Watts don’t come out of speakers.
That's your prob.
Are you trying to measure loudness, i.e. debibels?
Either way, enjoy that KILL A WATT.
https://www.amazon.com/dp/B01EZZ8B5Q/ref=cm_sw_r_cp_apa_fabc_8Vm6FbCMBYRTQ?_encoding=UTF8&psc=1
That's your prob.
Are you trying to measure loudness, i.e. debibels?
Either way, enjoy that KILL A WATT.
https://www.amazon.com/dp/B01EZZ8B5Q/ref=cm_sw_r_cp_apa_fabc_8Vm6FbCMBYRTQ?_encoding=UTF8&psc=1