Subwoofer Amplifier Circuit
Audio
Signal is first filtered to remove the high frequency signals and allow
only the low frequency signals to pass through it. This low frequency
signal is then amplified using a voltage amplifier. This low power
signal is then amplified using a transistor driven class AB power
amplifier.
Circuit Diagram of 100W Subwoofer Amplifier
|
Component
|
Value
|
|
R1
|
6K
|
|
R2
|
6K
|
|
R3
|
130K
|
|
R4
|
22K
|
|
R5
|
15K
|
|
R6
|
3.2K
|
|
R7
|
300 Ohms
|
|
R8
|
30 Ohms
|
|
R9, R10
|
3 K
|
|
C1, C2
|
0.1uF, electrolyte
|
|
C3,C5,C6
|
10uF, electrolyte
|
|
C4
|
1uF, electrolyte
|
|
Q1
|
2N222A
|
|
Q2
|
TIP41
|
|
Q3
|
TIP41
|
|
Q4
|
TIP147, PNP
|
|
D1, D2
|
1N4007
|
|
Dual Supply
|
+/-30V
|
