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The Walfront ZK-TB21 is a high-power 2.1 channel Bluetooth digital amplifier board featuring Bluetooth 5.0 for wireless audio input, delivering up to 50W per stereo channel and 100W to the subwoofer. It incorporates a TPA3116D2 chip with AM interference suppression and a comprehensive protection mechanism against overvoltage, undervoltage, overheating, DC faults, and short circuits. Compact and durable, it supports 20-100W speakers (4-8ฮฉ) and operates on 12-24V DC power, making it ideal for professional-grade audio setups with reliable, clear sound.
| ASIN | B08GZBJWFZ |
| Best Sellers Rank | #2,078 in Electronics ( See Top 100 in Electronics ) #2 in Home Audio Amplifiers |
| Brand | Walfront |
| Brand Name | Walfront |
| Country Of Origin | China |
| Customer Reviews | 4.1 out of 5 stars 117 Reviews |
| Included Components | inc |
| Manufacturer | Walfront |
| Material Type | Material |
| Maximum Output Power | 100W |
| Maximum Supply Voltage | 24 Volts (DC) |
| Maximum supply voltage | 24 Volts (DC) |
| Minimum Supply Voltage | 12 Volts (DC) |
| Minimum supply voltage | 12 Volts (DC) |
| Model | TB21 |
| Mounting Type | Surface Mount |
| Mounting type | Surface Mount |
| Number of Channels | 2 |
| Output Power | 50 Watts |
| Package Type Name | Box" (meaning 'Box' in Spanish) |
| Part Number | TB21 |
| Specification Met | FCC |
| Supply Current | 5 Amps |
| Voltage | 24 Volts |
J**D
Best amplifier kit
I am happy ๐ these are the best items onbthis platform... really appreciate to the dealrs who are selling such nice products on Amazon. ๐๐ป
R**A
Low noise , no heat clear sounds .
I love this product . Only problem is mount in amplifier case .
M**A
Great product
Amazing thing
A**N
Powerful home theater with this awesome amplifier
One word ... Awesome!!!! The best class D amplifier ever. Go ahead connect your passive subwoofer and speaker and you are in for an amazing experience of an affordable home theater system!!!!!! Added bonus is satisfaction of putting it all together DIY way!
J**Z
Tiene muy buen sonido
Funciona muy bien, tiene potencia y excelente sonido, le conecte unas bocinas vintage de 8 ohms y un subwoofer con una fuente de 12v 3A, estรก funcionando perfecto.
N**N
Best bang for buck
Works really well for the price. Was hard to find a 2.1 amp with a powered sub connection since they all have LFE sub out and cost twice as much as this. Works perfectly, just need to keep the volume knob less than 50% otherwise I get lots of background static. But even at that level, its plenty loud, could be because I'm using 8ohm bookshelf speakers. I love the fact it has individual control for sub freq/vol and L/R treble/bass as well. All these features in an amp this cheap/small is impossible to find these days.
J**A
Fun and functional
Do it yourself assembly. Fun, and functional. Thanks!
S**R
"Not met my expectations"
Class D amplifier usually very good but this one doesn't felt that way may be some manufacturing issue or a faulty unit .
Trustpilot
2 days ago
2 months ago