---
product_id: 503674883
title: "540W Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 160W×2+220W, 15V-36V Audio Power Amplifier Module with Treble and Bass Control"
brand: "dajunguo"
price: "€ 0.38"
currency: EUR
in_stock: false
reviews_count: 5
url: https://www.desertcart.gr/products/503674883-540w-bluetooth-power-amplifier-board-with-subwoofer-2-1-channel
store_origin: GR
region: Greece
---

# 540W peak power output 2.1 channel stereo with subwoofer Independent treble & bass control 540W Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 160W×2+220W, 15V-36V Audio Power Amplifier Module with Treble and Bass Control

**Brand:** dajunguo
**Price:** € 0.38
**Availability:** ❌ Out of Stock

## Summary

> 🎵 Unleash pro-grade sound with power and precision — don’t just listen, experience it!

## Quick Answers

- **What is this?** 540W Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 160W×2+220W, 15V-36V Audio Power Amplifier Module with Treble and Bass Control by dajunguo
- **How much does it cost?** € 0.38 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/503674883-540w-bluetooth-power-amplifier-board-with-subwoofer-2-1-channel)

## Best For

- dajunguo enthusiasts

## Why This Product

- Trusted dajunguo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ready for Nonstop Use:** Compact, lightweight design with wide voltage input (12-38V) ensures reliable performance anytime, anywhere.
- • **Seamless Connectivity:** Supports Bluetooth, AUX, and USB inputs—connect effortlessly to phones, TVs, laptops, and more.
- • **Built-in Safety Shield:** Advanced protections against short-circuit, over-current, overheating, and reverse polarity keep your gear safe 24/7.
- • **Powerhouse Performance:** Delivers a massive 540W output (160W×2 + 220W) for immersive sound that fills any space.
- • **Tailored Audio Experience:** Fine-tune your sound with dedicated treble and bass knobs for rich, layered audio that stands out.

## Overview

The DAJUNGUO ZK-HT21 is a compact 540W Bluetooth 2.1 channel power amplifier board featuring the high-fidelity TPA3251 chip. It offers versatile connectivity options including Bluetooth, AUX, and USB, plus independent treble and bass controls for customized sound. Designed with multiple safety protections and a wide voltage range (12-38V), it ensures reliable, high-quality audio output for home or professional setups.

## Description

Model: ZK-MT21 Bluetooth power amplifier boardBluetooth version: 5.0 (15m unobstructed)Audio input: 3.5mm AUX + BluetoothChannel: 2.1Input sensitivity: 500mVAdapted power supply voltage: 12-24V/5A or more (24V is the highest voltage that the AMP can withstand, and it is recommended to use a DC power adapter within 20V.)Speaker: 20-100W, 4-8OhmOutput Power:Maximum 50W R&L channel;Maximum 100W @subwooferProtection mechanism: anti-reverse connection, overheating, overcurrent, short circuit protectionNote that this product does not include a power supply, you need to equip it with a DC power supply.It is recommended to use a DC power supply within 20V. If you use a battery pack to supply power, please make sure that the voltage after the battery is fully charged is lower than the rated voltage.What's in the box?1 * Bluetooth power amplifier board1 * DC jack1 * Shell (upper+lower)1 * Screwdriver

Review: An absolute beast if you support it with the right hardware... - This is probably the 10th "Class D" amplifier card I've bought on desertcart. Being a 3rd generation woodworker, I like to install them into hardwood cigar boxes and put them up For Sale when complete. I even installed one into one of those junky little "Bass Cannon" 15-watt-glorified-toilet-paper-tubes. It isn't junky anymore. IT CRANKS, just like the others. I find that each one is a new "puzzle" in and of itself. I've got a very nice cigar box and a 200 watt unit hooked to this laptop, driving 2 SONY SS-ZX66i BIG bookshelf speakers, and a BOSS 10" DVC subwoofer wired down to 2 ohms, and mounted passively in a downfiring Klipsch box. Some may scream "BLASPHEMY", but the Klipsch speaker was wrecked, and the amp plate was blackened... UPDATE: The two pictures above are the cigar box I mentioned, after removing the 200W board, and modifying the faceplate to fit the new 500W board... I designed the labels myself, printed them on my laser printer, cut them out with a sharp scissors (14 attempts to satisfy my OCD), and glued them in place... It was tough, as this board is bigger than the old one in every direction... I had to modify all my previous wiring to make it fit the back side... It was another GREAT puzzle... So... ...a few weeks ago, "540 Watts" jumped off the desertcart page and bit me. Could it be true?? I thought about it, did some homework, and finally bought one to try it out. Lemme tell all of you: "They" got it RIGHT when "they" designed this little beast of an amplifier, whoever "they" are. This thing is SOOPER LOUD!!! I'm talkin' BLOW THE ROOF OFF loud. And that was using a 24VDC 2A power brick. My 36V 9A MeanWell power supply is on the way. ------------------------- UPDATE: Getting the MeanWell 36VDC power supply from desertcart was like getting a shark to hold still while pulling it's teeth out... But it finally arrived... Lemme tell you about !! W-O-W !! What a ride!! I think I broke a different kind of sound barrier than planes. This amplifier is insanely LOUD, and clear sounding, when you get it dialed in to your taste. I listen to Hard Rock/Metal, and this thing will melt your eardrums. I can't pinpoint what 500 watts actually sounds like, But, it's gotta be close. It's infinitely louder than all the other 200 watt boards I've bought in the past. ------------------------- When I opened the box, it was very well packed in plastic bags and bubble wrap. You have to mount the top and bottom panels onto the amp card, using stand-offs. That's all the assembly there is. I hot-glued the 2 capacitors down, 'cuz they were, well, just not glued down. And I removed the fan/heatsink and repasted the 2 main chips with Arctic MX-4 thermal compound, instead of Chinese toothpaste. It's rather clear sounding, but not the best I've ever heard. But there's ALOT of variables that define "clear" sound. It's not all about the amp itself. The speakers, the subwoofer, the wiring, and the room shape & furniture all play a role in that definition. Hook up junky speakers to it, and you'll get a junky sound. Drive it with 2 amperes, and it'll be cutting out every time you hit the volume or bass. Just like anything else, what you put into it will determine what you get out of it. This new amp may very well replace my first 200 watt amp, described above. UPDATE: IT HAS... 160 watts X 2 (L & R) + 220 watts (Subwoofer) = 540 watts. Now, I know those are PEAK numbers, not RMS. But I'll bet this amp will do every bit of 350 watts solid with the right hardware hooked to it. I found a PEAK->RMS formula that said "...multiply the PEAK wattage by 0.707 to get an approximate RMS wattage..." I don't know how accurate the formula is, but I came up with 380 watts. It's hooked to a pair of large SONY 4 ohm bookshelf speakers, and a BOSS 10" DVC 4 ohm subwoofer, wired down to 2 ohms or less. I can work with the 380 watt estimate. It is SO loud, my dogs got up and walked out of the room. My subwoofer "dances" across the floor. My neighbor called me asking if they opened the Club downstairs early. A friend asked me what I was gonna use it for. I said, "1) disturbing the peace, 2) rattling my windows, 3) melting my eardrums, and 4) taking over the world... MUAHUAHAHAHAHA". For those of you who like it LOUD, and already have or will buy a MEANWELL 36VDC power supply, GET YOU ONE OF THESE BAD BOYS, and CRANK IT UP. For mobile use, a DeWalt 20VMAX 3Ah or 5Ah battery works GREAT, although you won't get the 500 watts out of it. You should definetly use a multi-meter to test the voltage proposed. Anything over 36 volts may cause problems, up to and including failure. BUY ONE, YOU WON'T REGRET IT, UNLESS YOU CAUSE YOURSELF PERMANENT DEAFNESS... AND YET, ANOTHER UPDATE, 1 YEAR LATER: Well, it took me a year, but I did it now... I can only make a presumption about the cause, but I've BLOWN IT OUT... I blew out the subwoofer chip - see the 3rd pic above... Oh well, snot happens... EZ-COME-EZ-GO [Tesla]... My presumption is that having a big 10" dual voice coil subwoofer wired down to 2 ohms (or less) is the most-likely culprit... So, I'm gonna buy another one... And if it lasts me a year, it'll be all good... I'm not really bothered by it, because it has rattled my eardrums and my windows very nicely for the last year, and I know another one will do the same... No harm, No foul... Good Day!!!
Review: Bulit pruf. - Great product. Use it 10 hrs every day at work.

## Features

- 【TPA3251 HIFI CHIP】The TPA3251 Chip Solution: Stereo 2.1channel Output to Ensure Continuous Serial High-power Operation, Wide Voltage Input DC: 12-38V,This power amplifier board uses two TPA3251 high-fidelity maximum output power up to 220W*2+350W.
- 【MULTIPLE INPUT METHOD】The S350HS has multiple input methods such as Bluetooth input, AUX input, and USB drive input. The vast majority of devices can be used, such as mobile phones, televisions, laptops, etc., making it easy to connect and use.
- 【TREBLE & BASS CONTROL】If you are tired of an amplifier with only one volume knob, then you feel right, because you have further requirements for audio. By adjusting the high and low frequency knobs of the S350HS power amplifier board, you can make the sound more layered and make the bass more shocking.
- 【PROTECTION FUNCTION】S350HS Bluetooth power amplifier board has multiple protection mechanisms to ensure its safe operation. It has short-circuit protection, over-current, over-heat, and anti-reverse protection. When an overload occurs, the device reports the fault condition to the processor to protect itself from damage
- 【7 * 24 Hours After-sales Service】 Paying Attention To Customer Experience And Satisfying Customers Is Our Service Tenet. If You Have Any Questions About The Product, or The Product Has Quality Problems, Please Contact Us At Any Time, We Will Give You A 100% Satisfactory Answer

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09K4WDHLK |
| Brand | DAJUNGUO |
| Customer Reviews | 4.2 out of 5 stars 280 Reviews |
| Included Components | amplifier board |
| Item Dimensions | 15 x 13.1 x 2.6 centimetres |
| Item Weight | 327 Grams |
| Item dimensions L x W x H | 15 x 13.1 x 2.6 centimetres |
| Manufacturer | DAJUNGUO |
| Manufacturer Part Number | ZK-HT21 |
| Maximum Supply Voltage | 24 Volts |
| Maximum supply voltage | 24 Volts |
| Minimum Supply Voltage | 15 Volts (DC) |
| Minimum supply voltage | 15 Volts (DC) |
| Model Number | ZK-HT21 |
| Mounting Type | Surface Mount |
| Mounting type | Surface Mount |
| Number of Channels | 2 |
| Output Power | 540 Watts |
| Package Type Name | Package |
| Specification Met | TUV |
| UPC | 194852390676 |
| Voltage | 36 Volts (DC) |

## Product Details

- **Item dimensions L x W x H:** 15 x 13.1 x 2.6 centimetres
- **Voltage:** 36 Volts (DC)
- **Manufacturer:** DAJUNGUO
- **Maximum supply voltage:** 24 Volts
- **Minimum supply voltage:** 15 Volts (DC)

## Images

![540W Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 160W×2+220W, 15V-36V Audio Power Amplifier Module with Treble and Bass Control - Image 1](https://m.media-amazon.com/images/I/71m+EM+dT8L.jpg)
![540W Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 160W×2+220W, 15V-36V Audio Power Amplifier Module with Treble and Bass Control - Image 2](https://m.media-amazon.com/images/I/81eCQ-snpWL.jpg)
![540W Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 160W×2+220W, 15V-36V Audio Power Amplifier Module with Treble and Bass Control - Image 3](https://m.media-amazon.com/images/I/81KOPNOUWgL.jpg)
![540W Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 160W×2+220W, 15V-36V Audio Power Amplifier Module with Treble and Bass Control - Image 4](https://m.media-amazon.com/images/I/81pfLtLBTPL.jpg)
![540W Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 160W×2+220W, 15V-36V Audio Power Amplifier Module with Treble and Bass Control - Image 5](https://m.media-amazon.com/images/I/71PSPSB4GHL.jpg)

## Questions & Answers

**Q: Is the subwoofer frequency knob an adjustable low-pass filter?**
A: Yes frequency and gain aka volume separate from volume for everything..aswel as a slider volume so you can set the max anyone can turn the volume up..so they don't blow ..

**Q: If I was hook this up in my vehicle with about 13.6vdc-14.1vdc and 50-60amps then will it work or blow? If it’ll work then how many watts/channel???**
A: I had the slightly weaker version setup in my vehicle. I wired the front speakers to the two speaker channels, and ended up wiring my rear 6x9s in series and wired those to the subwoofer channel. You must be careful with impedances if you do this to make sure you don't blow your speakers. But doing this gave me very good sound for not having an actual subwoofer. A dedicated, high power amplifier will have way more bump for an actual subwoofer, however, if you're ok with the idea of using your rear fill as a stand-in subwoofer, wire it up how I described and it'll sound pretty good. I also used a DC-DC buck converter to step my vehicle's 12-14V DC up to the optimal power level for the amplifier. They're all over amazon just search the input power by the output power and the amp rating and you'll be good to go.

**Q: Fuente recomendable para este equipo?**
A: ¿Quieres decir qué tipo de energía necesita?
La fuente de alimentación de 12V-36V / (5-15A) DC puede impulsarlo. Si desea obtener una entrada de alta potencia, primero debe aumentar el voltaje de entrada o reducir la impedancia del altavoz.

**Q: To run a 4ohm sub and 4 ohm speakers what ah should I get for the 36v power supply?**
A: This need depends on your needs, if your speaker power is relatively large, then it is recommended to use 36V. If the power of the speaker is not very large, the 24V DC power supply can also drive your speaker.

## Customer Reviews

### ⭐⭐⭐⭐⭐ An absolute beast if you support it with the right hardware...
*by C***. on 28 July 2022*

This is probably the 10th "Class D" amplifier card I've bought on Amazon. Being a 3rd generation woodworker, I like to install them into hardwood cigar boxes and put them up For Sale when complete. I even installed one into one of those junky little "Bass Cannon" 15-watt-glorified-toilet-paper-tubes. It isn't junky anymore. IT CRANKS, just like the others. I find that each one is a new "puzzle" in and of itself. I've got a very nice cigar box and a 200 watt unit hooked to this laptop, driving 2 SONY SS-ZX66i BIG bookshelf speakers, and a BOSS 10" DVC subwoofer wired down to 2 ohms, and mounted passively in a downfiring Klipsch box. Some may scream "BLASPHEMY", but the Klipsch speaker was wrecked, and the amp plate was blackened... UPDATE: The two pictures above are the cigar box I mentioned, after removing the 200W board, and modifying the faceplate to fit the new 500W board... I designed the labels myself, printed them on my laser printer, cut them out with a sharp scissors (14 attempts to satisfy my OCD), and glued them in place... It was tough, as this board is bigger than the old one in every direction... I had to modify all my previous wiring to make it fit the back side... It was another GREAT puzzle... So... ...a few weeks ago, "540 Watts" jumped off the Amazon page and bit me. Could it be true?? I thought about it, did some homework, and finally bought one to try it out. Lemme tell all of you: "They" got it RIGHT when "they" designed this little beast of an amplifier, whoever "they" are. This thing is SOOPER LOUD!!! I'm talkin' BLOW THE ROOF OFF loud. And that was using a 24VDC 2A power brick. My 36V 9A MeanWell power supply is on the way. ------------------------- UPDATE: Getting the MeanWell 36VDC power supply from Amazon was like getting a shark to hold still while pulling it's teeth out... But it finally arrived... Lemme tell you about !! W-O-W !! What a ride!! I think I broke a different kind of sound barrier than planes. This amplifier is insanely LOUD, and clear sounding, when you get it dialed in to your taste. I listen to Hard Rock/Metal, and this thing will melt your eardrums. I can't pinpoint what 500 watts actually sounds like, But, it's gotta be close. It's infinitely louder than all the other 200 watt boards I've bought in the past. ------------------------- When I opened the box, it was very well packed in plastic bags and bubble wrap. You have to mount the top and bottom panels onto the amp card, using stand-offs. That's all the assembly there is. I hot-glued the 2 capacitors down, 'cuz they were, well, just not glued down. And I removed the fan/heatsink and repasted the 2 main chips with Arctic MX-4 thermal compound, instead of Chinese toothpaste. It's rather clear sounding, but not the best I've ever heard. But there's ALOT of variables that define "clear" sound. It's not all about the amp itself. The speakers, the subwoofer, the wiring, and the room shape & furniture all play a role in that definition. Hook up junky speakers to it, and you'll get a junky sound. Drive it with 2 amperes, and it'll be cutting out every time you hit the volume or bass. Just like anything else, what you put into it will determine what you get out of it. This new amp may very well replace my first 200 watt amp, described above. UPDATE: IT HAS... 160 watts X 2 (L & R) + 220 watts (Subwoofer) = 540 watts. Now, I know those are PEAK numbers, not RMS. But I'll bet this amp will do every bit of 350 watts solid with the right hardware hooked to it. I found a PEAK->RMS formula that said "...multiply the PEAK wattage by 0.707 to get an approximate RMS wattage..." I don't know how accurate the formula is, but I came up with 380 watts. It's hooked to a pair of large SONY 4 ohm bookshelf speakers, and a BOSS 10" DVC 4 ohm subwoofer, wired down to 2 ohms or less. I can work with the 380 watt estimate. It is SO loud, my dogs got up and walked out of the room. My subwoofer "dances" across the floor. My neighbor called me asking if they opened the Club downstairs early. A friend asked me what I was gonna use it for. I said, "1) disturbing the peace, 2) rattling my windows, 3) melting my eardrums, and 4) taking over the world... MUAHUAHAHAHAHA". For those of you who like it LOUD, and already have or will buy a MEANWELL 36VDC power supply, GET YOU ONE OF THESE BAD BOYS, and CRANK IT UP. For mobile use, a DeWalt 20VMAX 3Ah or 5Ah battery works GREAT, although you won't get the 500 watts out of it. You should definetly use a multi-meter to test the voltage proposed. Anything over 36 volts may cause problems, up to and including failure. BUY ONE, YOU WON'T REGRET IT, UNLESS YOU CAUSE YOURSELF PERMANENT DEAFNESS... AND YET, ANOTHER UPDATE, 1 YEAR LATER: Well, it took me a year, but I did it now... I can only make a presumption about the cause, but I've BLOWN IT OUT... I blew out the subwoofer chip - see the 3rd pic above... Oh well, snot happens... EZ-COME-EZ-GO [Tesla]... My presumption is that having a big 10" dual voice coil subwoofer wired down to 2 ohms (or less) is the most-likely culprit... So, I'm gonna buy another one... And if it lasts me a year, it'll be all good... I'm not really bothered by it, because it has rattled my eardrums and my windows very nicely for the last year, and I know another one will do the same... No harm, No foul... Good Day!!!

### ⭐⭐⭐⭐⭐ Bulit pruf.
*by H***H on 12 December 2025*

Great product. Use it 10 hrs every day at work.

### ⭐⭐⭐⭐ Was pretty impressive.
*by A***Z on 26 December 2022*

Well I wired it up after I upgraded the subwoofer to a 8" recoil echo subwoofer and a 36v switching power supply in my boombox along with this amp. It has dynalab 8" woofers, soundstream 1" silk dome tweeters. I previously had another brand 24v version using the same 2.1 amplifier chip with 24v power supply and a 8" goldwood subwoofer, it all worked decent but amp seemed slightly underpowered especially on the sub channel and that goldwood sub was kinda weak and the amps Bluetooth was super glitchy. The new sub, amp and power supply transformed it into a cranking unit with killer bass all 3 drivers were flexing big-time very impressive while sounding clean. Only issue is I didn't notice I ordered a dual 4 subwoofer until I received it so I rolled the dice and wired it to 2 ohms in hopes for bit more output even tho the amp listed only 4 and 8 I just hoped it would be 2 ohms stable. Well I'm guessing it is not... After about 20 min of a test run of impressive output it instantly volume dropped and had badly distorted output and sub channel died, sooooo I'd say something in the amp popped. Woops I wish I had just wired it to 8 (seems 4 ohm final impedance is not possible with a dual 4 coil unless only use one side of the coil) but I ordered a 2nd hopefully that will fix the problem seems the power supply still shows 36v so its likely fine. I can say I really liked how much better the function/volume switch works than previous amps volume knob that pushed in for function. I was pleased how fast The Bluetooth linked. I'm pretty sure the 36v wattage ratings are very optimistic but I haven't clamped it so I don't actually know for sure but over inflated wattage ratings is very common with budget Chinese amps these days but even so it seemed fairly powerful and pushed 3 8" drivers no problem.so it's a good unit as far as I can see but I guess don't wire it below 4 ohms or it will likely pop and end up a paper weight. The problem likely being knowingly running a 2 ohm sub on a 4 ohm stable amp is why I didn't try to return it it's not the amps fault. Now the new unit will be the test if it holds up on a 8ohm sub I'll give it a good review but it it pops too I will definitely ask for my money back on the 2nd unit.

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-06-03*