502M 502H 1002M 50W*2 100W*2 TPA3116D2 Dial Audio Power Amplifier Board Stereo BT5.0 USB Mini AMP AUX Wuzhi Audio USB

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.

The power supply can not be connected to the 24V battery pack. (The actual maximum voltage of 24V battery is about 28V)

Tip: To have enough output power if the audio input is sufficient and the supply voltage/current is sufficient. The power supply voltage is higher and the relative power will be larger. The speakers with different impedances will have different output power. In the case of sufficient voltage and current, the larger the s of the horn, the smaller the relative sound power. Please pay attention!

Product comparison table

Model

502M

502H

1002M

Picture

Feature

1.Chinese chip .

2.Unfiltered,standard

sound quality.

1.TPA3116D2 chip.

2.With filter，high performance

filter, sound quality.

1.Chinese chip .

2.Unfiltered, general

filter, high quality sound quality.

Audio input

BT+AUX+USB f disk + Computer

USB

BT+AUX+USB f disk + Computer USB

BT+AUX+USB f disk + Computer USB

Power

50W+50W

50W+50W

100W+100W

Heat sink

20*18*10mm Heat sink

20*18*10mm Heat sink

36*25*10mm Heat sink

Power supply

DC5-24V

DC9-24V

DC5-24V

Speaker

10~100W,4~8Ω

10~100W,4~8Ω

20~200W,4~8Ω

Protection

Overheat,

Over current,

Short circuit protection

Overvoltage,

Undervoltage,

Overheating,

DC ,

Short circuit protection

Overheat,

Over current,

Short circuit protection

Product size

60*60*29mm

60*60*29mm

60*60*29mm

Package weight

about 96g

about 104g

about 104g

Model:ZK-502M

502M Specification s

Brand: Wuzhi Audio

Product Name: Mini 50W*2 BT 5.0 power amplifier module

Product Model: ZK-502M

Chip Model: Chinese amplifier chip

Audio Input: AUX + BT+USB f disk + Computer USB (plug and play)

Power Supply: DC5~24V (high power recommended high voltage)

Adapter Speaker: 10~100W, 4~8Ω

s: left and right stereo (stereo)

BT Version: 5.0 (>15 meters without occlusion)

BT Name: Wuzhi Audio

Protection Mechanism: Overheat, Over current, Short circuit protection

Power supply voltage:

12V-----8Ω/12W+12W,4Ω/20W+20W

15V-----8Ω/18W+18W,4Ω/30W+30W

19V-----8Ω/30W+30W,4Ω/40W+40W

24V-----8Ω/40W+40W,4Ω/50W+50W

Product Size: 60mm*60mm*29mm

Product Weight: about 60g

Package Weight: about 96g

502M Product Wiring Diagram

① Chinese amplifier chip

② USB f disk or computer USB input

③ BT input

④ Audio input

⑤ Switch

⑥ Volume

⑦ Power input (5.5x2.1 DC plug)

⑧ Right (Connected to paive speaker)

⑨ Left (Connected to paive speaker)

⑩ Audio output (Connected to active speaker)

Note: Paive speakers and active speakers can only choose one.USB f drive file system must be FAT32, maximum support 32GB.

502M Installation Diagram

① Key cap

② Knob

③ 20*18*10mm heat sink

④ M2*12 copper ar

⑤ M2*7 screw

⑥ Upper cover board

⑦

⑧ Lower cover board

502M Product Size

502M Packing list

Model:ZK-502H

502H Specification s

Product Name: 50W*2 BT 5.0 power amplifier module

Product Model: ZK-502H

Chip Model: TPA3116D2 amplifier chip（with AM interference suppreion）

Audio Input: AUX + BT + USB f disk + Computer USB sound card (plug and play)

Power Supply: DC9~24V (high power recommended high voltage)

Adapter Speaker: 10~100W, 4~8Ω

s: left and right stereo (stereo)

BT Version: 5.0 (>15 meters without occlusion)

BT Name: Wuzhi Audio

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

Power supply voltage:

12V-----8Ω/12W+12W, 4Ω/20W+20W

15V-----8Ω/18W+18W, 4Ω/30W+30W

19V-----8Ω/32W+32W, 4Ω/40W+40W

24V-----8Ω/38W+38W, 4Ω/50W+50W

Product Size: 60mm*60mm*29mm

Product Weight: about 68g

Package Weight: about104g

502H Product Wiring Diagram

① TPA3116D2 amplifier chip

② USB f disk or computer USB input

③ BT input

④ Audio input

⑤ Switch

⑥ Volume

⑦ Power input (5.5x2.1 DC plug)

⑧ Right (Connected to paive speaker)

⑨ Left (Connected to paive speaker)

⑩ Audio output (Connected to active speaker)

Note: Paive speakers and active speakers can only choose one.USB f drive file system must be FAT32, maximum support 32GB

502H Product Size

502H Packing list

Model:ZK-1002M

1002M Specification s

Product Name: Mini 100W*2 BT 5.0 power amplifier module

Product Model: ZK-1002M

Chip Model: Chinese amplifier chip

Audio Input: AUX + BT+USB f disk + Computer USB (plug and play)

Power Supply: DC5~24V (high power recommended high voltage)

Adapter Speaker: 20~200W, 4~8Ω

s: left and right stereo (stereo)

BT Version: 5.0 (＞15 meters without occlusion)

BT Name: Wuzhi Audio

Protection Mechanism: Overheat, Over current, short circuit protection

Power supply voltage:

12V-----8Ω/20W+20W, 4Ω/40W+40W

15V-----8Ω/35W+35W, 4Ω/60W+60W

19V-----8Ω/55W+55W, 4Ω/80W+80W

24V-----8Ω/70W+70W, 4Ω/100W+100W

Product Size: 60mm*60mm*29mm

Product Weight: about 66g

Package Weight: about 104g

1002M Product Wiring Diagram

① Chinese amplifier chip

② USB f disk or computer USB input

③ BT input

④ Audio input

⑤ Switch

⑥ Volume

⑦ Power input (5.5x2.1 DC plug)

⑧ Right (Connected to paive speaker)

⑨ Left (Connected to paive speaker)

⑩ Audio output (Connected to active speaker)

Note: Paive speakers and active speakers can only choose one.USB f drive file system must be FAT32, maximum support 32GB.

1002M Product Size

1002M Packing list

Question and answer

1. How to choose a power supply？

The power supply for the module is critical. The power supply requires small output ripple and low internal resistance. The higher the voltage, the higher the current and the better the output power. If you only have 12V 2A(502H and 502M:12V 1A), you can bring a 3-4 inch speaker. If you are 19V 5A or above, there is no problem with 8-10 inches, and the power supply must be highly valued. If the voltage is too low, the sound will be distorted after the sound is amplified. If the current is too small, the speaker will pull the voltage low, work abnormally or the sound quality will deteriorate.

It is recommended to use 18V19V24V power supply with current above 3A. If you only have 9V12V or 1A 2A power supply, it can also be used but the power is small. Please pay attention to the maximum volume when using it, which may affect the sound quality.

2. How to choose a speaker?

The commonly used horn is usually 4 or 8 . If your speaker power is small, it may be used between 20W-50W(502H and 502M:10W-30W). The power supply voltage is small to prevent the amplifier from ing out after ing. For example, select a power supply below 15V.If you are a 50W-200W(502H and 502M:50W-100W)speaker, don't worry about the speaker out. You can choose 12-24V power supply. The higher the voltage you choose, the louder the output sound or power. The speaker power is not recommended to exceed 100W, otherwise the sound quality will be affected.

3. How to choose BT or AUX audio input mode?

This audio amplifier module follows the prince of hardware connection first. A succeful USB connection is in USB mode, and AUX insertion is in AUX mode. If the USB is not connected and AUX is not plued in, it is in BT mode, which supports automatic reconnection. Mode tole with mode prompt. When choosing USB audio input mode, it is ant to note that USB can directly connect to the computer and other devices with USB audio output without installing a driver. USB input is lole input, good sound quality, no interference, no noise.

4. When the sound becomes louder, the phenomenon of turbid sound appears.

The sound is distorted. Please change the adapter power supply with a higher voltage rating.

5. After the sound becomes louder, the sound is stuck.

The input power is insufficient, and the power supply its is intermittently powered off. Please rep the power supply with a larger power. Or the output power is too large, the power amplifier board is seriously heated, and thermal protection occurs, reducing power usage or enhancing heat diipation.