About the EMM Labs DAC

It seems that the EMM Labs DAC only can achieve optimal performance in conjunction with the proprietary Philips or Meitner transport. Does anyone know what might be the reason for this synergy? To me the Philips transport is just another mass production unit with quite an ordinary built quality. But where lies the secret? Is it due to another clock, D/A-converter chip or digital filter? If the Meitner modification is truly an improvement, why can it not be applied to other transports?

Dazzdax