4713: Full hard suspension construction. Digital signal output terminal. coaxial:2. analog output:1. Direct connection of drive unit to chasis. with spike. 4705: 2 Progression substrate in chasis with gemini (D/A)/Progression. Digital input:1 coaxial. 32,44.1,48kHz. 4799: power supply, ※4705gemini:independent power . Therefore 3 power supply(4713).