Input sensitivity Pre-In: 0.6 ÷ 6 VRMS
Input sensitivity Speaker-In: 2.2 ÷ 22 VRMS
7.1 SPEAKER IN: AF M1D + HEAD UNIT SPEAKER OUT
7.2 PRE IN: AF M1D + HEAD UNIT PRE OUT
7.3 PRE IN: AF M4D + AF M1D + DSP PRE OUT
7.4 PRE IN: AF bit DSP PRE OUT + AF M1D