10 Best Zkht21 of 2025

Tested and Reviewed: Top 10 Zkht21 deals with expert ratings from 8.1 to a perfect 10

March 2026 Edition

Editor's Choice

9.7

Hosyond

ZK-HT21 TDA7498E Bluetooth Amplifier Board 160W×2+220W Subwoofer 2.1 Channel Audio Receiver Power Amplifier Module with Treble and Bass Control for DIY Speakers

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Editor's bottom line:

“This zkht21 is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

3-in-1 multi-function input: This power amplifier board integrates AUX, Bluetooth and USB input methods, allowing you to connect a variety of audio sources as you like. What's more convenient is that you can easily switch between input modes and songs through the dial button, and enjoy the fun of music to the fullest.
Powerful sound field experience: integrated TDA7498E power amplifier chip, supports 2.1 channel configuration, including left channel, right channel and subwoofer output. The left and right channels provide an output power of 160W each, and the subwoofer reaches a maximum output of 220W, creating an immersive audio experience for you.
Wide power supply adaptation range: The power amplifier board is suitable for DC15~36V power supply, and also has undervoltage protection function when it is lower than 9V, and supports 12V power supply option. This means that you can choose a suitable power supply method according to your actual needs without worrying about power supply issues.
Compatible with a variety of speakers: the board is suitable for 30-200W, 4-8 speakers, so it can perfectly match with speakers of various specifications. Whether it is a small speaker or a large audio equipment, it can be coordinated with the power amplifier board.
Perfect protection mechanism: Our power amplifier board has built-in comprehensive protection mechanism, including anti-reverse polarity, undervoltage, overheating, overcurrent and short circuit protection. These smart protection features keep your audio system and speakers safe, so you can enjoy your music with confidence.

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Picked by 397 people today

9.5

Cozychord

ZK-HT21 2.1 Channel Mini Bluetooth Amplifier Board,160W×2+220W High Power Stereo Subwoofer Amp with TDA7498E Hi-Fi Chip and Dual Expansion Ports, BT USB AUX Input DC 15-36V for DIY Home Speakers

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Main Highlights

Versatile 3-in-1 Audio Input This mini Bluetooth amplifier board offers incredible flexibility as a 3-in-1 amp, supporting AUX, Bluetooth, and USB connections. Whether you use it as a Bluetooth amp or mini amplifier, easily connect your phone, laptop, or other devices and switch between inputs with the intuitive dial control.
High-Power 2.1 Channel Audio Engineered around the powerful TDA7498E chip, this 2.1 Bluetooth amplifier delivers impressive 160W per channel plus a dedicated 220W subwoofer output. More than a standard 2 channel amp, this amplifier produces rich, clear stereo sound with deep, resonant bass for an immersive home theater or desktop audio experience.
Broad Power Compatibility Designed for versatile use, this amplifier board operates on a wide DC 15V36V range with built-in undervoltage protection. , giving you the freedom to choose the ideal power supply for your mini Bluetooth amplifier setup with complete safety and stability.
Compatible with Various Speakers This versatile Bluetooth amplifier for speakers is compatible with 30200W, 48 speakers, making it an ideal amp board for both bookshelf speakers and powerful subwoofers. It's the perfect amplifier Bluetooth core for building your own DIY sound system or upgrading an existing one.
Comprehensive Built-in Protection Equipped with reverse polarity, undervoltage, overheating, overcurrent, and short-circuit protection, this robust Bluetooth amplifier board safeguards your investment. This reliable bluetooth mini amplifier ensures your mini bluetooth amp and speakers enjoy safe, durable, and long-term performance.

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9.5

ARRAROWN

Bluetooth Amplifier Board, ZK-HT21 2.1 Channel 160W x 2+220W Subwoofer Stereo Mini Audio Power Amplifier Module TDA7498E HiFi Chips,BT USB AUX Input DC 15-36V for DIY Home Speakers

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Main Highlights

2.1 CH Subwoofer Audio Amplifier Board This ZK-HT21 power amplifier is 2.1channel, allows you to connect 2 passive speakers and drive a subwoofer, comes with Treble and Bass buttons, independent subwoofer volume adjustment buttons and 20-200Hz subwoofer frequency adjustment buttons, which is very friendly for audiophiles, you can adjust the Treble and Bass buttons, make the bass more shocking and the treble clearer, make the sound more layered
160W*2 + 220W High Power Output This HT21 audio amplifier has 160W*2 output power for left and right channel and 220W output power for subwoofer, it can drive two high-power speakers (30-200W, 4-8 ohms) and one subwoofer (30-220W), and the adapted power supply is DC15-36V/8A or above. Note: The higher the power supply voltage/current, the higher the output power, the lower the speaker resistance, the higher the output power, the adapted power supply should higher than the actual working power of the amplifier
HIFI Stereo Audio Power Amplifier The ZK-HT21 power amplifier board built-in two TPA7498E power amplifier chips, TPA7498E is a high-performance class D power amplifier chip, can make thedevice maintain ultra-low distortion in the whole audio frequency band and show high-definition sound quality at the same time. The wiring around the chip is an window tin spraying design to increase the output power. 4 x Low noise preamplifiers 5532 group can improve the sound quality and volume, increase the gain
Multiple Audio Input Modes This Mini amplifier receiver built-in Bluetooth 5.0, USB flash disk, USB sound card and 3.5mm AUX Input. Bluetooth 5.0 mode, faster transmission speed, lossless decoding, lower distortion rate, connection distance to audio equipment is 15m/49ft. Note: When using AUX mode, please confirm that the Bluetooth connection of this module has been disconnected
With Protective Function This Bluetooth Amp module is designed with multiple protection mechanisms, include over-voltage protection, under-voltage protection, over-heat protection, short-circuit protection, with case to protective it. Besides, There is a Long-life Ultra Silent Fan(locked rotor, no burning,no noise) above audio chips, for heat dissipation and protection of Bluetooth amplifier board

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9.2

AEXCVG

ZK-HT21 Bluetooth Amplifier Board 160W×2+220W Subwoofer 2.1 Channel Audio Amplifier Bluetooth Module with Treble and Bass Control,AUX/Bluetooth/USB Inputs for Passive Speakers

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Main Highlights

AUX,Bluetooth,USB and Subwoofer Inputs: The Bluetooth amplifier board integrates AUX,Bluetooth,USB and Subwoofer Inputs.There is 3.5 MM AUX inputs,you can connect cellphone,laptop or TV etc (The wire connect AUX input is not included in the package).With Bluetooth 5.0 version,it is easy to connect quickly within 10M/32FT unobstructed.USB and Subwoofer Inputs also can be used according to your need. Note: When using AUX mode, please confirm that the Bluetooth connection of this module has been disconnected;
Perfect Protection Mechanism: The Bluetooth amplifier board is designed with protection mechanism, including overvoltage, undervoltage, overheating, DC detection protection and short circuit protection. When overload happens, it will protect itself from damage.
TDA7498E ChipThe Bluetooth amplifier board is equipped with two imported original TDA7498E chip, 2.1 Channel configuration, that is left channel (maximum power output 160W), right channel (maximum power output 160W) and subwoofer output (maximum power output 220W).
Compatible Speakers: The Bluetooth amplifier board are suitable for 30-200W, 4-8 passive speakers, so you can match different passive speakers as your need. (Passive speakers only,not Bluetooth speakers or active speakers).The Adapted power supply is DC 15-36V(less than 9V undervoltage protection.The higher voltage,the higher the output power)
Multifunctional Dial ButtonThe dial button is multifunctional:Press Down-Short press: pause/play,Long press: Switch input mode(Bluetooth/AUX/USB Flash drives);Dial Right- Short press: Play the next music,Long press: Volume increases;Dial Left-Short press: Play the previous music,Long press: Volume decrease.

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9.0

DiGiYes

DiGiYes ZK-HT21 Bluetooth Amplifier Board TDA7498E HiFi Chips 2.1 Channel 160W x 2 + 220W Subwoofer Stereo Mini Audio Power Amplifier Module for DIY Home Speakers with Treble and Bass Control

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Main Highlights

The ZK-HT21 power amplifier board built in TDA7498E power amplifier chips, supports 2.1 channel configuration, including left channel, right channel and subwoofer output. The left and right channels provide an output power of 160W each, and the subwoofer reaches a maximum output of 220W, creating an immersive audio experience for you. The upgraded HT21 board adds THREE XH2.54-3P terminals, the Power Amplifier Input Interface, Microphone Board Input Interface and Microphone Board Input Interface
This power amplifier board integrates 3.5 mm AUX Input, Bluetooth 5.0 and USB input methods, allowing you to connect a variety of audio sources as you like. Note: When using AUX mode, please confirm that the Bluetooth connection of this module has been disconnected
The power amplifier board is suitable for 30-200W, 4-8 speakers, and the adapted power supply is DC15-36V/8A, so it can perfectly match with speakers of various specifications. Whether it is a small speaker or a large audio equipment, it can be coordinated with the power amplifier board
The board has under-voltage protection function when it is lower than 9V, and supports 12V power supply option. This means that you can choose a suitable power supply method according to your actual needs without worrying about power supply issues(The power adapter power must be higher than the actual working power of the amplifier)
This Bluetooth amp module is designed with multiple protection mechanisms, including anti-reverse polarity, under-voltage, overheating, over-current and short circuit protection. Besides, there is a long life ultra quiet fan above audio chips, these smart protection features keep your audio system and speakers safe

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8.8

CUQI

ZK-HT21 Bluetooth Amplifier Board 2.1 Channel Subwoofer 160W+160W+220W Bluetooth 5.0 Amplifier with Treble and Bass Control for DIY Speakers

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Main Highlights

Three Audio Input Methods: Supports AUX, USB, and Bluetooth connections to link with more audio devices, delivering high-definition, low-distortion sound quality. The Bluetooth connection range with audio devices is 15 meters/49 feet. Note: When using AUX mode, ensure the module's Bluetooth connection is disconnected.
Triple-Channel Audio Experience: The 2.1 Bluetooth amplifier module features a built-in DA7498E chip, delivering 160W output for left and right channels and 220W for the subwoofer, providing a more transparent and clearer sound experience.
Effective Heat Dissipation: The semi-open structure incorporates a silent fan that efficiently reduces the operating temperature of the Bluetooth amplifier board, thereby extending its service life.
Multi-protection: The Bluetooth amplifier board features built-in protection against reverse polarity, short circuits, overheating, overcurrent, and other hazards, ensuring safe operation while delivering Hi-Fi sound quality.
Wide Compatibility: Supports DC 1536V power supplies. Triggers under-voltage protection below 9V. Also supports 12V voltage. Compatible with 30200W, 48 speakers. The broad power supply voltage range allows greater freedom in power supply selection and works with more audio system models.

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8.6

DAJUNGUO

S350HS TPA3251 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 220W×2+350W, 12V-38V Audio Power Amplifier Module with Treble and Bass Control,Black (S350HS)

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Main Highlights

TPA3251 HIFI CHIPThe 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 METHODThe 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 CONTROLIf 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 FUNCTIONS350HS 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

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8.3

NebulaGo

ZK-HT21 TDA7498E 160W×2+220W Subwoofer 2.1 Channel Audio Power Amplifier with Treble and Bass Control

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Main Highlights

ZK-HT21 TDA7498E 160W×2+220W Subwoofer 2.1 Channel Audio Power Amplifier with Treble and Bass Control

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8.1

ARRAROWN

Audio Amplifier Board, ZK-1602T Bluetooth 5.0 Power Amp for Home Speakers 2.0 Channel 160W+160W Stereo Mini Amplifier Module TDA7498E Chip W/TB, USB, AUX, DC 15-36V

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Main Highlights

2.0CH Stereo Audio Amplifier Board This ZK-1602T power amplifier is 2.0 channel 160W+160W rated power, dual TDA7498E chips drive, allows you to connect 2 passive speakers(30~200W,4~8), filter circuit design, insure the output of the self-filtering, so that the sound is more pure, no waves and noise, is a true audiophile hi-fi amplifier, comes with Treble and Bass buttons, which is very friendly for audiophiles, make the bass more shocking and the treble clearer
Treble, Bass and Dial Wheel AdjustmentThis ZK-1602T digital Amp board with independent treble and bass adjustment buttons,you can directly adjust the treble and bass through the module, for those with more demanding music sound effects, they can adjust the treble and bass buttons to adjust the sound effects to suit their style. The Dial Wheel button is a multi-functional button that can be used to adjust the mode, volume as well as previous, next and pause music etc.
HIFI Audio Power Amplifier The 1602T power amplifier board built-in two TDA7498E power amplifier chips, the TDA7498E chip is a high-performance class D power amplifier chip, can make thedevice maintain ultra-low distortion in the whole audio frequency band and show high-definition sound quality at the same time. The wiring around the chip is an window tin spraying design to increase the output power, the filter circuit can improve the sound quality and noise reduction, reduced sound distortion
Multiple Audio Input Modes This Mini amplifier receiver built-in Bluetooth 5.0, USB flash disk, USB sound card and 3.5mm AUX Input. Bluetooth 5.0 mode, faster transmission speed, lossless decoding, lower distortion rate, connection distance to audio equipment is 10m/39ft. Note: When using AUX mode, please confirm that the Bluetooth connection of this module has been disconnected
With Protective Function This Bluetooth Amp module is designed with multiple protection mechanisms, include over-voltage protection, under-voltage protection, over-heat protection, short-circuit protection, with case to protective it. Besides, There is a Long-life Ultra Silent Fan(locked rotor, no burning,no noise) above audio chips, for heat dissipation and protection of Bluetooth amplifier board

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8.1

Senzooe

ZK-HT21 2.1 channel TDA7498E power amplifier module subwoofer 160Wx2+220W

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Main Highlights

ZK-HT21 2.1 channel TDA7498E power amplifier module subwoofer 160Wx2+220W
approx size:145x126x28mm

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Our Best Overall Choice

Best Choice

9.7

Hosyond

ZK-HT21 TDA7498E Bluetooth Amplifier Board 160W×2+220W Subwoofer 2.1 Channel Audio Receiver Power Amplifier Module with Treble and Bass Control for DIY Speakers

Free Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

3-in-1 multi-function input: This power amplifier board integrates AUX, Bluetooth and USB input methods, allowing you to connect a variety of audio sources as you like. What's more convenient is that you can easily switch between input modes and songs through the dial button, and enjoy the fun of music to the fullest.
Powerful sound field experience: integrated TDA7498E power amplifier chip, supports 2.1 channel configuration, including left channel, right channel and subwoofer output. The left and right channels provide an output power of 160W each, and the subwoofer reaches a maximum output of 220W, creating an immersive audio experience for you.
Wide power supply adaptation range: The power amplifier board is suitable for DC15~36V power supply, and also has undervoltage protection function when it is lower than 9V, and supports 12V power supply option. This means that you can choose a suitable power supply method according to your actual needs without worrying about power supply issues.
Compatible with a variety of speakers: the board is suitable for 30-200W, 4-8 speakers, so it can perfectly match with speakers of various specifications. Whether it is a small speaker or a large audio equipment, it can be coordinated with the power amplifier board.
Perfect protection mechanism: Our power amplifier board has built-in comprehensive protection mechanism, including anti-reverse polarity, undervoltage, overheating, overcurrent and short circuit protection. These smart protection features keep your audio system and speakers safe, so you can enjoy your music with confidence.

Show Price

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