|Quantity||3+ units||10+ units||30+ units||50+ units||More|
|Price /Unit||$21.60||$21.16||$20.50||$19.62||Contact US|
- This is a support Bluetooth 5.0 audio receiver Updated, with a pre-amplifier, Bass crossover Processing. With bass, left and right channel volume adjustment, treble adjustment, the total volume potentiometer control 2.1 amplifier board.
- Use DC power supply: 12-24V Power Supply, Maximum support 50W (left channel) +50 W (right channel) +100 W (bass channel) three-channel output.
- Adopts TPA3116D2 high-performance digital amplifier chip as the core, a parallel bridge subwoofer output, do a left and right channel output.
- Wide operating voltage, power-saving design, efficiency up to 90%. You can use good performance switching power supply, laptop switching power supply, you can also use the charging bottle, or car power supply and so on.
- Board is a good test of the finished product board is welded, according to figure connected to a good speaker, audio input or connect the Bluetooth audio device and connected to the power can be used.
Volume potentiometer left turn is to adjust lower volume, turn right is to adjust HIGH volume. Press Down is the function switch
Function switch Instructions for use:
1. Plug in the power on default Bluetooth mode
2. Bluetooth Disconnected, long press switch can Change to audio Input Mode.
3. Bluetooth play status, short press the switch to pause / play
The main technical parameters:
101 (W) x 100 (D) x 25 (H) mm, excluding potentiometer and socket projection
Voltage range: DC 11-25V (Current 3-4A, or 19-24V / 4-5A, such as high power requirements 20-24V / 8-9A above)
Subwoofer frequency range :20Hz~200Hz
Bluetooth receiving distance:> 8 m (meters)
Audio input sensitivity: 600-800mV, frequency response range: 20Hz-20KHz,
Speaker impedance: left and right channel speakers: 4-8 ohm, Bass speaker impedance: 2-8 OHM,
1. Power amplifier board using a current sound, noise?
Our power amplifier, most of them are the use of DC power supply. The board itself does not produce current noise and noise,
The main reasons are:
A: with the power supply filter is not good, the current sound is the power or audio input is not normal
B: The quality of the input signal is poor, the output of the device connected to the input link is not normal, and the noise is caused by improper audio input
C: The quality of the input cable is poor, the cable is not properly connected, the cable is damaged, and the wiring is vacant
D: input connected to other playback devices, some devices share the power supply to cause noise
2.No sound, no sound in one channel？
A speaker is bad, speaker cable barrier
B, poor input cable connection, wiring damage, input connected to play the device output is not normal
3 .Volume open big breaking sound, broken sound?
A. Insufficient power supply, wiring to confirm the correct wiring, supply current is sufficient
B. Speaker itself poor performance or damage, speaker power is too small or too large
C. Left and right channel speaker (+) (-) output is independent. Can not connect to each other
4. Subwoofer amplifier volume open large speaker broken sound？
1. The lack of power, the line to confirm the correct wiring, power supply current is sufficient
2. The speaker's own power is too large or the audience, the speaker's bass performance is poor. The structure of the speaker box, this
These are not normal will cause broken sound
5. The volume of power is not enough？
Power and power supply voltage, the amplitude of the audio signal, the size of the speaker impedance has a relationship, any one will be less than shadow
6. Amplifier will burn it?
A: The positive and negative polarity of the power supply are reversed, the power supply voltage is too high, exceeding the working voltage of white paper
B: If the board requires the use of DC power supply is not directly connected to the AC adapter power supply (this need to add rectifier filter to
DC, it can be accessed)
C to confirm the wiring is correct, connected to the power supply, wiring errors, short circuits, will cause damage to the key parts!
Tips:Each batch of Material and Color will be different, But the Material parameters are the same. Random delivery,
- 1pcs TPA3116 2.1 Bluetooth Subwoofer Amplifier Board