PJ.MIAOLAI A2 ESS9023 bluetooth 5.0 HIFI Lossless 6N3 Vacuum Tube Preamp Amplifier DAC

Features Various audio input can be connect to PC directly as a high grade USB external sound card and can be wired to CD player lossless audio source and can wirelessly connect to smart phone by bluetooth very convenientExcellent sound quality using classic 6N3 tube warm and charming tone very balanced clear and delicate sound dynamicallyWith Treble and Bass Function users can adjust freely according to different parameters of their own speaker device to achieve ideal HiFi sound qualityHigh end Materialbluetooth 5 0 module using QCC3003 chip supporting A2DP AVRCP HFP AAC 12S and so on 16M SPI FLASH storage chip lossless decoding transmission with farther distance more stable speedbluetooth decoding using the latest US ES9023 Hyperstream architecture and time domain jitter cancellation technology enable jitter free recording quality with a dynamic range of 112 decibelsUSB sound card using BB PCM2704 the sound quality output is warm and the sound field is openAudio Input USB PC 3 5mm Stereo Wireless bluetooth 5 0Audio Output RCAPower Supply DC 12V adapter is equipped and global universal bluetooth Chip QCC3003 ES9023USB Chip US BB PCM2704PCM2704 ParametersDistortion THD N 0 006 RL10k Distortion THD N 0 025 RL 32 SNR 99 decibelsDynamic range 99 dBSupport sampling rate 16Bit 32k 44 1k 48kDimensions 138 x 116 x 32mmNotice The vacuum tube needs 5 7 seconds to warm upChoose audio input by hand Clockwise rotation to switch diffe