12-24V беспроводной цифровой аудио усилитель приемника BT 4 2 доска для наушников двухканальный 50 Вт + мини-модуль

Product Characteristics:
Both AC and DC universal
USB audio decoding: support for WMA, MP3, WAV, FLAC lossless music file formats
External voice input (mobile phone, computer, MP3, DVD, etc.)
Radio FM multi band radio receiver
Automatic switching of play mode
Voice prompt
Multi state indicator lamp
 
Specifications:
Color: Black
Material: Acrylic + PCB FR4
Supply Voltage: DC12-24V / AC8-16V
Output Power: 50W*2
Output Load: 4-8Ω
Frequency Range: 14-100KHZ
Signal to Noise Ratio: 100dB
Number of Vocal Tract: Double Channel Stereo
Switching Frequency: 1.2MHz
Wireless Transmission: Transmission Distance≥10 meters, using the latest BT 4.2 protocol
Rotary Knob Height: 17mm / 0.7in
Plastic Antenna Length: 40mm / 1.6in
Retractable Antenna Length: 80~240mm / 3.1~9.4in
Item Size: 118 * 84 * 45mm / 4.6 * 3.3 * 1.8in
Item Weight: 246g / 8.7oz
Package Size: 18 * 12 * 5cm / 7.1 * 4.7 * 2.0in
Package Weight: 258g / 9.1oz

Note:
1. Sufficient power supply is recommended. The current must be large enough, otherwise the power of amplifier and horn can not be used.
2. Please control the appropriate volume of the small power horn, with the appropriate horn and box, the sound effect will be better.
3. There is a fever phenomenon in the use of digital power amplifier, and the heat dissipation can be strengthened.
4. The use of 4. chip super power will cause sound stuck, which is the protection function of the circuit. It belongs to normal. 
 
Package List:
1 * BT Power Amplifier Board
1 * Acrylic Protective Shell