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Mimimum Power for a Speaker?

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Old 12-26-2006 | 06:16 PM
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Default Mimimum Power for a Speaker?

I'm installing some Infinity Reference 6.5s and it says they handle up to 180 watts peak power (60 watts RMS).

THIS is the head unit I'm using. The max power output is 50Wx4.

Right now I'm not planning on using an amp yet, but will this damage these speakers? Is there a minimum amount of power they need? Aren't you not supposed to go below the RMS watt rating?
Old 12-26-2006 | 06:24 PM
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I've got some reference 6.5s and I just use a head unit that is 45x4. I haven't had any problems. The only reason you would need an amp is if you want to drive them more without distortion from the amp. But for normal driving 45w is plenty of power.
Old 12-26-2006 | 06:35 PM
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It will be just fine.

You're not supposed to EXCEED the RMS value, for things can melt.

On the other hand, if you crank it up to the point of distortion, bad things can also happen (clipping=DC on the speaker=more melted goodness).
Old 12-26-2006 | 06:42 PM
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Good, I just wanted to be sure.

Alxdgr8: What did you mount the speakers to? Wood? 1/4", 1/2"? Did you flush mount the tweeters? (I'm assuming you installed these in the rear...)
Old 12-26-2006 | 09:18 PM
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Originally Posted by SpecialtyConcreteCoatings
Good, I just wanted to be sure.

Alxdgr8: What did you mount the speakers to? Wood? 1/4", 1/2"? Did you flush mount the tweeters? (I'm assuming you installed these in the rear...)
I actually haven't installed the 6.5's on the porsche yet. I had them in the doors of my Audi, and am sometime planning to put them in the rear of my porsche. I just got some reference 4x6 plates for the fronts for christmas
Old 12-26-2006 | 09:45 PM
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Quality of the amp is far more important than the wattage rating.

I was running a 250 rms amp into a pair of speakers rated at 100watts peak for years, never had any issues. Underpowering a speaker will damage it in the form of distortion more than an amp with more power than a speaker is rated for.
Old 12-26-2006 | 10:14 PM
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Just so ya'll know, the output ratings on head units are complete BS. You'd be hard pressed to get 20 REAL watts per channel out of ANY had unit made. For power, external amps are the way to go if you can.

That said, there is no substitute for clean power. As long as the head unit puts out clean undistorted power and you don't crank it to 11 you'll be fine.
Old 12-26-2006 | 11:02 PM
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I have the same head unit running infinity kappa 6.5s in the rear - it's fine.
Old 12-29-2006 | 12:47 AM
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These guys speak true. You can damage a speaker with very little power if that power is distorted. Keep the volume below distortion and you're fine.

An external amp will change your world.



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