how to make 2.1 class d amplifier 120watts make it home

how to make 2.1 class d amplifier I am using parts ne5532 2.1 preamplifier board, tpa3110 amplifier board, tpa 3118 btl mono amplifier board, LM2596 buck board, Bluetooth Usb panal Board, on off switch,rc female socket, speaker terminal, dc socket, wires cabinet size: width 7.5 inch height 2.5inch length 5.5inch how to make subwoofer amplifier :    • subwoofer amplifier it home 100watts subwo...