will these amps work please help

kornholio788 · Post by **kornholio788** » Mon Jun 12, 2006 7:05 pm

ok i have purchased/will be purchasing 2 4ohm JL Audio 12w0 subs there are twelve inches. Now i have one Dual ilumminite series amp that puts out 460 watts i want to buy another one and use two amps one amp per sub will the be ok will the subs be hitting kinda hard i am putting them in a custom built sealed encloser not sure how big cuz i still have to look that up but i want to know about the amps or should i just stick with one cuz two wont do anything

here is the info

Sub:
The 12W0 is a potent 12-inch subwoofer designed to extract maximum performance from small to moderate power levels. Highly flexible in its application, this speaker works extremely well in sealed, ported and even bandpass designs.

Nominal Diameter: 12 inches (300 mm)
Continuous Power Handling: 125 Watts
Voice Coil: 1.38" diameter, 6-layer, Kapton former
Available Configurations: 4 ohm or 8 ohm (Single Voice Coil)
Xmax (one-way, linear): 0.34" (8.6 mm)
Sealed Enclosure Range: 1.00-1.75 cu.ft. (28.3-49.5 liters)
Ported Enclosure Range: 1.75-2.75 cu.ft. (49.5-78.0 liters)
VRC™ Technology: YES

Amp:
100 Watts RMS x 2 channels at 4 ohms and < 1% THD+N
Signal to noise ratio 76dBA (reference: 1 watt into 4 ohms)
Additional power output
145 Watts RMS x 2 channels at 2 ohms and < 1% THD+N
300 Watts RMS x 1 channel at 4 ohms (bridged) and < 1% THD+N
Dynamic power 460 Watts at 4 ohms
Frequency response 20Hz~20kHz (-3dB)
Maximum input signal 6V
Minimum input signal 200mV

Any help would be great thanks alot

Dan

Nick Drake · Post by **Nick Drake** » Mon Jun 12, 2006 7:08 pm

Whatever that amp you listed there, you could run both the subs off that one. You're pushing it a bit but it'll work. My subs are 20 watts RMS underpowered and they hit like MAD.

So to sum it up, just one amp will work for you.

blue demon02 · Post by **blue demon02** » Tue Jun 13, 2006 9:41 pm

It will work but it won't be verry loud at all. If you are looking for a decent amount of bass get two.

kornholio788 · Post by **kornholio788** » Tue Jun 13, 2006 10:33 pm

are you sure blue demon because everyone else has told me that one is fine and two would be way too much power to those subs the subs should only be getting like 125 watts so putting 460 to both would probably be bad for them and i am not going to ruin my jls i have waited too long for them to ruin them

Nick Drake · Post by **Nick Drake** » Tue Jun 13, 2006 10:55 pm

kornholio788 wrote:are you sure blue demon because everyone else has told me that one is fine and two would be way too much power to those subs the subs should only be getting like 125 watts so putting 460 to both would probably be bad for them and i am not going to ruin my jls i have waited too long for them to ruin them

I think he was talking about getting 2 subs instead of 1. You'll be fine with one amp and 2 subs. I have 2 12's that are 125 rms and they're only getting a little over 100 rms from my amp and it's PLENTY loud.

edit:

I just noticed that my subs are actually rated for 200 watts, and getting 180. (both 4 ohms)

But I still think just one amp will sound fine with those subs.

eastwoodsn352 · Post by **eastwoodsn352** » Tue Jun 13, 2006 11:21 pm

just make sure whatever amp u get is CEA compliant....this means ur getting how many watts the company says the amp is putting out or something very close to what it says. i paid $349 for the thunder 502 *i believe it was 502...50x if it wasnt 502* it was a 500 watt amp and when it was bench tested it put down 486 watts. try that with a POS sony amp

blue demon02 · Post by **blue demon02** » Wed Jun 14, 2006 10:28 am

eastwoodsn352 wrote:just make sure whatever amp u get is CEA compliant....this means ur getting how many watts the company says the amp is putting out or something very close to what it says. i paid $349 for the thunder 502 *i believe it was 502...50x if it wasnt 502* it was a 500 watt amp and when it was bench tested it put down 486 watts. try that with a POS sony amp

Exactly just because the amp says it puts out 300W RMS doesn't mean it acttualy does. I'm using a 2 Channell A/D/S amp and its rated at 2X150 and I'm using it to power a MB-Quart Q dual coil 4OHM 10". I tried the same SUB with several differant AMPS and none of them hit as hard as the A/D/S. I have a cheap Wolfgehagen (SP) amp that is rated at like 750W RMS and its about half as loud as the A/D/S.

He said in his first post that he was getting 2 subs. and the amp he is getting is rated at 300W RMS into one chanell split that in half and unless its a high quality amp which I doubt it can touch a A/D/S in quality. There is no way it will push those two SUBS decently.

blue demon02 · Post by **blue demon02** » Wed Jun 14, 2006 11:21 am

Ok, just looked up the price of that dual amp and its about almost 500 less then the retail on the A/D/S amp I'm using so I would highly doubt it can touch it. It might be close to as loud but why would you want to hear it.

kornholio788 · Post by **kornholio788** » Wed Jun 14, 2006 5:20 pm

okay thanks for the info and ya it is just a dual amp so i am doubting that it really puts out that much so do u guys think i should still just stick with one or should i grap two and put one amp to one sub for both subs

Nick Drake · Post by **Nick Drake** » Wed Jun 14, 2006 8:34 pm

Nick Drake wrote:So to sum it up, just one amp will work for you.

Nick Drake wrote:You'll be fine with one amp and 2 subs. I have 2 12's that are 125 rms and they're only getting a little over 100 rms from my amp and it's PLENTY loud.

blue demon02 · Post by **blue demon02** » Wed Jun 14, 2006 10:21 pm

Nick Drake wrote:
Nick Drake wrote:So to sum it up, just one amp will work for you.

Nick Drake wrote:You'll be fine with one amp and 2 subs. I have 2 12's that are 125 rms and they're only getting a little over 100 rms from my amp and it's PLENTY loud.

Aparently you have no concept of car stereo.

Just because your 12" subs are getting just over 100 watts doesn't mean a damn thing. What kind of amp are you using? What kind of subs are they? What kind of inclosure are they in? Are you using a CAP? Are they subs 2 ohm or 4. Are they running of a Amp rated at 100 watts at four ohms? Or a amp rated for 200 watts at 2 ohms?

Talk about the blind leading the blind.

Dual amps are cheap Amps. A friend of mine had a P series Rockford amp pushing 2 JL 10w0. Each subs where getting around 250 watts RMS at 4 Ohms and they where not all that loud. My one 10" Cove Armagedin (SP) sub that I had in at the time with my A/D/S amp was almost twice as loud. I assure you that Rockford amp is much better an amp then those Dual amps are.

When ever your installing and tunning your system you should never set the gain higher then 75 percent of the way up. If you have to set it any higher to get a decent vollume then go get a bigger amp. If you crank an amp all the way up you will blow it.

blue demon02 · Post by **blue demon02** » Wed Jun 14, 2006 10:38 pm

To answer your question try it with just one at first. If the amps lights are dimming real bad and if the subs sound real distorted then go get another amp.

if your looking for an amp to push those subs to the point of distruction grab this one you will not be disapointed:
http://www.onlinecarstereo.com/CarAudio ... ctID=11691

http://cgi.ebay.com/10-500w-A-D-S-A10s- ... dZViewItem
that and i would get that sub over the JL's anyday. I had one of those and it was an eight in a bandpass. and it was louder them my friends two 12 inch kenwood subs, I forget wich model they where.

Nick Drake · Post by **Nick Drake** » Thu Jun 15, 2006 2:12 pm

His subs' specs say 100-150 watts RMS (4 ohms) is nominal.

His amp's specs say "100 Watts RMS x 2 channels at 4 ohms and < 1% THD+N".

BAM. There you have a decent system for someone who isn't totally into having the loudest booming system in his area.

blue demon02 · Post by **blue demon02** » Thu Jun 15, 2006 3:39 pm

Well its up to you. I say two. I will further add that if you do go with one I bet it will shut off all the time and blow with in a year.

You can trust me or nickdrake.

kornholio788 · Post by **kornholio788** » Thu Jun 15, 2006 4:03 pm

thanks everyone and i appriciate the reccomondation on the amp but that is just a little pricey for me any amps in the like say 150 range that are decent that would work good for these subs

Nick Drake · Post by **Nick Drake** » Thu Jun 15, 2006 4:16 pm

You've been PM'd because this is turning into a drama fest.

kornholio788 · Post by **kornholio788** » Thu Jun 15, 2006 9:32 pm

You can trust me or nickdrake. I bet me Amp/Sub costed more then his whole system.

Look i appriciate your help and everything but i cant afford stuff i dont have that kind of cash to spend like you maby one day but not now i need to pay for college so best system isnt an option now. Right now it is ALRIGHT system k thanks alot though for your help

blue demon02 · Post by **blue demon02** » Thu Jun 15, 2006 11:23 pm

kornholio788 wrote:
You can trust me or nickdrake. I bet me Amp/Sub costed more then his whole system.
Look i appriciate your help and everything but i cant afford stuff i dont have that kind of cash to spend like you maby one day but not now i need to pay for college so best system isnt an option now. Right now it is ALRIGHT system k thanks alot though for your help

I understand.

Most people don't care how crisp the thumps are or how close to the the real thing do they sound. Most people want to hear the bass. And most won't listen to the bass and go "No that sounds more like a Clasical bass beat then a rock bass beat". Most people just don't care.

The thing I would be concerned with more is will the amp go boom?

NicDrake very well could be correct on that it will work. What I would be concerned with is for how long will the amp last. Being that your on a budget the last thing you want to do is spend the money and then have it blow up in six monthes because you pushed the amp to much.

Found a few sights that have good prices.
http://www.hifisoundconnection.com/Shop ... /SFV/30046
http://www.caraudiodeals.com/index.php
Here is a nice package deal: If it where me and I was lookin for the best bang for the buck that would be it. AudioBahn has been around for a while an makes preety good stuff.
http://www.caraudiodeals.com/product_in ... cts_id=624

EDIT: like this deal better not a big fan of bandpass boxes.
http://www.caraudiodeals.com/product_in ... cts_id=623

Ok, in closing general rule of thumb when you have a Sub that is rated at 150W RMS Send 300W RMS to it. both your amp and Sub will be happy.
Go to www.sounddomain.com go to the Forums people there are asking much the same kind of questions you are. Will get much more expearianced people down there that eat breath and sleep car stereo and they can give you real good info.