Subwoofer ?

bjblackout

Why would you go with 2 Ohm over 4 Ohm?? Obviously talking about impedance..

Thanks in advance guys

bigaudiofanat

If the amp is stable at 2 ohms you can get more power from it.

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MacLean

+1........

bjblackout

Sorry but I am an idiot when it comes to this. So should I buy 2 or 4 ohm. Is one better than the other? Not sure what u mean by stable

XwChriswX

Think Stable = Safe. Your amp isn't over working or going outside of its threshold of power production.

The lower the resistance (ohms) the more power that can be pushed (watts) = More volume!


This is why when you see Amp power listings, they are broken down by Ohms.
For instance, my Kicker KX1200.1 amp right now has a power rating of:

1200 Watts @ 1 Ohm (Stable)
600 Watts @ 2 Ohms
300 Watts @ 4 Ohms

Notice how the power is dropping? That added power is being used to push through and is being resisted. To put it simply, you want a lower Ohm rated sub, but make sure that your amp is Stable at that Ohm rating. And that the power it's able to push at that impedance is within the limits of your sub.


Big please step in and correct anything I might have goofed on or omitted. This is how it's explained to me, but please correct me if its wrong.

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bjblackout

So it sounds to me a 2 ohm would be better than a 4 ohm.

XwChriswX

Yes..

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90 ST

No, not true.

The ohm's of a sub doesn't matter, what matters is that you match it to the amp. a sub that is 2 ohm should be matched with an amp that makes it's most power at 2 ohms.

XwChriswX

Which is a more in depth answer than what I posted, but the conclusion I was figuring he'd come to.

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90 ST

half of the info for an answer just confuses noobies.

XwChriswX

My bad then. I figured that part of the info might answer itself...

I have a coworker who just dropped some cash for a 'paired' sub/amp combo from another guy. The Amp barely pushes enough power for one sub, let alone the dual sub box he has. Then they used Speaker wire for power wire.

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Wicked CAS

It is very important to match the subwoofer to your amplifier.

If you are using a MONO amplifier, most new designs will give you the most amount of power they are capable of producing at 2 ohms... If you have one of these amps then you want a 2 ohm subwoofer.

If you have let's say a 2 Channel amplifier and you will be bridging it to a single channel amp and in the specs it says something like
75Wx2 at 4 ohms per channel
100Wx2 at 2 ohms per channel
200 Watts X 1 at 4 ohms bridged... Then you want a 4 ohm sub.

If you run a 2 ohm sub on an amp that is designed to be at 4 ohm, you will overheat the amp and in most cases amp will hit protect mode and shut down...

If you use a 4 ohm sub on a MONO amp designed for 2 OHM for the most amount of power, you will only use that amp at about half the power it can otherwise produce.
For example rating will be "250 Watts @ 4 ohms" or "350 Watts @ 2 ohm" in this case you want a 2 ohm sub.

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bjblackout

If it matters I am using a 5 channel JL amp

Wicked CAS

Look at the specs of the subwoofer channel, most likely the 5th channel and see what it says for impedence.

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