Some more modern Class D amplifier designs (e.g., ICE Edge, Purifi, Hypex) do not share these limitations in sustained power testing. The maximum output of the AMPED 2400 also varies between 120 VAC ...

Class D audio amplifiers with single-ended outputs can exhibit a strange behavior, in which the power-supply voltage increases with power delivered to the load. Called “power-supply pumping,” it can ...