What is the RMS for Polk 700LS speakers? - AVS Forum
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post #1 of 9 Old 09-26-2013, 04:24 PM - Thread Starter
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I need to know the running power capacity for Polk 700LS speakers, http://www.polkaudio.com/products/700ls

I would also like to know the same for Niles CM7SI, http://www.nilesaudio.com/product.php?prodID=CM7SI&recordID=Ceiling%20Mount%20Loudspeakers&categoryID=Speakers&catcdID=1&prdcdID=FG01659

Thanks!
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post #2 of 9 Old 09-26-2013, 05:27 PM
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The specs for Niles are right there in your link. It tells you the recommended amp ratings. Thats all you should need.

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post #3 of 9 Old 09-26-2013, 05:42 PM
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Likewise, there is a "specs" tab on the Polk page you linked. The recommended range is similar. Normally such recommendations are continuous power ratings for the rated nominal impedance but unless they specify what the spec means hard to know for sure....

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post #4 of 9 Old 09-26-2013, 06:43 PM - Thread Starter
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I did not understand the maximum on the recommended range would be the recommended for continuous running power. I figured it may fall somewhere below the max range. Thanks.
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post #5 of 9 Old 09-26-2013, 07:03 PM - Thread Starter
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Should I get an amp that is 50% more power than the recommended max range? Sorry for the noob questions. I read in various places online to get 50% more amp power to avoid having someone blow the speaker?

I'm looking for amplifiers to drive each of these speakers at the nominal 8 ohms and not worry about them being under powered if someone cranks them (total 4 speakers = two polk 700ls 150 watt max range and one niles cm7si *stereo speaker 130 watt max range) .

Thanks.
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post #6 of 9 Old 09-26-2013, 08:13 PM - Thread Starter
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Would the OSD Audio AMP300 be a good option for these speakers? 2 channel, 150 watts per channel @ 8 ohms

Speaker A (L/R): 1 Niles CM7SI stereo speaker (L&R)
Speaker B (L/R): 2 Polk 700LS (one L / one R)
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post #7 of 9 Old 09-26-2013, 08:45 PM
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How big is your room?

Doesn't take much power to fill a normal sized room.

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post #8 of 9 Old 09-27-2013, 09:45 AM
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Room size is irrelevant. If room size was an issue, we could not hear out doors. What matters is listening distance.

Your Polks are 90db sensitive. 100w gets you 110db @3ft, and something between 98db and 104db at 12ft.
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post #9 of 9 Old 09-27-2013, 11:21 AM
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Quote:
Originally Posted by MethodX View Post

Should I get an amp that is 50% more power than the recommended max range? Sorry for the noob questions. I read in various places online to get 50% more amp power to avoid having someone blow the speaker?

I'm looking for amplifiers to drive each of these speakers at the nominal 8 ohms and not worry about them being under powered if someone cranks them (total 4 speakers = two polk 700ls 150 watt max range and one niles cm7si *stereo speaker 130 watt max range) .

Thanks.

You can still blow the speaker with too much power and you can do that with an amp that is within the continuous power ratings, too. Easiest way to avoid damage is to limit the volume before that happens, i.e. if you have someone around that can't help themselves and turns it up to 11 no matter what they're hearing, many receivers have a way of limiting max volume and you should set it up so that they can't. Read this amp faq http://www.avsforum.com/t/1294455/amplifier-faq

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