Class ABC4* R3 20 kW Vp 1 mF C1 AUDIO INPUT C2 390 nF R2 20 kW INM INP Vp 300 kW + Vp OUTA 20 kW 8W 20 kW OUTB Vp C3 100 kW R1 1 mF BYPASS 300 kW SHUTDOWN + R4* SHUTDOWN CONTROL VM VM_P * R4, C4: Not Mounted ……