latest new 2W Mini Amplifier circuit

he following circuit is inexpensive, easy and very simple. Generally, this audio amplifier that can be used for computer, CD player or other devices that have a headphone output.

Schematic Diagram:

Component part list:
P1 = 10K Log.Potentiometer
R1, R2 = 33K
R3 = 33R
R4 = 15K
R5,R6 = 1K
R7 = 680R
R8 = 120R
R9 = 100R Trimmer Cermet

C1,C2 = 10uF/63V
C3 = 100uF/25V
C4,C7 = 470uF/25V
C5 = 47pF
C6 = 220nF
C8 = 1000uF/25V

D1 = 1N4148

Q1 = BC560C
Q2 = BC337
Q3 =TIP31A
Q4 = TIP32A

SW1 = SPST switch

SPKR 3-5 Watt Loudspeaker, 8, 4 or 2 Ohm impedance

Technical data:

• Output power: 1.5 Watt RMS @ 8 Ohm, 2.5 Watt @ 4 Ohm, 3.5 Watt @ 2 Ohm (1KHz sinewave)
• Sensitivity: 100mV input for 1.5W output @ 8 Ohm
• Frequency response: 30Hz to 20KHz -1dB
• Total harmonic distortion @ 1KHz & 10KHz: Below 0.2% @ 8 Ohm 1W, below 0.3% @ 4 Ohm 2W, below 0.5% @ 2 Ohm 2W.

Source: 2 Watt Mini Audio Amplifier