Powering my RTiA9 speakers

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Would like to bi-amplify my Polks, but curious about power. I have 2 Luxman M-120A amps in the shop getting recapped, but have now aquired a 3rd M-120A. I will be using the recapped amps in BTL for 300 watts and wondered if using the 3rd amp @ 2x120 for the upper section would work. I am looking at another M-120A that is for sale, but curious if 2 amps @ 300 watts per side is just a waste of power. I guess I am wondering if 300 watts to the mid/tweeter array is just stupid overkill. Thanks, MusicinOz

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