Once Again - 3 x 12" XXXs or 2 x 15" XXXs

[Omarvelous 10+ year member]

OK guys....

I know i've asked this before...... that was then this is now!

Got an 04 Tahoe, don't want to COMPLETELY kill the trunk space.

If i get 3 x 12"s they will be each in a 3.4ft^3 chamber gross measuring 16"x 22" X 20"

Will give them each either 2000 - 2200 watts.

If i go with the 2 x 15" they will be each in a 5.5ft^3 chamber gross measuring 24 X 24 X 22

Will give them about 2400 - 2500 watts.

They will all have swappable ports.

I know either decision is going to mean a serious upgrade for the electrical, i'm prepared.

Will be doing car shows/competitions

ALSO later down the line will buy like an SX and maybe a MT, so based on the decision, it will either be a 12" or 15" so keep that in mind also.

I know the 12"s will cost more, so disregard that factor.

I think the 15"s will get louder, but the 1 12" i have now is GOOD enough, so i can imagine having 2 more, volume wise would be insignificant to me as opposed to having 2 15"s, in other words, louder doesn't matter to me in this case.

So thanks in advance

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[MrWizzard 10+ year member]

Did you ask a question? hehe

 

[supa_c 5,000+ posts]

louder doesn't matter to me in this case.

then keep your 12". 2 15's are nice.

 

[audioholic 5,000+ posts]

You listed things that dont matter (cost, space, loudness, etc), but you never really said what does matter. Not sure what you are wanting out of this system.

 

[RemlapaN 10+ year member]

3 12s will get louder than two 15s because you will have more surface area, and will be pushing more power into them than the pair of 15s.

The 3 12s will most likely have a better transient response than the 15s, so they are going to have better SQ on fast past bass rhythms.

 

[audioholic 5,000+ posts]

Larger drivers being slower is a myth, especially with today's high energy motors. I guarantee a 15" Brahma will play audibly just as fast as its 12" little brother, for example.

 

[BIG_SUPERMAN72 10+ year member]

3 12s will get louder than two 15s because you will have more surface area, and will be pushing more power into them than the pair of 15s.
The 3 12s will most likely have a better transient response than the 15s, so they are going to have better SQ on fast past bass rhythms.

i agree. Go with 3 12"s. or try 2 18"s.....

2 15"s thats weak. I try to not do what ordinary ppl do.

 

[jemorgan85 10+ year member]

3 12s will get louder than two 15s because you will have more surface area, and will be pushing more power into them than the pair of 15s.
The 3 12s will most likely have a better transient response than the 15s, so they are going to have better SQ on fast past bass rhythms.

Rethink the part in bold....

(3) 12's

3.14 x 6^2 = 113.04

113.04 x 3 = 339.12

(2) 15's

3.14 x 7.5^2 = 176.625

176.625 x 2 = 353.25

The dual 15 setup has the cone area advantage. Check the math.

Also, I'd like you to define transient response. If you made the above statement about surface area, I highly doubt you know what transient response is.

The 15's have a higher Mms, thus the 15's are able to play a bit lower, but that doesn't mean the transient response will be any worse than that of the 12's. Listen to a XXX 15, then tell me it can't keep up with the music. //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[BIG_SUPERMAN72 10+ year member]

i dont care bout the surface area factors. But 3 12"s will get louder. Espically if u gave them 2000 watts. Those babies would wang hard. Be a cool setup. Do 3 12" XXXs. One in the middle two pionting inward. Have ur amps mounted behind them. Put some neons around it. Tahoes are nice SUVs. 3 XXXs would look tight in there. But you gotta find the right Amps to push all that power for them.

 

[jemorgan85 10+ year member]

i dont care bout the surface area factors. But 3 12"s will get louder. Espically if u gave them 2000 watts. Those babies would wang hard. Be a cool setup. Do 3 12" XXXs. One in the middle two pionting inward. Have ur amps mounted behind them. Put some neons around it. Tahoes are nice SUVs. 3 XXXs would look tight in there. But you gotta find the right Amps to push all that power for them.

How much power would the 15's be getting....?

They already have a slight advantage over the 12's in terms of cone area and Vd. What alignments would each be in? If the power increase isn't significant, say a few more watts, there wouldn't be too much of a difference in terms of loudness....especially when you consider a 3 dB jump takes twice as much power. When calculating SPL theoretically it goes like this.....with the example of a driver with 90 dB sensitivity:

1 watt = 90dB

2 watts = 93dB

4 watts = 96dB

8 watts = 99dB

16 watts = 102dB

32 watts = 105 dB

64 watts = 108 dB

128 watts = 111dB

256 watts = 114dB

512 watts = 117 dB

1024 watts = 120 dB

2048 watts = 123 dB

This is for one driver.... If you were using three drivers, you would first add three decibels to the 90 for a 93.....then somehow figure in the other one...probably another 1.5 decibels.

 

[BIG_SUPERMAN72 10+ year member]

you and ur math lol. =)~~~ EVERYTIME .

 

[audioholic 5,000+ posts]

The cone area between the two setups is so close, I doubt any output difference would be audible, assuming both setups have proper power.

 

[BIG_SUPERMAN72 10+ year member]

Well if he puts atleast 2,000 in each of the 12" XXXs they are gunna be probably one of the best setups in his area. Espically ported in the back of a Tahoe.

 

[packerfan 10+ year member]

i agree. Go with 3 12"s. or try 2 18"s.....
2 15"s thats weak. I try to not do what ordinary ppl do.

Then go kill yourself

I would go wtih two 15s, more surface area and will cost less. Always a plus.

 

[BIG_SUPERMAN72 10+ year member]

2 15"s are for *******.

THE ONE I LOVE I HATE BUT THE *** IS GREAT. who sings this?