I bought this subwoofer amplifier board from AliExpress for only KES1318 which is around 10 USD. The controls at the front are the volume and frequency control. The power supply voltage can be anything from 12 to 24 Volts. In the video below Im using a 19 Volt laptop power adapter.
This small amplifier board can drive even big subwoofers like my pioneer 12 inch/30cm subwoofer. It’s powerful for movies and music at moderate volumes but don’t expect that chest thumping bass from this tiny amplifier.
Watch the following videos to learn more of my experiences.
TPA31162D Amplifiers boards; Full range and subwoofer boards review
Here is the full description from the AliExpress page
- This is a bass power amplifier board with preamplifier, bass crossover, and bass volume potentiometer control. It is for the pros who already have 2.0 amplifiers, and the DIY combination is used for 2.1 amplifiers.
- It is based on Texas Instruments’s TPA3116D2 high performance digital power amplifier chip.
- DC power supply 12-24V power supply, wide working voltage, power-saving design, efficiency up to 90%. Supports up to 100W (Bass) bass channel output.
- You can use a good performance switching power adapter, notebook switching power supply, or rectified and filtered transformer power supply, you can also use a rechargeable source, or car power supply, etc…
- Boot anti-shock protection design, there is no POP popping at boot, please pay attention to the high requirements.
- The board is a finished board that has been soldered and tested. Connect the speaker according to the picture and input it with audio input and power.
Technical Parameters
Board Size: 55 X 83 X 29mm (excluding the protrusion of the potentiometer 15mm)
Operating voltage range: DC12-24V (current 2-3A or more, if the power is larger, it is recommended to be 19-24V 4A or more)
Frequency response range: Input: 20Hz-20KHz
Output: 20Hz-180Hz
Audio input sensitivity: 500mV
Subwoofer impedance: 2-8 ohm
- Note: 1. Output power and power supply voltage, speaker impedance, and audio source input size. Usually, the power supply voltage is higher, and the supported output power will be larger.
- Speakers with different impedances can support different output powers. Usually, the power of the speakers is smaller and easier to achieve.
Wiring method (important)
- Instructions for checking the web page before use
- Connect the speaker cable.
- Connect the audio input cable.
- Confirm the wiring is correct, and
- Finally plug in the power!
To change the wiring or move the board, you must remove the power before operating. Incorrect use, short circuit between solder joints, or short-circuit between parts can cause chip damage.
Precautions for use (important)
About power supply selection:
- The board is powered by DC power supply, with positive and negative reverse connection protection, positive and negative connection and no power.
- The power supply is not allowed to be connected to the speaker output interface incorrectly, which will cause damage to the power amplifier chip.
- The maximum working voltage is 25V (Note: Do not use more than 25V when using).
- The board is powered by DC power supply. Please use a good DC power supply. If the power supply performance is poor, there may be hum, or current sound… Especially for switching power supply, please try to use the grounding pin 3, similar to a laptop 3-pin AC plug. Note: Household AC power strips must be grounded. If they are not grounded, some switching power supplies may have current sounds.
- If you use ordinary AC transformer power supply, you must add rectification and filtering before you can connect and use. (Note: The no-load voltage after rectification should not be greater than 25V).