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Item #:
90948886
ZK-AS21 TPA3255 Bluetooth 5.1 Power Amplifier Board HiFi 2.1 Channel 220Wx2+350W Digital Audio Receiver AMP Board with Treble and Bass Control for
Item #:
90948886
ETB 7921
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
In stock
Imported from USA store
QTY:
Order now and get it around Wednesday, July 22
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Experience high-quality sound with our 2.1 channel BT power amplifier, delivering 220W+220W+350W of true audio excellence.
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Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
High Power Output
Delivers a remarkable 220W per channel and 350W subwoofer output, ensuring robust sound performance for high-fidelity audio systems.
Advanced Bluetooth 5.1
Equipped with Bluetooth 5.1 for superior connectivity, allowing seamless streaming from various devices with minimal latency and enhanced audio quality.
User-Friendly Controls
Features treble and bass control knobs, enabling personalized sound adjustments that empower users to customize their listening experience for optimal satisfaction.
Product Details
- 【HI-FI & Stereo】High-quality 2.1-channel 220W+220W+350W Bluetooth 5.1 amplifier board, with multiple audio input methods such as AUX, Bluetooth, U disk, and USB sound card, allowing you to enjoy the fun of music anytime, anywhere.
- 【Function upgrade】Supports APP control, and can modify Bluetooth name and password settings. The 5.1 Bluetooth version has settings such as adjustable volume, sound on/off, and timed shutdown. Comes with 10 natural sleep songs and up to 1023 sound combinations. Not only can you display the playlist of the U disk, you can also shake the phone to change songs or use the dial/mode key to switch songs.
- 【Professional chip】Using 2 Texas Instruments TPA3255 chips, it is a high-performance Class D amplifier with Class D efficiency, which can bring true high-end sound quality. The device adopts advanced integrated feedback design and proprietary high-speed gate driver error correction technology. This technology enables the device to maintain ultra-low distortion across the entire audio band while providing high-definition sound quality.
- 【Super Compatibility】 5.1 Bluetooth version, with higher transmission efficiency, more stability and longer transmission distance. In open space, the wireless range can reach 15 meters (49 feet). It can be widely used in various devices such as tablets, PCs, TVs, smartphones, laptops, etc.
- 【Safety Protection】 The amplifier board has short circuit, overcurrent, overheating and anti-static protection to prevent complete failure. When overloaded, the device will report the fault to the processor to protect itself from damage.
| Voltage | 12 Volts (DC) |
| Maximum Supply Voltage | 38 Volts (DC) |
| Minimum Supply Voltage | 16 Volts (DC) |
| Mounting Type | Through-Hole Mount |
| Number of Channels | 2 |
| Output Power | 350 Watts |
| Package Type Name | Protective Shell |
| Supply Current | 10 Amps |
| Maximum Output Power | 350 watts |
| Material Type | PCB, Plastic |
| Manufacturer | Hosyond |
| Model | ZK-AS21 |
| Brand Name | Hosyond |
| UPC | 768572762794 |
| Included Components | Amplifier Board |
| Specification Met | Basic Safety Standards |
| Item Weight | 2 lbs (910 grams) |
What's in the box
Amplifier Board
Who Should Buy?
-
Home Audio Enthusiasts
Ideal for users wanting high-quality sound in their home audio systems with customizable treble and bass settings.
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DIY Speaker Builders
Perfect for those who enjoy constructing their own speaker systems needing robust amplification with Bluetooth capabilities.
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Portable Sound Solutions
Great choice for individuals desiring a powerful amplifier for temporary setups like outdoor events or gatherings.
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Casual Listeners
Not suitable for users who prefer simple plug-and-play audio solutions without advanced features or adjustments.
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Small Spaces
May not be ideal for users with limited space, as it requires sufficient room for speaker setup and components.
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Budget-Conscious Buyers
Not recommended for those looking for a low-cost audio solution, as this product targets higher-end audio quality.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is the power output of the ZK-AS21 amplifier board?
Answer: The ZK-AS21 amplifier board delivers a power output of 220Wx2 channels and an additional 350W for the subwoofer channel, making it an ideal choice for both casual listeners and audiophiles. The high output ensures that it can drive even larger speakers, providing a rich and powerful audio experience across various settings. For DIY audio projects, this level of power output can be used in home theater systems, high-quality music setups, or even outdoor events where robust sound is essential. -
Question:
How does Bluetooth 5.1 enhance the performance of the ZK-AS21 amplifier?
Answer: Bluetooth 5.1 significantly improves the connectivity and audio quality of the ZK-AS21 amplifier board, offering a more stable connection with a longer range. This allows users to stream high-fidelity audio from their devices without interruptions, even in larger spaces. For example, this means you could easily stream music from your smartphone to your sound system during a party without worrying about dropped connections or audio lag. -
Question:
What are the benefits of treble and bass control on the ZK-AS21?
Answer: The treble and bass control features on the ZK-AS21 amplifier board enable users to tailor their audio experience to suit their precise preferences. By adjusting the treble, you can enhance the clarity of higher frequencies, while the bass control allows for deeper, fuller sounds. This customization is particularly beneficial for listening to different genres of music or for enhancing dialogue clarity in movies, providing a truly personalized sound experience. -
Question:
Is the ZK-AS21 suitable for home theater systems?
Answer: Yes, the ZK-AS21 is highly suitable for home theater systems due to its powerful output and multiple channels. The 2.1 channel setup not only drives stereo sound but also offers a dedicated subwoofer channel, enhancing the overall cinematic experience with immersive surround sound. This makes it perfect for movie nights or binge-watching sessions where sound quality elevates the viewing experience. -
Question:
Can beginners utilize the ZK-AS21 for DIY projects?
Answer: Absolutely! The ZK-AS21 is designed to be user-friendly, making it accessible for beginners in DIY audio projects. Its straightforward design allows for easy integration into various setups, whether you're upgrading an existing system or building one from scratch. Additionally, the availability of treble and bass controls provides users with the flexibility to experiment and learn about sound tuning without being overwhelmed by complex configurations. -
Question:
What components do I need to use with the ZK-AS21 amplifier board?
Answer: To utilize the ZK-AS21 amplifier board, you will typically need speakers, a suitable power supply, and audio source devices such as smartphones, computers, or televisions. The amplifier can drive passive speakers, so ensuring compatibility between your speakers and the amplifier’s output is essential for optimized performance. This setup is perfect for those who want to create a fully functional sound system tailored to their preferences. -
Question:
Does the ZK-AS21 come with any built-in protections?
Answer: Yes, the ZK-AS21 amplifier board typically includes built-in protection mechanisms such as over-current protection and thermal protection. These features help to ensure the longevity of the device by preventing overheating and overload conditions. This reliability is crucial when using the amplifier at higher power levels, such as during parties or other high-energy gatherings where sound intensity is paramount. -
Question:
What is the ideal use case for the ZK-AS21 amplifier board?
Answer: The ideal use case for the ZK-AS21 amplifier board is in DIY audio setups where high-quality sound is a priority. It's perfect for enthusiasts looking to build a custom sound system for home cinema, gaming, or music playback, providing flexibility in speaker choice and placement. Whether you are setting up a sound system for casual listening or professional-grade audio, the ZK-AS21 delivers performance that meets diverse requirements. -
Question:
What type of speakers should I pair with the ZK-AS21 amplifier?
Answer: When pairing speakers with the ZK-AS21 amplifier board, consider using high-efficiency passive speakers that are compatible with its power output. The board is capable of handling a range of speaker impedances, ideally between 4 to 8 ohms. This allows for pairing with various speaker types, from bookshelf speakers to larger floor-standing models, ensuring that you achieve optimal sound quality across different listening environments. -
Question:
Where can I buy the ZK-AS21 amplifier board in Ethiopia?
Answer: You can purchase the ZK-AS21 TPA3255 Bluetooth 5.1 Power Amplifier Board from Ubuy in Ethiopia. Ubuy offers a reliable platform for acquiring DIY audio components like this amplifier, allowing you to navigate through various user-friendly options to find the right product that meets your audio needs. Ubuy provides convenient access for customers in Ethiopia looking to enhance their sound experience.
Hosyond Amplifiers Editorial Review
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Customer Reviews & Ratings
97 customers ratings
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4 Star
9%
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2 Star
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Mohd
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“The product received very good packaging & safe…Thank You”
16 June 2026 · via Trustpilot
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Shawati
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“Accurate delivery timing given”
16 June 2026 · via Trustpilot
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“Not madly expensive like I thought, and much quicker than promised.”
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6/7/2026 · via Trustpilot
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“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”
12 June 2026 · via Trustpilot
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ETB 7921
Order now and get it around Wednesday, July 22
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
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Features & Benefits
- High-quality 2.1-channel amplifier with a total output of 220W for R&L channels and 350W for the subwoofer.
- Supports multiple audio inputs: Bluetooth 5.1, AUX, USB, allowing music enjoyment anywhere.
- Equipped with advanced Texas Instruments TPA3255 chips for unparalleled sound quality and low distortion.
- Features APP control with adjustable settings and 10 natural sleep sound options.
- 5.1 Bluetooth version ensures compatibility with various devices up to 15 meters range.
- Built-in safety features protect against overcurrent, overheating, and short circuits for lasting performance.
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