A multi channel amplifier unit 2, wherein the DC blocking capacitance comprises {HEAD ~ a first DC blocking capacitor} between the second terminal of the load and {TAIL ~ a power supply terminal} and a second DC blocking capacitor between the second terminal of the load and ground 
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A multi channel amplifier unit 2 , wherein the DC blocking capacitance comprises { HEAD ~ a first DC blocking capacitor } between the second terminal of the load and { TAIL ~ a power supply terminal } and a second DC blocking capacitor between the second terminal of the load and ground
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