This is one of two prototypes of this fantastic amp from Mapletree. I liken it to an updated and upgraded version of the MAD Ear+ HD. With new incoming gear, it is likely I'd be willing to let this guy go for the right price.
Very utilitarian design, with dual outputs – one for low and one for high impedance headphones. Also very friendly for two rolling – pair of 6DJ8s in the back and a 12AX7 in the front. This purchase will include brand new Electro-Harmonix tubes and a nice GE NOS JG-5751!
More info here: https://hollowstate.netfirms.com/