ZK-TB21S TB21 MT21S MT21 2.1 Channel 2*50W+100W TPA3116D2 Audio Amplifier

Wuzhi Audio APP download link:

http://www.qingdaowuzhi.cn/app/Wuzhi_Audio_V1.0.1.apk

Before, the left and right channels of AUX audio input of the product were mixed, and stereo sound could not be emitted, which brought trouble to customers. Now the TB21S product has been modified to generate stereo.

Note!

It needs to be aembled by yourself, and the material package is given a screwdriver.

The suitable power supply of the product is DC power supply, and AC power supply is not allowed!

The color of the product may be slightly different from the picture due to the differences of light, angle and shooting equment.

The product size is measured manually. Please allow slight deviation in the measurement data and make sure you don't mind.

ZK-TB21S， ZK-TB21，ZK-MT21S，ZK-MT21， the four products are 2.1 channel audio power amplifier module, 50Wx2 stereo + 100W subwoofer.

Each product has different characteristics. The power amplifier ch, version and whether it supports Wuzhi Audio APP are different:

ZK-TB21S is an upgraded version of ZK-TB21. It adopts TPA3116D2 power amplifier ch and version 5.1. It increases the midrange adjustment of stereo part, and forms a full coverage of ba, midrange and sound effects in combination with subwoofer + . The human voice is highlighted and clearer. High end is added for up and down song selection, pause / play, and AUX / / USB sound source switching selection.AUX external lead XH2.54-3P socket is added.The subwoofer frequency adjustment is changed to internal board debugging. After debugging, the customer will not change at will. input + AUX input + USB flash disk input + USB sound card input, support Wuzhi Audio APP.

ZK-TB21 also adopts TPA3116D2 power amplifier ch, version 5.0, input + AUX input, and does not support Wuzhi Audio APP.

ZK-MT21S is an upgraded version of ZK-MT21. It adopts Chinese power amplifier ch and version 5.1. It increases the midrange adjustment of stereo part, and forms a full coverage of ba, midrange and sound effects in combination with subwoofer + . The human voice is highlighted and clearer. High end is added for up and down song selection, pause / play, and AUX / / USB sound source switching selection. The subwoofer frequency adjustment is changed to internal board debugging. After debugging, the customer will not change at will. input + AUX input + USB flash disk input + USB sound card input, support Wuzhi Audio APP.

ZK-MT21 adopts Chinese power amplifier ch, version 5.0, input + AUX input, and does not support Wuzhi Audio APP.

Wuzhi Audio APP is an audio app with timed shutdown function. It has its own sound scene, 10 kinds of natural sounds and up to 1023 sound combinations. Comprehensive functions: you can modify the name of each product. Set the connection paword. You can adjust the volume of the prompt tone. The switch prompt tone can be turned on or off. USB flash disk playlist function, open USB flash disk playlist, select music at will, and support shaking to switch songs. Support customized 10 segment sound effects and arbitrary adjustment to make up for deficiencies, so that different speakers can achieve better sound effects.

Model： ZK-TB21S

Brand: Wuzhi Audio

Product Name: 2.1channel 5.1 power amplifier module

Product Model: ZK-TB21S

Amplifier Ch: TPA3116D2

Channels: 2.1 channel (left channel + right channel + subwoofer)

Audio Input: AUX + +USB disk + USB sound card

Version: 5.1

Switching Mode: Mechanical switch (without long pre and wait)

Adaptive Power supply: DC12~24V, ≥8A (Do not connect to AC)

Adapter Speaker:

L&R channels 20-50W, 4-8Ω

Subwoofer 20-100W, 3-8Ω

Output power:

R&L channel≤50W

Subwoofer≤100W

Protection Mechanism: Input anti reverse connection, overheating, overcurrent and short circuit protection

Product Size: 119*100*22mm

Product Weight: about 196g

Package Weight: about 248g

Model： ZK-TB21

Brand: Wuzhi Audio

Product Name: 2.1 channel TPA3116D2 digital power amplifier module with Tone

Product Model: ZK-TB21

Version: 5.0

Input Sensitivity: 500mV

Audio Input: AUX + 5.0

Channels: 2.1

Ch Solution: TPA3116D2

Power Range: DC12~24V/5A above (Do not connect to AC)

Adapter Speaker: 20W~100W, 4~8Ω

Output Power:

Max50W @ R&L channel

Max100W @ subwoofer

Working Type: Cla D

DC socket: 5.5*2.1mm

Protection Mechanism: overvoltage, under-voltage, overheating, DC detection, short circuit protection

Product Size: 118mm*100mm*22mm

Product Weight: about 195g

Package Weight: 256g

Model： ZK-MT21S

Brand: Wuzhi Audio

Product Name: 2.1channel audio power amplifier board module

Product Model: ZK-MT21S

Amplifier Ch: Chinese ch

Channels: 2.1 channel (left channel + right channel + subwoofer)

Audio Input: AUX + +USB disk + USB sound card

Version: 5.1

Switching Mode: Mechanical switch (without long pre and wait)

Adaptive Power supply: DC12~24V, ≥8A (Do not connect to AC)

Adapter Speaker:

L&R channels 20-50W, 4-8Ω

Subwoofer 20-100W, 4-8Ω

Output power:

R&L channel≤50W

Subwoofer≤100W

Protection Mechanism: Input anti reverse connection, overheating, overcurrent and short circuit protection

Product Size: 93*96*22mm

Product Weight: about 136g

Package Weight: about 187g

Model： ZK-MT21

Brand: Wuzhi Audio

Product Name: 2.1 channel audio power amplifier module

Product Model: ZK-MT21

Version: 5.0

Input Sensitivity: 500mV

Audio Input: AUX + 5.0

Channels: 2.1

Ch Solution: Chinese ch

Power Range: DC12~24V/5A above (Do not connect 24V battery pack, do not connect to AC)

Adapter Speaker: 20W~100W, 4~8Ω

Output Power:

Max50W @ R&L channel

Max 100W @ subwoofer

DC socket: 5.5*2.1mm

Protection Mechanism: against reverse connection, overheating, overcurrent and short circuit protection

Product Size: 93mm*90mm*22mm

Product Weight: about 130g

Package Weight: 185g

TB21S Product main functions

① Power input (5.5x2.1mm DC plug)

② Subwoofer

③ Right channel

④ Left channel

⑤ USB disk/USB sound card input

⑥ AUX input

⑦

Long pre: mode switching

Short pre: play / pause

Rotating: switching songs

⑧ Subwoofer volume/ba

⑨ Left and right channel Alto

⑩ Left and right channel

⑪ Total volume/switch

*Built in subwoofer frequency adjustment potentiometer.

high end experience

① Increase the high-end experience of rotary ,  which is convenient and fast without switching up and down songs and modes by mobile phone.

② Subwoofer

③ Midrange

④

The stereo adds midrange adjustment, the adjustment range of subwoofer, midrange and sound effects is fully covered, the human voice is prominent, and the sound is more transparent.

TB21S Product details

① Built in subwoofer frequency adjustment to avoid frequency change

② AUX IN:

AUX intelligent noise elimination proceing reduces the bottom noise problem caused by audio line interference, and adds aux expansion interface, which is easier to match and refit

③ AUX outgoing interface

④ USB IN:

Add USB flash disk interface, rotate to cut songs freely, and app supports USB flash disk song selection and song playing display

Installation example of external （Same as other products）

① Example of base welding

② base

③ 2.4G

④ Example of welding

Note: The and base should be purchased by yourself.

TB21S Installation Diagram （The installation method of other products is the same）

① M2*3 screw

② Upper cover board

③ Knob

④ M2*16 copper pillar

⑤ M2*3+3 copper pillar

⑥ M2*3 screw

⑦ Lower cover board

⑧

⑨ Free screwdriver and terminal

Wuzhi Audio APP Sleeping Music

Lullaby music allows you to return to nature, help you sleep, decompre and heal your body and mind. Wuzhi Audio APP has the function of regular shutdown.

10 natural sounds are Sound bowl, Stream, Wave, Sea wave, Thunderstorm, Bird song, Cry of insects, Frogs, Bonfire, Guqin, up to 1023 sound combinations.

10 kinds of natural sounds create unique natural sound scenes, create a natural atmosphere, quickly calm your mood and realize deep sleep.

Wuzhi Audio APP Function

Change name:

The name of each product can be changed, and multle products can be easily identified.

Change paword:

The connection paword can be modified to prevent others from hijacking.

This function can be turned off.

Adjust the volume of prompt tone:

The volume of prompt tone can be adjusted to meet different needs of customers.

ON / OFF prompt tone:

The prompt tone can be turned on or off.

USB flash disk playlist function:

Open the playlist of USB flash disk, select music at will, and support shaking to switch songs.

Wuzhi Audio APP Sound Function

Wuzhi Audio APP has popular, claical, jazz, country, natural, rock and other sound effects. It supports custom 10 segment sound effects and arbitrary adjustment to make up for deficiencies, so that different speakers can achieve better sound effects.

Claic mechanical volume knob

Turn the knob to switch the machine on and off, no need to pre and wait to see the indicator light.

After power off, turns off and enters low power consumption mode.

Timele place of claic mechanical volume knob:

1.With volume scale, you can know the current volume. The digital tuning position is unknown. I don't know the current volume. I will be startled by the sudden loud volume when I turn on.

2.Turn it off when the volume is turned to the lowest, which is not easy to damage the speaker and power amplifier.

3.The mechanical switch turns off without long preing and waiting, which is convenient and fast.

4.The real steple tuning is not digital multi-stage grading adjustment.

APP Setting Interface

name modification steps:

[enter a new name] → [click set on] → [system automatic restart] → [cancel pairing of mobile with the name] → [find a new name and re pair]

paword setting steps:

Method 1:

[turn on paword switch] →Use default paword 1111

Method 2:

[turn on paword switch] → [enter paword] → [click the setting on] → [the system will restart automatically] → [cancel pairing, and you will be prompted to enter paword when connecting again]

About shping
Shping and Packaging All it will be double checked and well packed before sending.It will be dispatched within 2 business days after buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for e areas,it may take a little longer). 

Special Announcement:
Please fill in the correct and detailed consignee, address and phone number in the order. For fast and correct delivery.If you do not receive order within 30 working days,please feel free to contact Customer Service before leaving Negative and Neutral Feedback, we will do our best to help you resoe the problem.TaxNo, you will only pay what is quoted as total cost at checkout, no more. You are not expected to pay any additional duties or taxes. If you are asked by Customs or our logistic partner to pay duties, please contact our Customer Service .

Your 100% satisfaction is very ant to us
If the product is not on good condition, You can return this product within 14 working days, please contact customer service center before returning.FeedbackYour satisfaction is our first priorityIf you receive the order and it is in good condition,we would be grateful if you would leave us 5 star Positive Feedback for the transaction.