HH, electronic audio equipment includes all the "power conditioning" necessary for meeting their performance specs. Designers are well aware of the nature of typical power supplies which will feed their products and take this into account. Transformers, rectifiers and filter capacitors in their power supply section take the incoming AC and output clean DC for use. So, the best "bang for the buck" power conditioner is the one you've already paid for in your 4311.

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Enjoy the music, not the equipment.