What is the sound difference between 2 ohms and 4 ohms?

Does the amount of Ohms in a sub have anything to do with the sound quality?

  • I am looking to replace a kicker 12" with a rockford 12" simply because the kicker puts out 150 watts at 4 ohms and the rockford puts out 400 watts at 2 ohms. I know ohms are just resistance or is there more to them. The rockford would be the best choice right? So basically, does a woofer at 4 ohms sound better than a woofer a 2 ohms? what the difference?

  • Answer:

    Speakers don't "put out" watts. They put out sound. When a speaker reads "150 watts" or "400 watts" in the specs, it's referring to how much power the speaker can handle; RMS meaning an extended amount of time, or continuously. "Peak" or "Max" means nothing. Ignore it. The impedance has no direct effect on how a speaker sounds. It's a measurement of the variable resistance over the specified frequency range the speaker is designed to reproduce. Basically, think of it as a gateway. The higher the impedance, the more resistance, and the less output (wattage) the amplifier can produce. The lower the impedance, the less resistance, and the more output (wattage) the amplifier can produce. Keep in mind, an amplifier has to have a certain amount of resistance applied to it to regulate the amount of current it produces. If you put 2 ohms of resistance on an amplifier that's only designed to have no less than a resistance of 4 ohms, the amplifier can overheat and become damaged. The goal is to obtain the maximum amount of wattage from an amplifier without damaging it. To accomplish this, a combination of speakers can be wired simultaneously to achieve the desired resistance simply by the number of speakers and the configuration of which they're wired.

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Other answers

Speakers don't "put out" watts. They put out sound. When a speaker reads "150 watts" or "400 watts" in the specs, it's referring to how much power the speaker can handle; RMS meaning an extended amount of time, or continuously. "Peak" or "Max" means nothing. Ignore it. The impedance has no direct effect on how a speaker sounds. It's a measurement of the variable resistance over the specified frequency range the speaker is designed to reproduce. Basically, think of it as a gateway. The higher the impedance, the more resistance, and the less output (wattage) the amplifier can produce. The lower the impedance, the less resistance, and the more output (wattage) the amplifier can produce. Keep in mind, an amplifier has to have a certain amount of resistance applied to it to regulate the amount of current it produces. If you put 2 ohms of resistance on an amplifier that's only designed to have no less than a resistance of 4 ohms, the amplifier can overheat and become damaged. The goal is to obtain the maximum amount of wattage from an amplifier without damaging it. To accomplish this, a combination of speakers can be wired simultaneously to achieve the desired resistance simply by the number of speakers and the configuration of which they're wired.

AJ Malmer

No, there's no variation in sound quality between subs of different impedances. The subwoofer doesn't "put out" watts; the power rating tells you how many watts the subwoofer can handle from the amplifier before the sub is damaged or produces audible distortion. Most amplifiers can produce more power with a 2-ohm sub than with a 4-ohm sub, but not every amplifier is stable with a 2-ohm load, and when you combine multiple subwoofers it changes the final impedance as well. That's why subs are available with different impedance ratings: you'd select the right sub so that your subwoofer system matches the amp's power output and preferred load impedance. Since we don't know anything about your amplifier, we can't say whether the Rockford sub is a better choice than the Kicker. For example, if you're using a 2-channel amp that's bridged to produce 150 watts, then the Kicker is a better choice. If you're using a 2-ohm stable mono amp, then the Rockford sub might be a better match.

KaeZoo

No, there's no variation in sound quality between subs of different impedances. The subwoofer doesn't "put out" watts; the power rating tells you how many watts the subwoofer can handle from the amplifier before the sub is damaged or produces audible distortion. Most amplifiers can produce more power with a 2-ohm sub than with a 4-ohm sub, but not every amplifier is stable with a 2-ohm load, and when you combine multiple subwoofers it changes the final impedance as well. That's why subs are available with different impedance ratings: you'd select the right sub so that your subwoofer system matches the amp's power output and preferred load impedance. Since we don't know anything about your amplifier, we can't say whether the Rockford sub is a better choice than the Kicker. For example, if you're using a 2-channel amp that's bridged to produce 150 watts, then the Kicker is a better choice. If you're using a 2-ohm stable mono amp, then the Rockford sub might be a better match.

KaeZoo

do yourself a favor and take a look at (www.rf tech woofer wiring wizard) and use this chart to wire your sub woofers and amplifier to a ohms load both can handle.the lower the ohms the more power from your subs and the bigger the hit on your charging system.if you have 2 4 ohm sub woofers and you use the chart to wire them its going to end up giving you 2 out comes either a 2 ohm load on the amplifier or 8 ohm load 2 ohms is what your looking for in this case because at 8 ohms your wasting some of your amplifiers power.use the chart before picking any sub or subs.

Charlie

The lower the ohm load (lower resistance) the harder that subwoofer is gonna pound. Believe me, I'ved bridged (bridging is a connection you run on a two channel amp to split the sub's resistance in half) my 4 ohm 12 inch Xplod to 2 ohms and it pounded HARD. Harder than 4 ohms. My recommendation is definitely go with a 4 ohm sub so when you do bridge it (if you can) it will lower it to 2 ohms. Bridging a 2 ohm subwoofer into a 1 ohm load will probably burn up your amp or blow the sub... If you plan on just hooking up an amp with your subs and don't really care about messing with it, go with 2 ohms. If you plan on getting subs that you can eventually bridge, go with a 4 ohm. Since your going with 1 single sub, I'd get a 2ohm, It will pound harder than a 4

Brian

The lower the ohm load (lower resistance) the harder that subwoofer is gonna pound. Believe me, I'ved bridged (bridging is a connection you run on a two channel amp to split the sub's resistance in half) my 4 ohm 12 inch Xplod to 2 ohms and it pounded HARD. Harder than 4 ohms. My recommendation is definitely go with a 4 ohm sub so when you do bridge it (if you can) it will lower it to 2 ohms. Bridging a 2 ohm subwoofer into a 1 ohm load will probably burn up your amp or blow the sub... If you plan on just hooking up an amp with your subs and don't really care about messing with it, go with 2 ohms. If you plan on getting subs that you can eventually bridge, go with a 4 ohm. Since your going with 1 single sub, I'd get a 2ohm, It will pound harder than a 4

do yourself a favor and take a look at (www.rf tech woofer wiring wizard) and use this chart to wire your sub woofers and amplifier to a ohms load both can handle.the lower the ohms the more power from your subs and the bigger the hit on your charging system.if you have 2 4 ohm sub woofers and you use the chart to wire them its going to end up giving you 2 out comes either a 2 ohm load on the amplifier or 8 ohm load 2 ohms is what your looking for in this case because at 8 ohms your wasting some of your amplifiers power.use the chart before picking any sub or subs.

Charlie

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