Categories: AudioLinear Amplifier

2 x 30W Audio Amplifier with STK-465

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:

R1 = 1K
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.
[wpdm_file id=64]

circuit diagram

Recent Posts

Power Amplifier 45W Using uPC 1230 + Pre Amp Head uPC 1032

This is the circuit diagram of power amplifier 45W using power uPC 1230 as the…

55 years ago

Horn and Lamp Flasher Circuit for Car Reversing Gear Mode

The Horn Circuit This is a basic circuit of car horn and lamp flasher that…

55 years ago

Alarm Circuit for Drinking Water

This is the circuit diagram of drinking water alarm based a small water sensor by…

55 years ago

200W MOSFET Amplifier based IRFP250N

Here is the 200W MOSFET amplifier powered based on four piece of IRFP250N, they are…

55 years ago

300W RMS Stereo Power Amplifier based IC TDA7294

This is the 300W RMS stereo power amplifier circuit project. This amplifier is based four…

55 years ago

Stereo Tone Control with Line In + Microphone Mixer

This is an active stereo tone control circuit using very well known op-amp IC of…

55 years ago