Monday, July 11, 2011

Subwoofer Driver Circuit for Stereo Car Audio System

Here the schematic diagram of subwoofer driver for stereo car audio system. You may use this circuit for your home audio system.
Subwoofer Driver Circuit for Stereo Car Audio System

Components Part:
R1,R4 = 1K
R2,R3,R5,R6 = 10K
R7,R8 = 100K
R9,R10,R13 = 47K
R11,R12 = 15K
R14,R15,R17 = 47K
R16 = 6K8
R18 = 1K5
P1 = 10K Log Pot
P2 = 22K Dual gang Linear Pot
D1 = LED
Q1,Q2 = BC547
C1,C2,C3,C6 = 4µ7/25V
C4,C5 = 68nF
C7 = 33nF
C8,C9 = 220µF/25V
C10 = 470nF
C11 = 100nF
C12 = 2200µF/25V
IC1 = TL072
IC2 = TDA1516BQ
SW1 = DPDT Switch
SW2 = SPST Switch (current handling min 3A)
SPKR = 4 Ohm Woofer or paralled two 8 Ohm Woofers

Circuit Notes:
  • The circuit connected to the output of existing amplifier. Take note that this circuit is not an amplifier, it just similar to crossover circuit.
  • Use heatsink to IC2 to keep the IC from overheating.

Page source of Subwoofer Driver Circuit for Stereo Car Audio System: redcircuits

About Audio Amplifier
An audio amplifier is an electronic amplifier that amplifies low-power audio signals (signals composed primarily of frequencies between 20 - 20 000 Hz, the human range of hearing) to a level suitable for driving loudspeakers and is the final stage in a typical audio playback chain.

The preceding stages in such a chain are low power audio amplifiers which perform tasks like pre-amplification, equalization, tone control, mixing/effects, or audio sources like record players, CD players, and cassette players. Most audio amplifiers require these low-level inputs to adhere to line levels.

While the input signal to an audio amplifier may measure only a few hundred microwatts, its output may be tens, hundreds, or thousands of watts. More explanation about power audio amplifier can be found at

This is a video tutorial about how to a very simple audio amplifier based on the LM386 amplifier chip. It can be built for less than $20 (or might be less than $8 in some countries) and used to amplify any low level audio signal including a guitar, bass or mp3 player.

Watch the video:

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