Matrix M-Stage headphone amp. I bought this directly from the online Matrix dealer "coolfungadget" last January. This amp got a good bit of use from January through April, about an hour a day roughly, plus some burn in time in January. Its in very good condition, taken care of and just used in the house. The op amp inside this M Stage is the BB 0627 with the single to dual adapter from Brown Dog.Comes in original box w/ power cable. I also have some Burr Brown class A op amps I made for the M stage that I can add on if you are interested. I prefer paypal, but I will take personal checks or money orders, its just a slow process for you the buyer. If you use paypal, please send money via the gift option so there are no paypal fees. I am new to this website, so I have no feedback or rating. I have a 100% positive feedback score on ebay if you want to check that out before buying, the username is: pathofworms thanks -jason
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