IC LM12 , 150 Watts high power amplifier

To supply the required voltage to the  amplifier circuit minimum of 7 Volt and a maximum of 24 volts . Incurred sizable ouput for amplifier ic 300 W maximum output.
high power amplifier schematic
Part List :
R1_____________________________________10K
R2_____________________________________10K
R3_____________________________________220K
R4_____________________________________2.2R 2W
C1_____________________________________1uF
C2_____________________________________1000uF
C3_____________________________________68pF
D1_____________________________________BY229
D2_____________________________________BY229
L1_____________________________________4MH
IC1____________________________________LM12