MadMax07SL

My question, is it going to be worth upgrading to this 2 ohm Rockford Fosgate Sub from the 4 ohm JL Sub? Will the extra wattage be noted considerably with the lower resistance, or will it be just a little bit better? I've never used 2ohm speakers before, so I'm skeptic about the difference...thanks up front for your insight.

Here's the Amp I'm using:

JL Audio XD600/1
http://www.crutchfield.com/p_136XD60....html?tp=35834






Here's the current Sub:

JL Audio 12W3v3-4
http://www.crutchfield.com/s_13612W3...-4.html?tp=111



Here's what I'm considering getting, have a $100 off coupon for RF

Rockford Fosgate P3D212
http://www.crutchfield.com/s_575P3D2...12.html?tp=111

nismos14

iTrader: (56)

Yes you'll have more power to it, it doesn't mean it will be louder though. It will also sound different for sure.

MadMax07SL

Thanks for the input. I was hoping to hear from others as well.

Anyone else with some experience? Would I be wasting my money to migrate to 2 ohm, or would it be something I could actually see some benefit from?

life-rocks

Your Current Sub Is Single 4 Ohm Voice Coil,
The Sub that you are wanting to Upgrade to has (2) 2 Ohm Voice Coil(s).
Your Amp will only hold a 2 Ohm Load....

If you wire the New Sub in Parallel you will have a 1 Ohm Load on your amp.
(this is a Bad Thing)
If you wire the New Sub in Series you will only have a 4 Ohm Load.

I would try and Find a 12" DVC Sub,
That has (2) 4 Ohm Voice Coils,
Wire them in Parallel (for a 2 Ohm Load)....

Yes this will be Louder, Sound Better, Hit Harder....

You are running at least 4-Guage Power Wire???

MadMax07SL

Cool, so what you're saying is the P3D412 wired as below is the way to go to get the 2 ohm load?

http://www.rockfordfosgate.com/produ...9&locale=en_us

life-rocks

Now You are On The Right TRACK!!!

MadMax07SL

You got me there, thanks dude.

locknuts27

iTrader: (2)

Please explain to me how RF has more power than the JL? Dual voice coi(RF)l, 250 per voice coil equals 500 watts which is same power as 500 watts at 4 ohms for JL. Anyways!!!

Stay with the JL and save your doh!

ride2wheels

Has to do with the bridging of the amp. You can only run a 4ohm load with a single 4 ohm speaker where as if you have dual voice coil you can run a 2 ohm load, bridging the amp allowing more watts.

http://a248.e.akamai.net/pix.crutchf..._4-ohm_2ch.jpg
http://a248.e.akamai.net/pix.crutchf...4-ohm_mono.jpg

locknuts27

iTrader: (2)

I understand what you are saying but if both of the speakers are set for 500 watts rms then it really doesn't matter. Dvc is 250 watts per coil so what difference would tba make? 500 watts is 500 watts!

locknuts27

iTrader: (2)

Amp is rated 400 watts at 4 ohms n 600 watts at 2 ohms Not really doubling the power but ur right more power.

MadMax07SL

Add to that, (at least from my understanding here) the wattage would be the same to both voice coils because of the bridge between the coils, meaning I'd be at 600 each, not 300...

Also note, the amp isn't 2 channel, it's mono, single channel. I can't even hook up each coil to a different channel, so there should be no reduction of wattage...

Or am I missing something here?

MadMax07SL

In the end, the idea was to get the 2 ohm load so I can get the full 600 watts from the amp, however it's distributed at the coils.

locknuts27

iTrader: (2)

If you want to run it in 2 ohm bridge mode you are going to have to buy 4 ohm dvc sub not 2 ohm dvc sub.

Rods03Max619

iTrader: (5)

Yeah I can say it will be better don't got the 2 ohm but a 4 P3 Fosgate older model but still 500 watts RMS 1000PEAK AND IT IS PLENTY FOR MY TRUNK NEED SOME DYNOMAT JL IS G BUT FOSGATE PRICE AND QUALITY CAN HANG WITH THE BEST SEE IF YOU HAD THE W7. THEN stick with that

nismos14

iTrader: (56)

YO DATS RIGHT DAWG, CAPSFTW.

locknuts27

iTrader: (2)

Huh? Fragment sentences killing me man!

locknuts27

iTrader: (2)

Well no your speaker will see 250 watts per coil thus equaling 500 watts (I could be wrong but won't be the first time). But what you are missing is that you are looking at 2 ohm dvc which can't run 2ohms to both coils. If you run them in parallel your impedance drops to 1 ohm and if you put them in series it jumps to 4ohms so you will need different speakers. Sorry Johnny!

MadMax07SL

If you look back up around post 4 and 5, "life-rocks" actually talked me out of the 2 ohm speaker, and into the 4 ohm DVC for the same reasons.

Thanks for the input though, it's all new teritory for me.

locknuts27

iTrader: (2)

Yeah I saw that too! What are you trying to achieve with ur set up?

MadMax07SL

Just more power with the same amp. I didn't know about DVC back when I got the JL speaker. I'm curious if I'll notice the difference, and it should be a quick install. It was because I had a $100 off coupon for the Rockford products that's why I went that route. A $250 speaker for about 40% off, can't go wrong...

Anyway, I'm still debating if I want to do it, if it's going to be worth it...

SteveB123

iTrader: (2)

That's not really a goal in itself.
With a 2 ohm impedance, you'll have a higher power peak potential from your sub amp.

Is your current sub amp clipping?
Can the rest of your system handle a higher output without upgrading?

locknuts27

iTrader: (2)

Potential or actual continuous power increase? Going from 4 ohms to 2 ohms definitely will increase the powerof the amp.

locknuts27

iTrader: (2)

Potential or actual continuous power increase? Going from 4 ohms to 2 ohms definitely will increase the power of the amp.