Here is the simple 2 x 30W audio amplifier with STK-465 power IC. Simple circuit with higher power output, this amplifier circuit is very easy to build. Just look at the PCB layout of this circuit.. 
. The active component required is just the main power amplifier chip STK-465.
Schematic diagram:
This is a stereo audio system application. A STK-465 amplifier capable to deliver 2 x 30W audio output at 8 ohm loudspeaker and 2 x 40W using 4 ohm loadspeaker.
Components list:
C1 = 1uF/35V
R2 = 3,3K
C2 = 470pF
R3 = 100
C3 = 100uF/60V
R4 = 330
C4 = 100uF/60V
R5 = 3,3K
C5 = 10uF/60V
R6 = 1K
C6 = 47uF/60V R7 = 0,33
C7 = 8,2pF
R8 = 33k
C8 = 0,1uF
R9 = 4,7
C9 = 1uF/35V
R10 = 1k
C10 = 470pF
R11 = 3,3k
C11 = 100uF/60V
R12 = 100
C12 = 100uF/60V R13 = 330
C13 = 10uF/60V
R14 = 3,3k
C14 = 47uF/60V
R15 = 1k
C15 = 8,2pF
R16 = 0,33
C16 = 0,1uF
R17 = 33k
R18 = 4,7
IC1 = STK465
LS1 = Speaker 40W 8 or 4 Ohm
PCB Layout:
Component placement:
This circuit uses dual polarity power supply to work. Maximum supply voltage is 41V while the recommended supply voltage is 28V.
Sample Scheme of Dual Polarity Power Supply:
Download STK-465 datasheet You will need the datasheet for project reference.
STK-457, 459, 460, 461, 463, 465 Datasheet 51.33 KB
Download Datasheet