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Group buy: TPA3251_TPA3255 Amplifier board and ADAU1701 DSP Pre-Amp board

Is one EAPST-0400-48-A enough to drive 2 EAUMT-0260-2-A?
it depend what power level you want to achieve.
normally we calculate:
smps power = 1/8 of maximum power(1/3 in pro-audio)
260W/8/0.85(efficiency)=38W per channel.
4 channel total will be around 152W.
sure,if use 2 smps to drive the amp separated,you will get more headroom and less thermal on the smps.
it depend on design case by case,and also budget in another word.