2 L7 15's vs. 1 RE MT 18"

[terra 5,000+ posts]

yesm....ok..next step is the right box.....?

 

[Lakota 5,000+ posts]

2200 rms is too much for the l7s....
Most people will probably tell you the 18 would be louder. But science proves them wrong. Your pushing the same wattage either way.

With an 18" Circular sub, you are gonna be moving ~254 sq. in. of air. With 2 15" squares, your gonna be moving 450 sq. in. of air, almost twice as much.

So.... you can either have 2200 pushin 254 or 2200 pushin 450. Id go with the 450. //content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif

But lower the wattage to 1500-2000.

You have a lot to learn buddy. I'm still a soph in college studying EE, but I know that cone area doesn't mean everything.

Also, check the sig and pay attention to the amp and sub.

 

[Lakota 5,000+ posts]

L7s for sure...
They have no problem getting loud off of 900 watts a piece...

They need quite a bit more than that imo:laugh:

 

[terra 5,000+ posts]

well im glad that no one can agree on this....awesome

 

[Lakota 5,000+ posts]

well im glad that no one can agree on this....awesome

I'd go with what delvryboy is saying since he has hands on experience with both subs and isn't going by b.s. theories.

 

[Foote 10+ year member]

I'd go with what delvryboy is saying since he has hands on experience with both subs and isn't going by b.s. theories.

You have a lot to learn buddy. I'm still a soph in college studying EE, but I know that cone area doesn't mean everything.
Also, check the sig and pay attention to the amp and sub.

cone area has nothing to do with it, eh? Then whats the differnce in a 8, 10, 12, 15, 18? Why would they not make them all the same size? Just to take up more room? no. I quote:

"the bigger the cone, the 'heavier' the bass. It's kind of like a xylophone. The higher notes are made of shorter bars whereas the lower notes are made of longer bars. "

"Subwoofers produce bass by moving large volumes of air. It makes sense then that a larger diameter speaker is going to be able to move more air than a smaller diameter speaker. "

And any company is going to rate their RMS as high as they can because it is good for advertisement. So, going over the rms isnt reccomended, ever. I told him to run between 750 and 900 watts per sub on subs rated at 1000 rms. That way, he will be able to play his system loud and not be worrying about damaging subs. (as long as he sets the gain before clipping-points)

So what part of any of that do you call my "B.S. Theories?"

I believe you said that the size area doesnt matter? Well it does. Because thats HOW subs make sound. The larger the area of the cone, the more air it moves, the more air moving, the louder the sound.

 

[casper97ta 10+ year member]

He said cone are isnt everything, and its not. The toxic bass guys hit 150db with two Rli-8's. There's people hitting high 40's all day with 8's in the right setup. You dont need massive amounts of cone area to be loud. so cone are isnt everything, how loud you'll be also depends on box design, install, build quality.. etc.

 

[hoodkid 10+ year member]

lol @ foote, I had 1200 watts rms daily going to just a 12in L7, I know a 15 inch L7 can handle atleast 1500 daily lol

 

[profundus-sanus 10+ year member]

cone area has nothing to do with it, eh? Then whats the differnce in a 8, 10, 12, 15, 18? Why would they not make them all the same size? Just to take up more room? no. I quote:
"the bigger the cone, the 'heavier' the bass. It's kind of like a xylophone. The higher notes are made of shorter bars whereas the lower notes are made of longer bars. "

"Subwoofers produce bass by moving large volumes of air. It makes sense then that a larger diameter speaker is going to be able to move more air than a smaller diameter speaker. "

And any company is going to rate their RMS as high as they can because it is good for advertisement. So, going over the rms isnt reccomended, ever. I told him to run between 750 and 900 watts per sub on subs rated at 1000 rms. That way, he will be able to play his system loud and not be worrying about damaging subs. (as long as he sets the gain before clipping-points)

So what part of any of that do you call my "B.S. Theories?"

I believe you said that the size area doesnt matter? Well it does. Because thats HOW subs make sound. The larger the area of the cone, the more air it moves, the more air moving, the louder the sound.

well, a reputable manufacture will create there rms ratings so that the sub won't stand a chance in melting a vc off that power. maybe you've been dealing with pyle and power acoustik too much lately or something..

and he said cone area isn't everything(which it isn't), not cone area is nothing.

 

[Grinder1989 5,000+ posts]

Great, a Kicker CotJones. ****.

 

[Foote 10+ year member]

He said cone are isnt everything, and its not. The toxic bass guys hit 150db with two Rli-8's. There's people hitting high 40's all day with 8's in the right setup. You dont need massive amounts of cone area to be loud. so cone are isnt everything, how loud you'll be also depends on box design, install, build quality.. etc.

I coulda sworn at first his post said it had "nothing to do with it." Or something along that line... //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

Oh well, my bad.

 

[dvrmstrng 5,000+ posts]

so whats the question now?

 

[Foote 10+ year member]

so whats the question now?

I believe now he wants to know about what kinda box to get for the 2 L7s

 

[05gliguy 10+ year member]

9cu ft., 2 chamber, tuned to 30-35 hz

 

[delvryboy 5,000+ posts]

8 cubes net, 2-3 6" aeroports, common chamber box. Well, if you want it to be loud and drop down to the low 30's......