Warranty time: The board is guaranteed for 6 months, and the whole machine is guaranteed for 2 years There are 2 options, option B is
The latest high-performance + cost-effective solution, launched in 2021
You can use a mobile phone charger or a computer USB cable for power supply, which is very convenient. The whole machine is an all-aluminum alloy structure.
Support Apple, Huawei, Xiaomi, VIVO, OPOP, Lenovo and other mobile phones
Highlights:
1 The Bluetooth receiver is based on the new solution QCC5125, the true Bluetooth 5.1 module, supports ATTX HD 24BIT transmission and LDAC)
2 Dynamic boost circuit, which greatly improves the dynamics, details, and musicality of the output circuit
3 HIFI level operational amplifier output chip
4 Very good with resistance and capacitance, Nikon FW audio capacitors, Panasonic FC high-speed filtering, German red WIMA, Foxconn headphone jack and so on.
PCB size: 61X60MM
Machine size: 69*21*72MM
The "guardian angel" of Bluetooth-aptX® technology is born It re-encodes and decodes the audio to be transmitted, significantly reducing the bit rate, without affecting the sound quality, and without the delay of transmission, making the Bluetooth stereo listening experience a revolutionary leap. Therefore, with aptX, you can enjoy pure wireless audio with CD-level sound quality anytime, anywhere. At the same time through ES9023 (or PCM5102) decoding to further improve the sound quality and analysis
The advantage of ATPX HDaptX is that it can play 16-bit/44.1kHz audio in the way it transmits music. However, because aptX uses compression to reduce audio encoding delay, it can only bring "CD-like sound quality"
The emergence of aptX HD is related to the increase in the popularity of high-definition audio. It can support up to 24-bit audio, which means that we will be able to listen to music with better sound quality on wireless devices. Compared with the traditional aptX ratio of 352kbps, aptX HD is undoubtedly more advantageous to increase the bit rate to 576kbps.
In addition to home, cars can also be used
The following is the PCB of Scheme A:
The following is the B plan circuit board: