Domestic Hifi Chip
This Bluetooth amplifier board features a HiFi power amplifier chip that delivers up to 50W per channel.
Large Heat Sink
The large heatsink quickly dissipates heat, allowing the chip to deliver sustained high power without risk of damage.
Premium Wiring Terminals
Wiring is quick and hassle-free, with no damage to the wires. The 5.5mm x 2.1mm DC input accepts most laptop power adapters.
Treble, Bass & Sub Control
Endless sound possibilities. Experience a mini movie theater at home — all from a tiny amp.
How to choose a power supply?
Use a low-ripple power supply. High ripple causes noise/malfunction. Higher voltage/current = more power. 12V1A for 3-4" speakers; 19V5A+ for 8-10". Low voltage distorts; low current drops voltage or degrades sound.
Introduction to audio input modes
Two inputs: Bluetooth (priority) and AUX. Bluetooth auto-reconnects once connected. No Bluetooth connection? Insert AUX for AUX mode. Note: Before using AUX, ensure Bluetooth is disconnected
How to adjust the main volume?
The main volume knob is used to adjust the main volume. The main volume increases when turning right, and decreases when turning left.
The main volume has an impact on the volume of both the left and right channels and the subwoofer.
It’s okay if the sound is low, but when the sound becomes louder, there is a phenomenon of cloudy sound?
The sound is distorted. Please reduce the total volume or switch to a higher voltage adapter power supply.
It’s okay if the sound is low, but when the sound becomes louder, there is a phenomenon of sound lag?
Insufficient input power triggers intermittent supply shutdown. Replace with a higher-power supply. Or excessive power overheats the board, causing thermal protection. Reduce power or improve cooling.
Product Comparison Charts
 ZK-MT21 |  YS-S350H |  ZK-TB21 |  ZK-1002T | |
|---|---|---|---|---|
Customer Reviews | — | — | — | — |
Price | — | — | — | — |
2.1 Channels | ? | ? | ? | ? |
Amplifier Chip | Domestic power amplifier chip | TPA3255 | TPA3116D2 | TPA3116D2 |
Input Method | BT/AUX | BT/AUX/USB | BT/AUX | BT/AUX |
Bluetooth Version | 5.0 | 5.1 | 5.0 | 5.0 |
Adapted Power Supply | DC 12-24V/5A or above | DC 18-38V/10A silent below 18V | DC 12-24V/5A or above | DC 12-24V/5A or above |
Output Power | 50W+50W+100W | 220W+220W+350W | 50W+50W+100W | 100W+100W |
Adapted Speaker | 20-100W,4-8ohm | 20-300W,4-8ohm | 20-100W,4-8ohm | 20-200W,4-8ohm |
Input Sensitivity | 500mV | 500mV | 500mV | 500mV |
Product Size | 3.7*3.5*0.9inch | 5.2*5.1*1.0inch | 4.7*3.9*0.8inch | 4.3X2.8X0.83inch |
HOCHANAN has specialized in premium home audio-visual systems for years.
HOCHANAN specializes in premium home audio-visual systems , we have refined high-fidelity equipment—from advanced amplifiers to precision analog components—to elevate the listener's experience. We are committed to quality and our community, actively using customer feedback to enhance our products and deliver innovative, market-relevant technology.
HOCHANAN Home Audio Amplifier
Domestic Hifi Chip
This Bluetooth amplifier board features a HiFi power amplifier chip that delivers up to 50W per channel.
Large Heat Sink
The large heatsink quickly dissipates heat, allowing the chip to deliver sustained high power without risk of damage.
Premium Wiring Terminals
Wiring is quick and hassle-free, with no damage to the wires. The 5.5mm x 2.1mm DC input accepts most laptop power adapters.
Treble, Bass & Sub Control
Endless sound possibilities. Experience a mini movie theater at home — all from a tiny amp.
| Product name | 2.1 channel Bluetooth audio amplifier module |
|---|---|
| Product model | ZK-MT21 |
| Bluetooth version | 5.0 (unobstructed, 10 meters) |
| Input sensitivity | 500mV |
| Input method | AUX + Bluetooth |
| Number of channels | 2.1 channels |
| Power amplifier chip | Domestic power amplifier chip |
| Adapted power supply | DC 12-24V/5A or above (the higher the voltage, the greater the output power) |
| Adapted speaker | 20-100W, 4-8O |
| Output power | Left and right channels = 50W ,Subwoofer = 100W |
| Protection mechanism | Overvoltage, undervoltage, overheating, short circuit protection |
| Product size | 3.66 in × 3.54 in × 0.87 in /93mm * 90mm * 22mm |
| Product weight | approximately 6.53oz/185g (including packaging) |
How to choose a power supply?
Use a low-ripple power supply. High ripple causes noise/malfunction. Higher voltage/current = more power. 12V1A for 3-4" speakers; 19V5A+ for 8-10". Low voltage distorts; low current drops voltage or degrades sound.
Introduction to audio input modes
Two inputs: Bluetooth (priority) and AUX. Bluetooth auto-reconnects once connected. No Bluetooth connection? Insert AUX for AUX mode. Note: Before using AUX, ensure Bluetooth is disconnected
How to adjust the main volume?
The main volume knob is used to adjust the main volume. The main volume increases when turning right, and decreases when turning left.
The main volume has an impact on the volume of both the left and right channels and the subwoofer.
It’s okay if the sound is low, but when the sound becomes louder, there is a phenomenon of cloudy sound?
The sound is distorted. Please reduce the total volume or switch to a higher voltage adapter power supply.
It’s okay if the sound is low, but when the sound becomes louder, there is a phenomenon of sound lag?
Insufficient input power triggers intermittent supply shutdown. Replace with a higher-power supply. Or excessive power overheats the board, causing thermal protection. Reduce power or improve cooling.
Product Comparison Charts
ZK-MT21 | YS-S350H | ZK-TB21 | ZK-1002T |
|---|---|---|---|
| Customer Reviews | |||
| — | — | — | — |
| Price | |||
| — | — | — | — |
| 2.1 Channels | |||
| ? | ? | ? | ? |
| Amplifier Chip | |||
| Domestic power amplifier chip | TPA3255 | TPA3116D2 | TPA3116D2 |
| Input Method | |||
| BT/AUX | BT/AUX/USB | BT/AUX | BT/AUX |
| Bluetooth Version | |||
| 5.0 | 5.1 | 5.0 | 5.0 |
| Adapted Power Supply | |||
| DC 12-24V/5A or above | DC 18-38V/10A silent below 18V | DC 12-24V/5A or above | DC 12-24V/5A or above |
| Output Power | |||
| 50W+50W+100W | 220W+220W+350W | 50W+50W+100W | 100W+100W |
| Adapted Speaker | |||
| 20-100W,4-8ohm | 20-300W,4-8ohm | 20-100W,4-8ohm | 20-200W,4-8ohm |
| Input Sensitivity | |||
| 500mV | 500mV | 500mV | 500mV |
| Product Size | |||
| 3.7*3.5*0.9inch | 5.2*5.1*1.0inch | 4.7*3.9*0.8inch | 4.3X2.8X0.83inch |
HOCHANAN has specialized in premium home audio-visual systems for years.
HOCHANAN specializes in premium home audio-visual systems , we have refined high-fidelity equipment—from advanced amplifiers to precision analog components—to elevate the listener's experience. We are committed to quality and our community, actively using customer feedback to enhance our products and deliver innovative, market-relevant technology.
HOCHANAN Home Audio Amplifier