That amp is based on the TAS5615 chip. Not quite the same, but still a good performer.
Others have said that these amps sound their best with a tube preamp, and I tend to agree. I'm running a Schiit Saga, which is basically a stepped attenuator with a 6SN7 buffer (0db gain). Because the amp imparts no flavor of its own, it lets the preamp flavor, or lack thereof, shine through.
They're very simple, in function. The foundation is a 64-step stepped attenuator that is relay controlled. So when you change volume you can hear the relays clicking. The nerd in me likes it, the aesthetist in me does not (nerd wins). There are four single-ended inputs, again relay controlled. Two sets of outputs. The "option" is the switchable tube buffer. The unit takes a twin-triode 6SN7 or variant. The stock is a Russian 6H8C tube, which is somewhat dry. I'm running a Shuguang Treasure CV-181Z which is rich sounding, without being overly so.I'm intrigued by the Schiit Saga. Seems reasonably priced at <$400. Lots of inputs.
Please tell me more.