ZK-3002B 300W+300W Bluetooth-compatiable Amplifier Module
1.Description:
ZK-3002B is a DC 36V 48V 300W+300W HIFI Bluetooth 2.0 Amplifier Audio Module with Stereo which is perfect for DIY speakers and transponders. This module can receive Bluetooth music, as well as AUX and USB audio input.

This amplifier module is ideal for those who want to add a surround sound experience to their home theater, KTV, outdoor parties, and more. With its powerful 300W output and adjustable volume control, you can customize the sound according to your preference. It is also easy to install and use, allowing you to enjoy an immersive sound experience with minimal effort.

2.Features:
1>.Dual Stereo: It has a built-in TPA3225 amplifier chip and adopts the Bluetooth version 2.0 specification which can drive high power 300W*2 Stereo with aluminum heat sink with DC 18V-50V work voltage and more than 10A current.

2>.Bluetooth APP Control : It can not only be used as an ordinary Bluetooth receiver, but also use the special Bluetooth APP ‘ Wuzhi Audio ’ to Modify Bluetooth Name, ON/OFF Bluetooth Password, Modify Bluetooth Password, ON/OFF Prompt Voice, Adjust Volume for Prompt Voice.

3>.Bluetooth/AUX/USB Audio: It can not only receive music via Bluetooth, but also via AUX/USB to fit different needs. Users also can DIY modify the input LINE to decode audio signals from decoder.

4>.Protection Function : It has multiple protection mechanisms to ensure its safe operation with over-current protection, short-circuit protection, overheating protection, under-voltage protection. Recommended to use more than 10A current to get more clear, bright and high fidelity sound.

5>.Application: Perfect for home theaters, KTVs, outdoor parties, and more, this Bluetooth amplifier will improve sound quality and provide a surround sound experience. It is easy to install and use, allowing you to experience an immersive sound with minimal effort.

6>.Easy to use: It is equipped with an adjustable volume control, allowing users to customize the sound according to their preference. Furthermore, it also provides functions such as switching to the next music, playing/pausing music, and turning on/off the power.

3.Functions:
1>.Bluetooth APP Control
2>.Bluetooth/AUX/USB Audio Input
3>.300W+300W Dual Channel Stereo
4>.Modify Bluetooth Name and Password
5>.ON/OFF Bluetooth Password
6>.ON/OFF Prompt Voice
7>.Adjust Volume

4.Parameters:
1>.Work Voltage: DC 18V-50V
2>.Work Current: >10A
3>.Controller IC: TPA3225
4>.Unique function: WuZhi Audio APP control
5>.Channel: 2.0 channel stereo output
6>.Audio input type: Bluetooth/AUX/USB
7>.Audio output type: Left/Right
8>.Music file format: MP3/WMA/WAV/FLAC/APE
9>.Output Power(Max): 300Wat50V4ohm/160Wat50V8ohm
10>.Communication distance: 15meter(Max)
11>.Over temperature protection: Yes
12>.Over current protection: Yes
13>.Short circuit protection: Yes
14>.Under voltage protection: Yes
15>.Work Temperature: -20℃~85℃
16>.Work Humidity: 5%~95%RH
17>.Module Size(Installed): 147*72*37mm

5.Note:
1>.The power amplifier board should be placed as far away from the WIFI signal (router) as possible to avoid signal interference.
2>.The power supply voltage should be DC 18V-50V with more than 10A current. The module will be damaged if the input voltage is above 53V.
3>.It is recommended to use a working power supply of more than 36V.
4>.Avoid signal interference by not using excessively long wires.
5>.The audio input and power supply voltage/current must both be sufficient to ensure enough power output.
6>.The higher the power supply voltage, the greater the output power.
7>.The smaller the impedance of the speaker, the greater the output power. It is recommended to use 4ohm speakers.

6.Use steps:
1>.Using the wiring diagram, select the correct speakers to connect to the black terminal.
2>.Connect the power supply from the power socket and wait for the ‘ding dong’ prompt to indicate the module is ready for pairing.

3>.Activate Bluetooth on your phone.
4>.From the Bluetooth device list, select the ‘WuZhi Audio’ device.

5>.Once the device is selected, the module will prepare start playing music.
6>.Adjust the volume using the rotary potentiometer. Rotate the knob clockwise to increase the volume.

7>.Press the potentiometer once to play/pause the music.
8>.Press the potentiometer twice to switch to the next music.

9>.Press the potentiometer three times to switch to the previous music.
10>.Keep the potentiometer more than 3second can turn ON/OFF work status.

11>.Search/download/open APP ‘WuZhi Audio’ without register if need control by APP. Note: This app can be used directly without the need to register.
12>.Select the ‘+ add device’ at the top line to add device.

13>.Automatic Select and select devices WuZhi Audio’ or Modified Bluetooth name.
14>.User can reset name, enable/disable/set password, enable/disable Bluetooth prompt tone.