ZK-TB21S TB21 MT21S MT21 2.1 2*50W+100W TPA3116D2 BT Audio Amplifier Power Subwoofer AMP Wuzhi Audio APP

The ZK-TB21 and ZK-MT21 products have been upgraded to APP versions, supporting Wuzhi Audio APP.

Wuzhi Audio APP download link:

http://www.qingdaowuzhi.cn/appdownload/Wuzhi_Audio.apk

For Apple iOS phones, please search for 'wuzhi audio' in the Apple App Store to download and install.

Before, the left and right s 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 yours, 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 equipment.

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

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

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

ZK-TB21Sis an upgraded version of ZK-TB21. It adopts TPA3116D2 power amplifier chip and BT 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 / BT / USB sound source switching selection.AUX external lead XH2.54-3P socket is added.The subwoofer frequency adjustment is changed to internal board debuing. After debuing, the customer will not change at will. BT input + AUX input + USB f disk input + USB sound card input, support Wuzhi Audio APP.

ZK-TB21also adopts TPA3116D2 power amplifier chip, BT version 5.0, BT input + AUX input.

ZK-MT21Sis an upgraded version of ZK-MT21. It adopts Chinese power amplifier chip and BT 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 / BT / USB sound source switching selection. The subwoofer frequency adjustment is changed to internal board debuing. After debuing, the customer will not change at will. BT input + AUX input + USB f disk input + USB sound card input, support Wuzhi Audio APP.

ZK-MT21adopts Chinese power amplifier chip, BT version 5.0, BT input + AUX input.

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 BT name of each product. Set the BT connection paword. You can adjust the volume of the prompt tone. The switch prompt tone can be turned on or off. USB f disk playlist function, open USB f disk playlist, select music at will, and support shaking to switch songs. Support customized 10 segment sound effects and arbiry adjustment to e up for deficiencies, so that different speakers can achieve better sound effects.

Model：ZK-TB21S

Brand: Wuzhi Audio

Product Name: 2.1 BT 5.1 power amplifier module

Product Model: ZK-TB21S

Amplifier Chip: TPA3116D2

s: 2.1 (left + right + subwoofer)

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

BT 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 s 20-50W, 4-8Ω

Subwoofer 20-100W, 3-8Ω

Output power:

R&L ≤50W

Subwoofer≤100W

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

Product Size: 119*100*22mm

Product Weight: about 196g

Package Weight: about 248g

Model：ZK-TB21

ZK-TB21 product upgrade, supporting Wuzhi Audio APP.

Brand: Wuzhi Audio

Product Name: 2.1 TPA3116D2 BT dial power amplifier module with Tone

Product Model: ZK-TB21

BT Version: 5.0

Input Sensitivity: 500mV

Audio Input: AUX + BT5.0

s: 2.1

Chip Solution: TPA3116D2

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

Adapter Speaker: 20W~100W, 4~8Ω

Output Power:

Max50W @ R&L

Max100W @ subwoofer

Working Type: Cla D

DC socket: 5.5*2.1mm

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

Product Size: 118mm*100mm*22mm

Product Weight: about 195g

Package Weight: 256g

Model：ZK-MT21S

Brand: Wuzhi Audio

Product Name: 2.1 BT audio power amplifier board module

Product Model: ZK-MT21S

Amplifier Chip: Chinese chip

s: 2.1 (left + right + subwoofer)

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

BT 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 s 20-50W, 4-8Ω

Subwoofer 20-100W, 4-8Ω

Output power:

R&L ≤50W

Subwoofer≤100W

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

Product Size: 93*96*22mm

Product Weight: about 136g

Package Weight: about 187g

Model：ZK-MT21

ZK-MT21 product upgrade, supporting Wuzhi Audio APP, with timed shutdown function, sleep function, and sound effect function. You can modify the BT name, modify the BT paword, and adjust the size of the prompt tone. The prompt tone can be turned on or off.

Brand: Wuzhi Audio

Product Name: 2.1 BT audio power amplifier module

Product Model: ZK-MT21

BT Version: 5.0

Input Sensitivity: 500mV

Audio Input: AUX + BT 5.0

s: 2.1

Chip Solution: Chinese chip

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

Max 100W @ subwoofer

DC socket: 5.5*2.1mm

Protection Mechanism: against re 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

④ Left

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 Alto

⑩ Left and right

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 nsparent.

TB21S Product details

① Built in subwoofer frequency adjustment to avoid random 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 f disk interface, rotate to cut songs freely, and app supports USB f 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 yours.

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 ar

⑤ M2*3+3 copper ar

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 BT name:

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

Change BT paword:

The BT connection paword can be modified to prevent others from hiing.

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 f disk playlist function(ZK-MT21 does not have this function):

Open the playlist of USB f 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 arbiry adjustment to e 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, BT turns off and enters low power consumption mode.

Timele p of claic mechanical volume knob:

1.With volume scale, you can know the current volume. The dial 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 dial multi-stage grading adjustment.

APP Setting Interface

BT name modification steps:

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

BT paword setting steps:

Method 1:

[turn on BT paword switch] →Use default paword 1111

Method 2:

[turn on BT 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]