1. Classic appearance, increase the high-end experience of the rotary encoder, increase the mid-range adjustment, and fully cover the subwoofer, mid-range and treble sound effects
2. APP has a timer shutdown function
3. One-key on/off, no need to long press and wait to see the indicator light
4. input method: AUX+Bluetooth+U disk+USB sound card
5. Input anti-reverse connection, overheating, overcurrent, short circuit protection
[Product Name] 2.1 Channel Bluetooth Audio Power Amplifier Board Module
[Product Model]ZK-TB21S
[Amplifier chip] TPA3116D2
[Number of channels] 2.1 channels (left channel + right channel + subwoofer)
[Bluetooth version]5.1
[Switch mode]Mechanical switch (no need to wait for a long press)
[Power supply by adapter]DC12~24V , greater or equal to 8A
[Adapted speakers] Left and right channels 20-50W, 4-8 ohm subwoofer 20-100w, 3-8 ohm
[Output power] Left and right channels less than or equal to 50W, subwoofer less than or equal to 100w
[Protection mechanism] Input anti-reverse connection, overheating, overcurrent, short circuit protection
Tip: Only when the audio signal input is large enough and the power supply voltage/current is large enough, will there be enough output power!
The higher the power supply voltage, the greater the output power, the smaller the speaker impedance, the greater the output power! Please make sure that the power of the adapted power supply is greater than the actual working power of the power amplifier!
colour: black
Material: ABS
Size: 119x100x22mm
Package Contents:
1 x Amplifier Board
1 x Screwdriver
1 x Terminal
Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
Logistics information
Our products are located in Hong Kong, China, and the logistics speed depends on your specific location. According to our experience, it usually takes about 15-20 days of transportation time
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How to choose the correct size:
Step 1 Please measure your foot length carefully.
Step 2 Please choose the correct size according to your foot length and chinese size.
For example, If your foot length is 255 mm , you should choose the size 8.
