I am currently listening to a 581 and couldnt be happier this is my fourth starting with a 860 to x to 861 they all show a suttle improvement over the previous model. If you check the Wadia web site they have all models listed with dated of Mfg. and if service or updates are available for any model. none of my wadia's needed service when I took my current 581 to be updated to an I model the service was quick and professional. Buy with confidence.
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