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Message: <blockquote data-quote="Z1NONLY" data-source="post: 7538176" data-attributes="member: 634086">The amp has to put 24.5 volts across a 4 ohm coil to generate 150 watts of power. (bridged, monoblock, ti-mode...whatever) 24.5 volts into a 4 ohm load = 150 watts.There is a remote possibility that the amp will cut the voltage in half when bridged an connected to a load, but I doubt it.You could tune the amp to a very low wattage, (25 watts) and then run the test tone to the speaker without changing the settings, and reading the voltage under load. (to see if the amp does something strange when bridged into a 4 ohm load)If the voltage stays relatively close with and without load, then simple ohms law is all you need.24.5 volts is the number you want to make 150 watts at 4 ohms.</blockquote>

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