This is a one of a kind ZH270 that was modified by David Berning to directly drive electrostatics. It can also be used with 'regular' speakers. I am not the first owner; I think that I am the second, but can't be sure. The amp comes with some other mods, like Stillpoints feet. It also has some NOS tubes in it, I think Brimar. They look like the came from Andy at Vintage Tubes. I don't have the original box, but will pack well. I may consider driving to deliver to a buyer in central/eastern Pennsylvania or central/northern New Jersey.
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