---
product_id: 454372978
title: "Bluetooth Power Amplifier Board Stereo - HiFi 2.1 Channel 2X220W+350W Bluetooth 5.1 16-32V Digital Power Audio Amplifier Module Subwoofer Control with AUX/Bluetooth/USB Flash Drive (ZK-AS21)"
brand: "makerhawk"
price: "410.36 DT"
currency: TND
in_stock: true
reviews_count: 11
category: "Maker Hawk"
url: https://www.desertcart.tn/products/454372978-bluetooth-power-amplifier-board-stereo-hifi-2-1-channel-2x220w
store_origin: TN
region: Tunisia
---

# Bluetooth 5.1 with 15m range 2x220W + 350W output power Multi-layer safety protection Bluetooth Power Amplifier Board Stereo - HiFi 2.1 Channel 2X220W+350W Bluetooth 5.1 16-32V Digital Power Audio Amplifier Module Subwoofer Control with AUX/Bluetooth/USB Flash Drive (ZK-AS21)

**Brand:** makerhawk
**Price:** 410.36 DT
**Availability:** ✅ In Stock

## Summary

> 🎶 Unleash epic soundwaves—because your playlist deserves a power boost!

## Quick Answers

- **What is this?** Bluetooth Power Amplifier Board Stereo - HiFi 2.1 Channel 2X220W+350W Bluetooth 5.1 16-32V Digital Power Audio Amplifier Module Subwoofer Control with AUX/Bluetooth/USB Flash Drive (ZK-AS21) by makerhawk
- **How much does it cost?** 410.36 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/454372978-bluetooth-power-amplifier-board-stereo-hifi-2-1-channel-2x220w)

## Best For

- makerhawk enthusiasts

## Why This Product

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

## Key Features

- • **Versatile Input Modes:** Seamlessly switch between AUX, USB flash drive, Bluetooth, and USB sound card for ultimate connectivity.
- • **Built to Last & Protect:** Advanced short circuit, overcurrent, overheating, and anti-static safeguards keep your investment safe and sound.
- • **Powerhouse Audio Output:** Experience thunderous 2.1 channel sound with 790W peak power that commands any space.
- • **Next-Gen Wireless Freedom:** Bluetooth 5.1 ensures ultra-stable, low-latency streaming up to 15 meters—ditch the wires, not the vibe.
- • **Pro-Grade Sound Engineering:** Equipped with dual Texas Instruments TPA3251D2 chips delivering crystal-clear, distortion-free HiFi audio.

## Overview

The MakerHawk ZK-AS21 Bluetooth Power Amplifier Board is a compact yet mighty 2.1 channel amplifier delivering up to 790W peak power. Featuring Bluetooth 5.1 for stable wireless streaming, multiple input options including AUX and USB, and dual TI TPA3251D2 chips for high-fidelity sound, it’s engineered for audiophiles craving robust, distortion-free audio. Its comprehensive safety protections and app-enabled controls make it a reliable centerpiece for any modern sound setup.

## Description

Buy Bluetooth Power Amplifier Board Stereo - HiFi 2.1 Channel 2X220W+350W Bluetooth 5.1 16-32V Digital Power Audio Amplifier Module Subwoofer Control with AUX/Bluetooth/USB Flash Drive (ZK-AS21): Amplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Nice little amp. - Bought this amp to run my open but roofed outdoor ‘cook porch’ sound system. Was using a smaller amp from the same manufacturer; Wuzhi Audio, (MT21), for a year or so, which is good for 50 watts a side into the main speakers, and 100 watts into the subwoofer. (Do an desertcart search on Wuzhi MT21, I tried to do a link, but it came out as crazy long jibberish!) That one worked well, and when I saw this higher powered version, decided to go for it. Both are fed by high current power supplies with plug in speaker pigtails so I can A/B swap them easily. The original reason for the quick disconnect wiring was so the amp and power supply could be removed and stored indoors when not being used, and it made sense wiring the newer one as a ‘drop in’ replacement. As a result, it gave me the ability to do a quick comparison between the two amps. The larger amp has additional inputs in addition to the higher power rating, and the power input has a hard wire terminal strip instead of only the somewhat flimsy small power socket that is supplied with the smaller amp. This would be my only complaint about the smaller amp. Overall the larger amp is a much more robust build, both in power and chassis/component build. As mentioned earlier, the small amp worked well, with clean power delivery throughout its volume range. It is designed to simply not go any louder when turned up beyond its limits, and never clips or distorts. The larger amp shares this functionality and performs extremely well. They both feature the power switch as part of the volume control, which helps prevent turn-on into a volume level left high from a previous listening session. It’s an appreciated design! Have only used them on Bluetooth, which works very well. They connect quickly, are stable, and have decent range. Have used them with an iPhone, iPad, and android tablets with no issues. Have yet to try the USB or AUX input on the higher powered amp. The crossover is smooth and linear, and the separate subwoofer volume control allows balancing the subwoofer level to the main speakers. The bass and treble controls have good range, but I find leaving them at their midpoint works well. At least the ability is there if you need some tweaking to fit your listening environment. For reference, my musical taste is new/old country, classic rock and R & B. I enjoy some volume, but do not punish my speakers or my ears! In my application, the main speakers are 8 ohm, and the subwoofer is 4 ohm, so the amp output is lower than its advertised capability, (specified at 2 ohms), but is everything I need. The output power is roughly double that of the smaller amp, and is most discernible where it drives the subwoofer. As the higher powered amp has an on board cooling fan for the output components, it’s chassis runs cooler than the smaller amp at the same listening levels. Likely also a function of more headroom at the running power output. Kinda toying with the idea of adding a ‘shaker’ module to the porch floor frame to add some ‘butt shaking’ to the audio experience . If that happens, will add my observations to the review. 😏 This review inadvertently turned into one for both the small and larger amps, as the smaller one is my point of reference for these little amps. Being an old audio engineer, I am really impressed what can be done with such a small package. Both are extremely good for their price points, with more power and features available for the larger one. Of note: In order to get the full performance out of the amps, you need appropriate power supplies. “Wall warts” are NOT valid here! The manufacturer does state this in their published specifications . Today’s switcher power supplies are reasonably priced, and have robust clean output power. For the smaller amp, I use a 24vdc @ 15amps, (360 watts) supply. (https://www.desertcart.com/dp/B06XK2ZNKC?psc=1&ref=ppx_yo2ov_dt_b_product_details) The larger amp is powered by a 36vdc @ 27.2 amps, (1000 watts) supply. (https://www.desertcart.com/dp/B0C5DPSFZG?psc=1&ref=ppx_yo2ov_dt_b_product_details) While the price of the amps is good, consideration must be given to the add on cost of the necessary power supply. As a side note; during a multi day hurricane induced power outage, ran the smaller amp off of a Ryobi 18v 6AH battery, and it sounded great. As this amp is no longer being used on my ‘cook porch’, thinking of doing a project build of a portable Bluetooth ‘boom box’. Yeah, there are lots of commercial ones out there, but a 2.1 version with superior power and speaker size, using a swappable battery would be a fun thing to do, for me anyway! Such is the life of an old retired engineer……..
Review: Great product if you like loud music - I bought this and used it for a day and had to return it because it died. Did are turn and bought it again and have been rocking out with it since,been about a month and I love it. I have it powering a pair of jvc bookshelf speakers. The speakers are rated at 3 ohms probably 200 watt capable easy. I have a 8" sub offer on the unit rated 3 ohms 600 watt capable. These speakers were purchaced at a yard sale but are of godd quality for sure. I connected the to the unit and was very impressed with the sound,the sub hits hard and loud,I get the drums and bass that just blows me away,the bookshelf jvc speakers also are a very good fit and just rock out way better then I could have imagined. The controls are easy to figure out also,bass and treble are adjustable for the bookshelf speakers to suit me needs and adjustment for my sub is aslo impressive. This is a great product for the size of it and I'd also say I haven't used the other features this thing has to offer but I'm sure it all will be good I gave it 5 stars for the sound and it's quality build. Overall great product. I'd buy it again if this ever fails because if you are like me,I love my music loud! Quality sound for it being the size that it is, I'm impressed. My only con is trying to find a proper power cable for the amp itself,if anyone can guide me to one that would be great. As for now I'm using Alitov 110 volt power output 36 volt 4 amp 144 watt power adapter. So far it works good but not for sure if it the correct power source for this. Had trouble finding this power supply online but it's been working so far. I'd like to find something better and if someone can point me to it that would be great. Great product though,I love this thing and would definitely but it again if it ever craps out on me.

## Features

- 【HI-FI & Stereo】High quality 2.1 channel 220W+220W+350W Bluetooth 5.1 power amplifier board. With AUX, Bluetooth, U disk, USB sound card a variety of audio input methods. With two output modes of active and passive speakers, you can enjoy the music you want anytime, anywhere
- [New upgrade] The Bluetooth 5.1 power amplifier board supports APP control, and you can modify the Bluetooth name and password settings. The 5.1 Bluetooth version has settings such as adjustable sound volume, turn on/off sound, and timed shutdown. Comes with 10 natural sleep songs, up to 1023 sound combinations. Not only can you display the playlist of the USB flash drive, but you can also shake the phone to change songs or use the dial/mode button to switch songs
- 【TPA3251D2 power amplifier chip】The power amplifier board uses 2 TPA3251D2 chips from Texas Instruments. It is a high-performance class D power amplifier, which has class D efficiency and can bring true high-end sound quality. The device features an advanced integrated feedback design and proprietary high-speed gate driver error correction. This technology enables the device to maintain ultra-low distortion across the entire audio frequency band while delivering high-definition sound quality
- 【Super Compatibility】5.1 Bluetooth version, higher transmission efficiency, more stable, and longer transmission distance. In open spaces, the wireless range is up to 15 meters (49 feet). Can be widely used in various devices such as tablet computers, PCs, TVs, smartphones, notebook computers, etc
- 【Safety Protection】The amplifier board has short circuit, overcurrent, overheating and anti-static protection to prevent complete failure. When overloaded, the device reports a fault condition to the processor to protect itself from damage

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B3D4786D |
| Best Sellers Rank | #183,351 in Electronics ( See Top 100 in Electronics ) #1,115 in Audio Component Amplifiers |
| Brand | MakerHawk |
| Date First Available | June 7, 2022 |
| Item Weight | 14.4 ounces |
| Item model number | ZK-AS21 |
| Manufacturer | MakerHawk |
| Maximum Supply Voltage | 32 Volts |
| Minimum Supply Voltage | 12 Volts (DC) |
| Mounting Type | Surface Mount |
| Number of Channels | 3 |
| Output Power | 790 Watts |
| Package Dimensions | 6.42 x 5.47 x 2.01 inches |
| Package Type Name | box |
| Specification Met | FCC |
| Supply Current | 10 Amps |
| Voltage | 32 Volts |

## Product Details

- **Manufacturer:** MakerHawk
- **Maximum Supply Voltage:** 32 Volts
- **Minimum Supply Voltage:** 12 Volts (DC)
- **Mounting Type:** Surface Mount
- **Voltage:** 32 Volts

## Images

![Bluetooth Power Amplifier Board Stereo - HiFi 2.1 Channel 2X220W+350W Bluetooth 5.1 16-32V Digital Power Audio Amplifier Module Subwoofer Control with AUX/Bluetooth/USB Flash Drive (ZK-AS21) - Image 1](https://m.media-amazon.com/images/I/71awZA+LKGL.jpg)

## Questions & Answers

**Q: Please provide a link to Wuzhi App, since there is no manual.
Is there any?**
A: Download link for Wuzhi Audio APP for Android mobile phones:
 http://www.qingdaowuzhi.cn/appdownload/Wuzhi_Audio.apk

For Apple iOS mobile phones, please search "wuzhi audio" in Apple App Store to download and install.

**Q: There are two versions of these. does it use tpa3251 or tpa3255? what is the minium supply voltage?**
A: Using tpa3251, the minimum supply voltage is 12V DC, and the current should be greater than or equal to 10A.

**Q: will this amp work without the app. Or do you have to have the app for it to work?**
A: I did download the app and ran it once.  Never clicked on it again.   Seems to be a bluetooth amp so you pair with it and it doesn't need an app.  It does sound pretty great.  You can easily talk with someone while extremely loud music is playing.  I have low-end Klipsh bookshelf speakers and a Polk 10 subwoofer.

**Q: Could I run two 5.25" woofers at 2 Ohm well/safely (paired in parallel), or do a series at 8 Ohm? Woofers have a rating of RMS 50W/MAX 100W at 4Ohm.**
A: The subwoofer one way can support 2 ohms, but the stereo there is a minimum of 3 ohms, otherwise the amplifier is easily protected. Speaker resistances greater than required are fine, mainly the lower limit. You can connect speakers in series and in parallel.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice little amp.
*by R***G on June 22, 2024*

Bought this amp to run my open but roofed outdoor ‘cook porch’ sound system. Was using a smaller amp from the same manufacturer; Wuzhi Audio, (MT21), for a year or so, which is good for 50 watts a side into the main speakers, and 100 watts into the subwoofer. (Do an Amazon search on Wuzhi MT21, I tried to do a link, but it came out as crazy long jibberish!) That one worked well, and when I saw this higher powered version, decided to go for it. Both are fed by high current power supplies with plug in speaker pigtails so I can A/B swap them easily. The original reason for the quick disconnect wiring was so the amp and power supply could be removed and stored indoors when not being used, and it made sense wiring the newer one as a ‘drop in’ replacement. As a result, it gave me the ability to do a quick comparison between the two amps. The larger amp has additional inputs in addition to the higher power rating, and the power input has a hard wire terminal strip instead of only the somewhat flimsy small power socket that is supplied with the smaller amp. This would be my only complaint about the smaller amp. Overall the larger amp is a much more robust build, both in power and chassis/component build. As mentioned earlier, the small amp worked well, with clean power delivery throughout its volume range. It is designed to simply not go any louder when turned up beyond its limits, and never clips or distorts. The larger amp shares this functionality and performs extremely well. They both feature the power switch as part of the volume control, which helps prevent turn-on into a volume level left high from a previous listening session. It’s an appreciated design! Have only used them on Bluetooth, which works very well. They connect quickly, are stable, and have decent range. Have used them with an iPhone, iPad, and android tablets with no issues. Have yet to try the USB or AUX input on the higher powered amp. The crossover is smooth and linear, and the separate subwoofer volume control allows balancing the subwoofer level to the main speakers. The bass and treble controls have good range, but I find leaving them at their midpoint works well. At least the ability is there if you need some tweaking to fit your listening environment. For reference, my musical taste is new/old country, classic rock and R & B. I enjoy some volume, but do not punish my speakers or my ears! In my application, the main speakers are 8 ohm, and the subwoofer is 4 ohm, so the amp output is lower than its advertised capability, (specified at 2 ohms), but is everything I need. The output power is roughly double that of the smaller amp, and is most discernible where it drives the subwoofer. As the higher powered amp has an on board cooling fan for the output components, it’s chassis runs cooler than the smaller amp at the same listening levels. Likely also a function of more headroom at the running power output. Kinda toying with the idea of adding a ‘shaker’ module to the porch floor frame to add some ‘butt shaking’ to the audio experience . If that happens, will add my observations to the review. 😏 This review inadvertently turned into one for both the small and larger amps, as the smaller one is my point of reference for these little amps. Being an old audio engineer, I am really impressed what can be done with such a small package. Both are extremely good for their price points, with more power and features available for the larger one. Of note: In order to get the full performance out of the amps, you need appropriate power supplies. “Wall warts” are NOT valid here! The manufacturer does state this in their published specifications . Today’s switcher power supplies are reasonably priced, and have robust clean output power. For the smaller amp, I use a 24vdc @ 15amps, (360 watts) supply. (https://www.amazon.com/dp/B06XK2ZNKC?psc=1&ref=ppx_yo2ov_dt_b_product_details) The larger amp is powered by a 36vdc @ 27.2 amps, (1000 watts) supply. (https://www.amazon.com/dp/B0C5DPSFZG?psc=1&ref=ppx_yo2ov_dt_b_product_details) While the price of the amps is good, consideration must be given to the add on cost of the necessary power supply. As a side note; during a multi day hurricane induced power outage, ran the smaller amp off of a Ryobi 18v 6AH battery, and it sounded great. As this amp is no longer being used on my ‘cook porch’, thinking of doing a project build of a portable Bluetooth ‘boom box’. Yeah, there are lots of commercial ones out there, but a 2.1 version with superior power and speaker size, using a swappable battery would be a fun thing to do, for me anyway! Such is the life of an old retired engineer……..

### ⭐⭐⭐⭐⭐ Great product if you like loud music
*by J***S on August 3, 2023*

I bought this and used it for a day and had to return it because it died. Did are turn and bought it again and have been rocking out with it since,been about a month and I love it. I have it powering a pair of jvc bookshelf speakers. The speakers are rated at 3 ohms probably 200 watt capable easy. I have a 8" sub offer on the unit rated 3 ohms 600 watt capable. These speakers were purchaced at a yard sale but are of godd quality for sure. I connected the to the unit and was very impressed with the sound,the sub hits hard and loud,I get the drums and bass that just blows me away,the bookshelf jvc speakers also are a very good fit and just rock out way better then I could have imagined. The controls are easy to figure out also,bass and treble are adjustable for the bookshelf speakers to suit me needs and adjustment for my sub is aslo impressive. This is a great product for the size of it and I'd also say I haven't used the other features this thing has to offer but I'm sure it all will be good I gave it 5 stars for the sound and it's quality build. Overall great product. I'd buy it again if this ever fails because if you are like me,I love my music loud! Quality sound for it being the size that it is, I'm impressed. My only con is trying to find a proper power cable for the amp itself,if anyone can guide me to one that would be great. As for now I'm using Alitov 110 volt power output 36 volt 4 amp 144 watt power adapter. So far it works good but not for sure if it the correct power source for this. Had trouble finding this power supply online but it's been working so far. I'd like to find something better and if someone can point me to it that would be great. Great product though,I love this thing and would definitely but it again if it ever craps out on me.

### ⭐⭐⭐⭐⭐ Review
*by A***Y on November 7, 2025*

Exelente producto,superó mis espectativas 100%

## Frequently Bought Together

- Bluetooth Power Amplifier Board Stereo - HiFi 2.1 Channel 2X220W+350W Bluetooth 5.1 16-32V Digital Power Audio Amplifier Module Subwoofer Control with AUX/Bluetooth/USB Flash Drive (ZK-AS21)
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- Facmogu 36V 5A Power Supply Adapter, 180W AC 100V~240V to DC 36 Volt 5A Converter Transformer with Barrel Connector 5.5x2.5mm & 5.5x2.1mm, AC/DC Power Converter Desktop Adpater for Home Audio Amp

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-02-04*