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Uptone USB Regen, whose stock wall wart has been upgraded with a linear power supply, which I bought for $50 and which quieted down things considerably - a big improvement over the stock unit. Retail for the Regen was $175. Also included is the 6-inch male-male USB A/B cable and two male-male USB A/B solid adapter plug - one of them with a 90-degree twist and for which I paid $25. SOLD. Thanks for looking and holler with any questions.