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The ZK-ST21 TPA3221 Bluetooth Power Amplifier Board is a high-fidelity 2.1 channel audio module delivering up to 300W total output (100W×2 + 200W subwoofer). It supports a wide voltage range (12-30V) and multiple inputs including Bluetooth, AUX, and USB. Featuring independent treble and bass controls, it offers customizable sound tuning. Built-in protections ensure safe, reliable operation, backed by responsive 24/7 customer support.
| ASIN | B0CXX7TG5V |
| Best Sellers Rank | #39,563 in Electronics ( See Top 100 in Electronics ) #199 in Audio Component Amplifiers |
| Brand | DAJUNGUO |
| Brand Name | DAJUNGUO |
| Customer Reviews | 3.9 out of 5 stars 17 Reviews |
| Included Components | amplifier board |
| Item Dimensions | 4.76 x 3.93 x 0.98 inches |
| Item Weight | 290 g |
| Item dimensions L x W x H | 4.76 x 3.93 x 0.98 inches |
| Manufacturer | DAJUNGUO |
| Maximum Output Power | 300 watts |
| Maximum Supply Voltage | 30 volts_of_direct_current |
| Minimum Supply Voltage | 12 volts_of_direct_current |
| Model | ZK-ST21 |
| Mounting Type | Surface Mount |
| Number of Channels | 2 |
| Output Power | 200 watts |
| Part Number | ZK-HT21 |
| Supply Current | 10 A |
| UPC | 194852393783 |
A**Z
Excelente amplificador.
Excelente amplificador, buena calidad de sonido y potencia, recomendado.
A**N
Sounds Great
Easy to install sounds amazing. Connects easy without App,
R**N
Useless for 12V applications
The good: It was easy to put together and wire up and seems to be well designed. Bluetooth pairing worked straight away with my iPhone. The not-so-good: I knew this wouldn't get the full 100 watts/channel at 12v, but I figured that an amp designed for 100w would deliver at least 20w when running on a 12V supply. There was nothing in the listing providing power numbers at various voltages. I guess this was my mistake- the amp includes a slip of paper showing output at various input voltages and speaker impedances, and with a 12V supply and 8 ohm speaker it puts out a whopping 10watts. Which is pretty useless even for the tiny speakers I was hooking this up to.
C**R
Cuts off at high volume
I have a 24 V power supply.It cuts off at high volume
S**R
Amp won't turn on
The amp I got won't turn on when I turn the master volume up, no lights, no Bluetooth, nothing. I did get the right power supply 24v at 10a.
J**F
arrived DOA
Plugged it in, light went on, no sound, could not make it work. This is not my first time using these types of amps, I know generally what I am doing. Not sure if the capacitor is broken, speakers would not even pop and I was using a 24v power source. The instructions are pretty minimal and there is quite literally no tech support you can access. Don't waste your money.
A**S
LOUD AND CLEAR AND EASY TO USE!
Don’t hesitate, buy it, I have the 100+100+200 amp, it’s powered by a 12 volt battery, I ordered a wall plug in so I don’t have to deal with the hazards that come along with 12 v batteries in houses. Originally I had it going to a buck boost to boost the voltage to 26v going to the amp, but it started on fire, so I wired the amp straight to the battery and it sounds just as good on 12v as it did on what was supposedly 26v. So if you’re thinking about purchasing this, do it, my ears hurt because of how loud it is, I put it on full volume and it was CLEAR STILL!!! Sounds insane, granted I have 130$ Rockford fosgate speakers so they sound good either way, they are the t1 2 way 6.5s. Then for a sub I have a massive audio 600 watts max 300 rms. It all sounds perfect, even though the sub is underpowered, it hits just right, anymore volume and stuff would be falling off my shelves. Amazing product
J**O
buena calidad
se ve de buena calidad, se hicieron pruebas y fué satisfactorio el resultado
Trustpilot
2 months ago
3 weeks ago