Description: The TAS5613 is a high performance analog input Class D amplifier with integrated closed loop feedback. 1. Using original TAS5613, TL072 2. Bluetooth module uses Qualcomm QCC3003 Bluetooth 5.0 module 3. Bluetooth DAC decoder chip uses Texas Instruments PCM5102A 4. The resistor uses precision patch to ensure a good signal-to-noise ratio of the whole machine. 5. The PCB adopts 1.6mm thick double-sided sheet, 2.0 oz copper thickness, and the whole process of tin-spraying ensures the good passing performance of the current. 6. Fully enclosed dustproof potentiometer, the performance is more stable than the general potentiometer 7. Use high-current inductors for red and gray audio to ensure strong sound 8. Adopt all-aluminum chassis, the surface of the chassis is completely treated by oxidation coloring process 9. The way to connect to Bluetooth is the same as that of a normal device. 10. Input method: analog and Bluetooth input function. When two modes are input at the same time, the Bluetooth input is prioritized. After the Bluetooth connection, the RCA input is automatically disconnected; when the analog input is required, please turn off the Bluetooth function of the mobile phone before switching. Specification: Channel: 2.1 Working method: Class D Quiescent current: 65mA Work efficiency: 88% Output power: 4 ohm speaker, 150W+75W（at this time THD+N>=10%） Frequency response: 20Hz to 20KHz Dynamic range: >100 dB Signal to noise ratio: 100dB (A-Weighted) Load range: 4-8 Ω Working voltage: DC24V-36V (input connector: 2.5MM outside 2.5MM*) Potentiometer function: from left to right Bass adjustment, treble adjustment, volume adjustment Size: 180*100*40mm Package Includes: 1 Set Digital Power Amplifier (Power Adapter Excluded）