I have a 100W BT20A-S model and am using it to power a pair of Polk RC80i ceiling speakers under my pool area patio. I've had it for almost a year. Great Bluetooth connectivity and range. I installed it in the upper part of the kitchen pantry under the ceiling. Good performance outside very little distortion good sound. I haven't been able to find anything in the literature that says if the power rating is peak power or RMS power. I believe those are peak watts, so 100 watts peak is 70.7 watts RMS. This goes well with the POLK speakers I mentioned.
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