that are more efficient.

Also, the more subs you add the more cancellation due to phase you get. Notice how most SPL world champions don't use a crazy amount of subs. They use a small amount of really good subs.

 

[bbeljefe]

idk what brand of 12 yet i was just weighing out the differences. The more i thought about it the more the 12s made sense to me. Im looking for some cheap budget lower power 12s but havnt set on a brand just yet.

↑ This means it's pretty futile to compare 12s v 18s. You need to know which 12s against which 18s because not all 12s behave the same... likewise with 18s.

Two high xmax, strong motored 12s could outperform four low xmax, weak motored 18s. ;-)

 

[bgowdy 5,000+ posts]

↑ This means it's pretty futile to compare 12s v 18s. You need to know which 12s against which 18s because not all 12s behave the same... likewise with 18s.
Two high xmax, strong motored 12s could outperform four low xmax, weak motored 18s. ;-)

i see what you mean

 

---------- Post added at 01:46 PM ---------- Previous post was at 01:45 PM ----------

 

You don't add motor force together. More motors doesn't equal more motor force. Think of motor force as the amount of motor force per sub.
Motor force is sort of like efficiency.. More motors that are less efficient are still less efficient than fewer motors that are more efficient.

Also, the more subs you add the more cancellation due to phase you get. Notice how most SPL world champions don't use a crazy amount of subs. They use a small amount of really good subs.

i see

 

[bgowdy 5,000+ posts]

Do the 4 12's HDS200 or 300's. How much power will you have?
Did you see skip's vid of a 12" HDS300 doing a 52+ in the kick...

it will be be about 3k

 

[UGHH]

it will be be about 3k

4 HDS200 would be perfect on 3k

 

[mlstrass 5,000+ posts]

You don't add motor force together. More motors doesn't equal more motor force. Think of motor force as the amount of motor force per sub.
Motor force is sort of like efficiency.. More motors that are less efficient are still less efficient than fewer motors that are more efficient.

Also, the more subs you add the more cancellation due to phase you get. Notice how most SPL world champions don't use a crazy amount of subs. They use a small amount of really good subs.

I think you're confusing burp cars with the 30sec avg cars....

 

[SounDrive Pro Seller]

I think you're confusing burp cars with the 30sec avg cars....

180dB has been broken with a single sub.. I rest my case that fewer, high quality subs are better.. lol

 

[bgowdy 5,000+ posts]

180dB has been broken with a single sub.. I rest my case that fewer, high quality subs are better.. lol

i see your point but my system in no way is going to be a burp system. i build for music on TL(a 30 second car if you will lol)

 

[mlstrass 5,000+ posts]

180dB has been broken with a single sub.. I rest my case that fewer, high quality subs are better.. lol

Actually you just proved my point LOL OP is looking to do a 30sec avg class, NOT a burp. Butler burps loud, does he play music for 30sec???

Steve Mick plays music for 30sec very loudly...with 8 18's

 

[T3mpest 10+ year member]

Regardless eith only 3kw of power he can easily get away with 2 18s and save quite a bit of money over 4 12s and get very similar results. 4kw and up is where I would lean more towards the 12s.. has nothing to do with "motor force", it has to do with more coils having better heat dissipation, but most big boy subs, especially 4inch coils will be just fine on 1.5k. That's also why bass race cars use more subs, they have to move less overall vs a setup with less cone area and they don't get as hot as setups with less actual coil area. So lots of cone area and many coils work the best.. for daily budget pounding you can be in between and really just need to balance space, budget, quality concerns, and power available to find what's best..

I'm conservative when it comes to hoe much power to put on subs usually.. many cat audio subs can take a lot of power, but its because they are god awful at actually using the power to make sound.. super stiff suspensions and bug heavy coils.. I try to use subs that aren't like that, and use effecient boxes. On a 3inch coil I would not go over 1.5k.. sure some can handle up to 2500, but they tradeoffs they made to alloe it aren't worth it to Me.. if you want a musical sub to handle 2500 watts, it needs to be a 4inch coil.

 

[SounDrive Pro Seller]

Actually you just proved my point LOL OP is looking to do a 30sec avg class, NOT a burp. Butler burps loud, does he play music for 30sec???
Steve Mick plays music for 30sec very loudly...with 8 18's

More subs = more cancellation due to phase

Also, bigger box = less cabin volume which can often lose on the meter since a vehicle's interior is a bandpass enclosure of sorts

 

[bgowdy 5,000+ posts]

Regardless eith only 3kw of power he can easily get away with 2 18s and save quite a bit of money over 4 12s and get very similar results. 4kw and up is where I would lean more towards the 12s.. has nothing to do with "motor force", it has to do with more coils having better heat dissipation, but most big boy subs, especially 4inch coils will be just fine on 1.5k. That's also why bass race cars use more subs, they have to move less overall vs a setup with less cone area and they don't get as hot as setups with less actual coil area. So lots of cone area and many coils work the best.. for daily budget pounding you can be in between and really just need to balance space, budget, quality concerns, and power available to find what's best..
I'm conservative when it comes to hoe much power to put on subs usually.. many cat audio subs can take a lot of power, but its because they are god awful at actually using the power to make sound.. super stiff suspensions and bug heavy coils.. I try to use subs that aren't like that, and use effecient boxes. On a 3inch coil I would not go over 1.5k.. sure some can handle up to 2500, but they tradeoffs they made to alloe it aren't worth it to Me.. if you want a musical sub to handle 2500 watts, it needs to be a 4inch coil.

yea i actually spoke with @ram_designs about doing the 2 OA v2 18s in 10 cubes net with 3kw and a 10" aero port(my first thought on the port) and said it would work pretty well. I ended up changing and im thinking 2 8" aeros and that would give me around 10.x square inches of port per cube(Aeros call for smaller amounts of port(7-9 sq inches vs slots(12-16). But yea i was thinking the 12s but now kind leaning again toward the 18s lol