DYKB 12AU7 Tube CSR8675 Bluetooth 5.0 Audio Receiver Board ES9018 Decoder DAC 12s Signal APTX AUX For 12v 24v Car Amplifier

Features: The CSR8675 is used for Bluetooth digital audio signal receiving, and the 12s digital signal is transmitted to the ESS9018 chip for decoding. The output analog audio signal is filtered by the dual op amp and then amplified by the 12AU7 tube.Support wireless Bluetooth 5.0 and AUX(default mode) analog audio input, automatic switching and Bluetooth with priority. The AUX signal is also amplified by the tube,, in other words, it can also be used as a tube preamp.Support LDAC protocol, support sampling rate up to 24bit/96KHz, far beyond the APTX-HD's 24-bit/48KHz. Lossless switching with relays will not have any effect on sound quality.DC single power supply(DC 12V-32V), multi-stage voltage regulator design. Bluetooth module, DAC chip, op amp chip are powered by independent power management chip, op amp with dual (+/-) 13V power supply, 12AU7 tube powered by 110V high voltage.Classic NE5532 op amp with the PSVANE 12AU7 tube, plug-in op amp socket and the tube socket, so that different styles of op amps and tubes can be used.Operation Tips and Notice1. DC input interface supporting 12V-32V(AC is banned). Red(+12V) is positive and Black(GND) is negative.2. AUX input interface. White(INL) is left channel and Black(GND) is audio ground, Red(INR) is right channel. Notice: audio ground cannot be connected in error.3. Audio output interface. White(L-OUT) is left channel and Black(GND) is audio ground, Red(R-OUT) is right channel. Notice: audio ground cannot be connected in error.4. Connect Bluetooth external antenna (2.4G). The module must add external antenna if installed in the metal machine case, otherwise the receiving distance will be reduced.  Package Contents 1*Tube Decoding Board(with power and audio cable)1*Antenna
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