Circuit Audio Amplifer with IC TDA 1521

See below this circuit:


Datasheet IC TDA 1521 :
Vcc                = 6-30 V
Pout               = 2X 6W
RL                 = 8 Ohm
Ft                   = 20-20 Khz
Icco               = 40 mA
Package         = SIP 1-9
Manufactered = Siemens