Thanks for your reply.  I've only attempted to use this amp as a bedroom located listening station for my Sennheiser 600's and I'm amazed at how great it sounds.  It's good to hear that the model I have is the real deal, stenciled right nor not.  The big unknown factor aside from that was if the...

Today I received what was supposed to be a FiiO E9i from Amazon for use with Sennheiser HD-600's.   I'm old and not very bright, and am a bit confused by what I've received - that is - the receipt, and the barcode label on the box shows E9i.  However, the multi-language booklet and the box...