If amp is bridged at 4ohm, do i wire sub to 4ohm?

[mrpep]

I was told that just because you bridge to 4 ohm it doesn't mean that you have to wire the dvc sub to 4ohm. I was told that wiring the dvc to 2 ohm would actually get me more power from amp, True?

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[macsdad 10+ year member]

If you have a monoblock amp, then yes to 2ohm. but since you're asking about bridging channels, probably not. Most stereo amps are not 2ohm stable when bridged.

 

[Umbra]

I was told that just because you bridge to 4 ohm it doesn't mean that you have to wire the dvc sub to 4ohm. I was told that wiring the dvc to 2 ohm would actually get me more power from amp, True?

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The load placed on the amp dictates it's output. You typically bridge an amp by wiring the sub(s) to specific terminals. You "set" it to 2 or 4 by presenting it with a 2 or 4 ohm final load; it's not an amp setting. Typically you'll get more power with lower impedance, so you'll get more power at 2 compared to 4. That's assuming the amp can handle it. Trying to run an amp at a lower impedance than it was designed will create excess heat, probably put it into protect mode, or possibly blow the thing.

 

[blazian87 10+ year member]

What amp are we talking about? Some are 2 ohm stable and some aren't. I had an oldschool rockford where it did more power at 4 ohms bridged than it did 2 ohms.

 

[mrpep]

So of I bridge the amp to mono 4ohms and wire the single sub dvc to 2 ohm it should receive more ,if the amp can handle ? How do I know if the amp can handle ? Can I damage amp?

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---------- Post added at 06:05 PM ---------- Previous post was at 06:04 PM ----------

 

It's actually a power amp for home or DJ. It's a peavy cs800x

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[mrpep]

The manual states bridge at 4 ohm , something tells me I should wire dvc to 4ohm to play it safe

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[Umbra]

The manual states bridge at 4 ohm , something tells me I should wire dvc to 4ohm to play it safe

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You bridge the amp by connecting something to it at certain terminals , pooling the power of two channels into one. You just bridge it, you dont set it to 4, 2, or anything else. The ohm value comes from the speaker or speakers youre connecting to these two terminals.
Whether or not you can bridge it at 2 ohms depends on your amp. If it says does x @ 4, but doesn't mention 2 it most likely can't handle being wired that low. Yes, you can damage the amp.

If it's a dvc sub make sure you're utilizing both coils, Don't just use one. A 4 ohm dvc can be wired to 8 or 2, a 2 ohm Dvc can be wired to 4 or 1.

 

[frogcase2002 10+ year member]

You cant wire your dvc sub to 2 and 4 . What ohm is your sub?

 

[mrpep]

The sub can do either but I took a look at the amp manual and it specifies 4ohm minimum so I will leave it at 4. I ask because the guy I bought it from talks like he knows his stuff and told me to wire it to 2ohms, good thing I don't always listen , lol.

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[Umbra]

The sub can do either but I took a look at the amp manual and it specifies 4ohm minimum so I will leave it at 4. I ask because the guy I bought it from talks like he knows his stuff and told me to wire it to 2ohms, good thing I don't always listen , lol.

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You can't wire the voice coils together on one sub to get both 2 and 4.

If you have 1 ohm coils you get .5 or 2

2 ohm gets you 1 and 4

4 gets you 2 and 8

There are more coil configurations, but the same mathematical formulas apply.

If you're interested in learning all about this topic, check out this link: Series Parallel Speaker Impedance

 

[frogcase2002 10+ year member]

Need to stop listening to the person telling you about audio

 

[frogcase2002 10+ year member]

How do you have your sub wired and what ohm is your sub . . Whats the make and model also

 

[mrpep]

Thank you guys for responding and I should of gotten back to you guys but I got my answer from the manual. It's a 4 ohm minimum

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[shizzzon 10+ year member]

About your question-

The amplifier is "wired" to what the sub is wired to, NEVER the other way around.

With no speaker on an amplifier, an amplifier does not have a load, therefore has no restrictive impedance value.

Taking a dual 2ohm speaker and wiring in series to 4ohm and connecting it to an amplifier will be wired to 4ohms.

Is this is a 2 channel amplifier, wiring the sub to one of two channels is considered 4ohm wired Stereo (more than 1 channel present on amp, but only wired to a single channel)

Taking same sub and wiring to the amplifier in a bridged pattern will be wired at 4ohm bridged. On a 2 channel amp, this is the absolute maximum power capable based on an amplifier that is only 2ohm stereo stable.

 

[frogcase2002 10+ year member]

Thank you guys for responding and I should of gotten back to you guys but I got my answer from the manual. It's a 4 ohm minimum

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I understand you got your answer about the amp but why do you think your sub can be wired at 2 or 4 . We are trying to help. If you dont understand ohms than how do you even know you have it wired to 4 ohms