1) More thicker chassis ,Use HIFIDIY Aluminum top load chassis. The chassis was thicker version , Button load to 8MM , all aluminum machine feet . 2) Digital output use the re-clock design , Use high 1PPM Crystal 3) the New VAM1202 module of philipp 4) Remine the I2S port , can add the DAC insider for a CD player 5) high version transformer of the this kit is A type silicon iron transformer of Sunrise ( Use from 110V-240V) 6) The kit with a aluminum remote control. 7) Use the DALE resistor and nichicion Muse KZ capacitor , Wima high version capacitor 8) Provide one coaxial, one balance and one optical output.