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I am not sure what you mean by watts. The sensitivity of the speakers are 88dB. My amplifier has 150 watts/channel. The speakers "coast" with this amp. Good to listen to them at the store with the amp output you have at home.
Sorry, there was a problem. Please try again later.The manufacturer recommends 15 - 250W of amplifier power for this speaker. Source: https://us.kef.com/r7.html
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