The KSA-i400 utilizes the company's proprietary iBias system to remain in class-A without gobbling up excessive amounts of current. The amp promises 400Wpc into 8 ohms, doubling all the way down to 2 ohms. "It will actually double down to 1 ohm if you can find a way to pull enough power from the wall," Schofield said. 

Krell claims that its new XD technology lowers impedance and enhances the damping factor to better control loudspeaker drivers by enabling them to react 30–35% faster. Another technology, not yet named, claims to eliminate 2nd order harmonic distortion and match output devises "out several points" for more realistic soundstaging and presentation.

"Krell is moving back to huge power and industrial design," Schofield said. "This is a brand new design, completely rethought from what we have now. I've never heard an amplifier do what this amplifier does. David Goodman, our Chief Product Designer, has outdone himself."