Review of the ultra trifecta by Steven Plaskin, Audio Stream

"SOtM has a great deal to feel good about with their new sMS-200ultra and sPS-500 Power Supply. This combination surpasses the sonic performance of the excellent sMS-200 and mBPS-d2s Intelligent Battery Power Supply while significantly improving the over-all sound of my Ayre QX-5 Twenty DAC.

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