What is the phse in an amplifier?

[asisrem 10+ year member]

Title says all...

Sorry, I messed up the title i mean phase

Click to read more...

 

[DidUHearThat? 10+ year member]

Phase is the flow of energy from positive to negative. Usually we say a speaker is in or out of phase . When someone says a speaker is "out of phase" (or phase "reversed"), that usually means the positive of the amplifer output is connected to the negative lead on the speaker, and the negative output of the amplifier is connected to the positive lead on the speaker.

When a normal audio signal comes thru, such as a kick drum sound, it makes the speaker pull inward first, instead of outward. If another speaker is wired correclty next to phase reversed speaker, especially a bass sounds, they can actually cancel the sound of each speaker, and you will hear almost no sound. If you unplug one the bass magically reappears. If they both move in the same direction, they will produce double the output, but if one moves opposite the other, you get nothing.

There is also a negative and postive power input on the amp, if you get that backward you will probably get smoke.

You could also wire the audio inputs into the amplifer out of phase, if you built your own cables and reversed the +/-, but if they are factory made cables this is not possible.

 

[FurbiesAndBeans 10+ year member]

Now it all makes sense. One time i wired one sub like normal, and the other out of phase in a monoblock (yes, stupid mistake) and i kept getting really soft sound. If i turned it up then my amp would go into protect mode.

 

[DidUHearThat? 10+ year member]

Now it all makes sense. One time i wired one sub like normal, and the other out of phase in a monoblock (yes, stupid mistake) and i kept getting really soft sound. If i turned it up then my amp would go into protect mode.

LOL! That is really easy to do if your not carefull about polarity when wiring your speakers.

You had each speaker working really hard... against each other. They were going full tilt, one pushing, one pulling. You heard almost nothing, but they were each working at full power.

 

[mil81 10+ year member]

Phase is the flow of energy from positive to negative. Usually we say a speaker is in or out of phase . When someone says a speaker is "out of phase" (or phase "reversed"), that usually means the positive of the amplifer output is connected to the negative lead on the speaker, and the negative output of the amplifier is connected to the positive lead on the speaker.When a normal audio signal comes thru, such as a kick drum sound, it makes the speaker pull inward first, instead of outward. If another speaker is wired correclty next to phase reversed speaker, especially a bass sounds, they can actually cancel the sound of each speaker, and you will hear almost no sound. If you unplug one the bass magically reappears. If they both move in the same direction, they will produce double the output, but if one moves opposite the other, you get nothing.

There is also a negative and postive power input on the amp, if you get that backward you will probably get smoke.

You could also wire the audio inputs into the amplifer out of phase, if you built your own cables and reversed the +/-, but if they are factory made cables this is not possible.

That is the non geek explanation. but it answered the guy's question so we'll go with that. LOL.

 

[DidUHearThat? 10+ year member]

That is the non geek explanation. but it answered the guy's question so we'll go with that. LOL.

Given how he wrote the question I didn't think he wanted to hear about time alignment and wave theory.

 

[mil81 10+ year member]

Given how he wrote the question I didn't think he wanted to hear about time alignment and wave theory.

You bet. Like I said, it sounded like his questions got answered just right. Nicely done.