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TAS6584-Q1: 4Ω BTL Output Power, THD+N Measurement, Test Setup Inquiry. Are All Channels Loaded?

Part Number: TAS6584-Q1
Other Parts Discussed in Thread: TAS6584Q1EVM

I have an amplifier project in development right now using the TAS6584QPHDRQ1 amplifier chip. In the output power section of the electrical characteristics table in the datasheet for this component it lists the spec for PO_BTL "Output power per channel, BTL" under the test conditions "PVDD = 45V, 4Ω, THD = 1%, TC = 75°C" to be 180W Minimum and 215W Maximum. My question is about if this power number was captured with all channels loaded and driven at the same time, or just one channel.

Any information you can provide me about the test setup for the PO_BTL "Output power per channel, BTL" under the test conditions "PVDD = 45V, 4Ω, THD = 1%, TC = 75°C" would be greatly appreciated.

Thank you in advance.