Bluetooth amplifier board

When powered on without any external audio devices connected, this product defaults to Bluetooth mode. If external devices like an AUX cable or USB flash drive are connected, it will default to AUX or USB mode. The device prioritizes the most recently connected device during playback, so if you plug in an AUX while playing over Bluetooth, it will switch to AUX immediately. The same goes for USB – if you insert a USB flash drive, it switches to USB playback right away. You can also switch audio modes using an app, which is very convenient.

1) For AUX playback, it’s best to use an AUX cable with a screen layer to reduce noise. If you're using it with a desktop computer, it's better to use the AUX output on the back of the computer's main unit, as the front AUX port might have noise.

2) For USB playback, try to use MP3 format. If using WAV format, the sample rate must be within 44100Hz, as higher rates might not play correctly.

3) To use the USB sound card function, just connect it to your computer with a USB data cable. No need to install any drivers – most computer systems will switch to the USB sound card by default. If not, you can manually select it.

Power Supply

This product supports a power range of 5-26VDC and is compatible with standard 5.5-2.1/2.5 power adapter plugs. It is recommended to use a 12V or 24V standard power adapter with an output current of over 10A. The power size should match the speaker’s power: if using a 2Ω/100W speaker, the power should not exceed 20V; for a 4Ω/50W speaker, the power should not exceed 21V; and for an 8Ω/50W speaker, the power should not exceed 24V.

SHC Electronics Limited was founded in 2017 as a high-tech enterprise, specializing in the manufacturing of intelligent controller PCBA, as well as the research, design, and production of intelligent products. We focuses on providing various intelligent controller products and corresponding solutions for industrial controllers, medical products, new energy vehicle electronics, and new smart home applications.

Our factory has obtained certifications such as ISO 9001:2015, ISO 1345:2016, IATF 16949 for automotive, and ISO 13485 for medical quality system certifications. We have the capability to assist customers in completing RoHS and Reach environmental certifications, as well as supporting them in product reliability testing and failure analysis.

Distinguishing itself from factories focused solely on manufacturing, SHC Electronics Limited also provides services such as PCBA design and development, BOM material procurement, DFX evaluation, and other technical support. From the research and development stage to prototyping, small to medium-scale production, and mass production, we provide corresponding manufacturing solutions.

During the product design stage: we can assist with material selection and assist with DFX design, assist with designing the original schematic diagram and Layout design, and the design of test plans. During the sample verification stage, we can provide 10-day fast prototyping, including PCB manufacture, material procurement, and SMT assembly. During the mass production stage, we can assist with mass procurement cost reduction, assist with capacity ramp-up, throughput yield improvement, process failure analysis, verification of key processes, and verification of process parameters.