One 15'Inch L7 or 2 12"Inch L7?

Question

Ok the title says everything...

what is the better stuff?

in Sound

cheaper

i.e.

And.. what amp u guys recommend for the kids heheh? a class D?

And what is that stuff that says.. that i can put 2 subwoofers in one class D amp?

I mean.. if I have 2 subs with 1000wRMS each.. I should get an amp that pushes 2000wRMS? or one with 1000wRMS can handle in Max?

Thanks!

Answer 1

As far as sound goes, you're probably not going to notice much of a difference between the 15 and the 12.  The 15 may drop a little lower and may be a bit more efficient, but that's about it.

You can wire up as many subs to an amp as you like.  All you need to do is make sure you're staying within the parameters of the amplifier in regards to impedance.  

Just because a sub can handle 2,000 watts doesn't mean you have to push that many watts to it.  Depending on what you're shooting for, 600 watts may be plenty.  h**l, 600 watts for both speakers may be plenty.  You're information is no where near enough to make that determination.

Answer 2

when it comes to SPL (bass) the more surface area the better and two 12s is more than one 15 so you will be moving a lot more air

go with mono block amps for subs (1-channel) because they are made just for subs so they can handle the low notes better than a multi-channel amp and will run cooler and less likely to go into protection a lot also you need to go with companies that are CEA-compliant which means that the amp has been tested and produces or exceeds the advertised RMS wattage with minimum distortion (the main cause of sub damage) here are the CEA-compliant brands

Alpine

Bazooka

Blaupunkt

Clarion

Eclipse

Infinity

JBL

JL Audio

JVC

Kenwood

Kicker

MTX

Pioneer

Polk Audio

PPI

Rockford Fosgate

Sony

as far as the wattage just add up the RMS watttages and get an amp that has around the same RMS wattage at the correct impedance (ohms)

L7s are DVC subs so they can be wired to give you different impedances at the amp- here is a link to help you with that issue http://www.the12volt.com/caraudio/woofer... and the lower the final impedance at the amp the easier/cheaper it is to power but the lower the sound quality

and as far as RMS wattage matching

If you send too much power to your sub, you risk damaging it. The cone of the speaker and the mechanical parts that make it move may break under the stress. Surprisingly, too little power can also damage your subwoofer — in fact, it's actually more common than damage caused by overpowering.

When the volume is turned up and the amp doesn't have enough power, the signal becomes distorted, or "clipped." This distorted signal can cause parts of the speaker to overheat, warp and melt. Not good!

You don't have to match speaker and amp wattages exactly. An amp with a higher output than the speaker's rating won't necessarily damage the speaker — just turn the amp down a bit if you hear distortion from the sub and don't run the speaker at extremely loud volumes for lengthy periods. Likewise, you'll be OK with a lower powered amp if you keep the volume down and don't feed a distorted signal to the sub.

Answer 3

Well i have never heard a 15 inch L7 but if its anything like a round 15 inch, its gunna be mushy bass that "bleeds" the larger speakers get "lazy" and the bass tends to blend together. If you want loud *** bass and dont care so much about clarity, a 15 is pretty serious stuff.  The 12's should sound better, but again, I have never heard 2 l7's, most people run only one. The two 12's will be louder than the single 12, there is more cone area.

You will want a class D amp. They are very efficient in that most of the power that comes in goes out, more so then a class A/B where a good bit of the power coming in is dissapated as heat. Downside to class D amps is that they have more distortion, but it is really really difficult, nearly impossible to detect with subs. The lower the frequency the harder it is to detect distortion, which is why we all use class D amps for subs.

The thing you need to look at is the RMS rating at what ohm load. There are different ways to wire subs together, and yes, you can run two subs on one amp. The thing is, if you run two subs on an amp that pushes 1000 watts @ 4 ohms, you will only be getting 500 watts to each sub, theoretically.

I would look for an amp that is 2 ohm stable, because if your going for volume, 2 ohms is the way to go, 4 ohm loads on amps tend to produce cleaner sound, but again, bass is a funny thing. I Like JL amps, but they are spendy. MTX puts out a solid amp, not the greatest but if your going more for volume, they are great amps. Lots of power for a cheap price. Stay away from profile and off brand c**p like that. They are usually inefficient too.

talk to your stereo shop or some guys online wherever you are ordering it from and discuss what kind of subs you are getting, whether ur gettign DVC or single 2 ohm VC subs, your wiring options and a good amp to match it up.

Jim