ohm question

[RangerFabWorks]

the comps and coaxials im look at are 2.7 ohn independance. can i run 2 ohms to them or do i need to runs 4 ohms to them. they are polk audio. reason im asking is the rms wattage im looking for is 100x4, so if i can run 2 ohms to them, then i dont need to be looking at big amps. but if i need 4 ohms, then i might as well bend over.

 

[exbass94]

The speakers are what determine the impedance. So, if the speakers are 2.7 ohms, then you are gonna have 2.7 ohms, period. You can't "make" them be 4 ohms, unless you wire 2 or more speakers on the same channel in series or parallel.

 

[RangerFabWorks]

nono heres what im asking, the speakers im looking at are 2.7 ohms independance, the amps im looking at are stable at 4ohms or at 2ohms. so im asking what are the speakers gonna be pulling. because the amps im looking at put out 90 watts rms at 4ohms or 125 watts rms at 2ohms. the speakers are 125 watts rms, so im just seeing how much wattage i need to be looking at.

 

[exbass94]

I would look for an amp that's rated at 200W rms at 2 ohms. It's better to slightly over-power the speakers than to under-power them. And since the speakers are 2.7 ohms, the amp will actually be putting out a little less than that anyway.

 

[flyingbrick]

Wrong wrong WRONG!! it is WAY better to UNDER-POWER anything!!! then over-power it.

 

[Ranger Sport Honduras]

no!!! better over power them, that way u can adjust the amp to what the speaker can handle, and u can have the extra bit of power if u need some more adjusting
if u underpower em the lack of powerwont let u get the best of em.

 

[Jay FX4]

I would agree that it would be better to have an amp that has more power than the speakers can handle. Just because an amp is capable of providing more power than the RMS wattage of the speakers can handle, doesn't mean you have to use it all. It would be better to have extra power and dial it back than to not have enough.

 

[baxtej44]

I would agree that it would be better to have an amp that has more power than the speakers can handle. Just because an amp is capable of providing more power than the RMS wattage of the speakers can handle, doesn't mean you have to use it all. It would be better to have extra power and dial it back than to not have enough.

and then also the amp will hopefully last you longer, as if you upgrade to a higher wattage speaker, you can just turn your gains back up to match and then you don't have to get a new amp too.


my thoughts exactly behind my sub/amp purchase.

 

[flyingbrick]

That's all fine and well till you get someone that's running a burned CD at only 32MB/S with a poorly recorded song, and the gain cranked and volume at full and then come back and ask why there speakers went pop. It's i guess a not so well known fact that you can feed a clipped signal to anything for hours if it is under powered, if you over power your speakers you can and will fry them faster.

 

[Jay FX4]

That's all fine and well till you get someone that's running a burned CD at only 32MB/S with a poorly recorded song, and the gain cranked and volume at full and then come back and ask why there speakers went pop. It's i guess a not so well known fact that you can feed a clipped signal to anything for hours if it is under powered, if you over power your speakers you can and will fry them faster.

That's not what we mean when we say "overpower". Not to intentionally exceed the speakers capabilities, but simply to have extra power available over what is needed.

 

[Ranger Sport Honduras]

 

[RangerFabWorks]

thanks for the help guys.

 

[flyingbrick]

That's not what we mean when we say "overpower". Not to intentionally exceed the speakers capabilities, but simply to have extra power available over what is needed.

OK so YOU may know what YOUR doing, this is a public forum, meaning anyone could click and see you saying it's better to over power then under power. so they go out and buy a 200 watt amp for 50 watt speakers, thinking it's OK cause you said so.
In my line of work you have to assume that the customer is a dumb@$$ and knows nothing, and there fore you always err on the side of caution.

 

[Jay FX4]

OK so YOU may know what YOUR doing, this is a public forum, meaning anyone could click and see you saying it's better to over power then under power. so they go out and buy a 200 watt amp for 50 watt speakers, thinking it's OK cause you said so.
In my line of work you have to assume that the customer is a dumb@$$ and knows nothing, and there fore you always err on the side of caution.

Well there are also three other people in this thread who are saying the same thing I did. Ideally, it would be best to pair an amp and speakers with similar RMS wattage specs. I'm simply saying that if you're going to be over or under by a few watts, it's okay to be over. You are right, you can't go wrong by being cautious, and there's no shortage of dumbasses in the world. But I would like to think that even an idiot would realize he's feeding the speakers too much power if the speakers are clipping/distorting, and would know to tweak the amp accordingly.

 

[RangerFabWorks]

Well there are also three other people in this thread who are saying the same thing I did. Ideally, it would be best to pair an amp and speakers with similar RMS wattage specs. I'm simply saying that if you're going to be over or under by a few watts, it's okay to be over. You are right, you can't go wrong by being cautious, and there's no shortage of dumbasses in the world. But I would like to think that even an idiot would realize he's feeding the speakers too much power if the speakers are clipping/distorting, and would know to tweak the amp accordingly.

you guys better not be calling me a dumb@ss, i know stereos. just had a question about ohms, still learning on them.