TZT D5b Standard Version Bluetooth DAC USB DAC Dual ES9038Q2M Bluetooth 5.1 Receiver for LDAC APTXFeatures:- Transparent and natural sound; full sound quality- ES9038Q2M decoding chip: adopt the latest ES9038Q2M decoding scheme, with 32BIT/384KHZ DAC patent structure for Hyperstream. It also has time-domain jitter removal technology and 129dB of dynamic range and -120dB of distortion. ES9038Q2M is a rare high-performance level DAC chip in the industry today, with transparent sound quality, high density and rich details- 1.3" screen display: OLED high-definition wide-angle display can display the input signal channel, 255-section column volume bar and real-time display sample rate and digital filter mode- PCM: When PCM is input, there are 7 kinds of digital filter modes that can be adjusted, which are displayed in real time in the upper right corner- DSD: When DSD is input, the sampling rate of the audio source is displayed in real time- DOP: Support optical fiber, coaxial DOP input, optical fiber 64, coaxial 128- Signal Direct: Turn off the volume control, maintain the maximum level output, reduce signal interference, and make the sound more realistic- With dual ES9038Q2M, it has lower signal-to-noise ratio and harmonic distortion. The sound quality is purer, the level of detail and the sense of air are also improved- MCU software control: It adopts the single-chip microcontroller solution to optimize the performance of ES9038Q2M. Software-controlled and optimized breakouts for song cuts, fast-forwards, and sample rate changes. 7 adjustable digital filter modes; automatic identification Input sample rate noise cancellation technology- Output protection: Japanese relay is adopted, it will be closed with a delay when it is turned on; it will cut off the output immediately when it is turned off. Avoid the popping sound of startup and shutdown, thus protecting speakers from causing damage- Filter op amp: Compared with other passive RC structures, its active LPF and I/V conversion design is more conducive to improving the system's response speed to audio, resulting in lower signal distortion and better music dynamics- 3 Op amp: With reserved IC socket, users can replace them with new op amps with different music styles by simply plugging and unplugging- With remote control: power on/off, adjust volume, and switch input via the remote. It enables wireless playing from speakers without Bluetooth. Old-fashioned power amplifiers can also get rid of the shackles of cables and make digital music resources richer- It uses the QCC5125 Bluetooth 5.0 scheme that is newer than the 8675. For LDAC, aptx-Adaptive, aptX-HD, and AAC. Support 32bit 384kHz audio CD-level sound quality; super cost-effective- Multiple input: support USB, Bluetooth, optical fiber, coaxial input. With volume adjustment, it can be used as a preamp. Good sound quality and no delay. Reduce the secondary loss of sound quality compression, accurately reproduce the full audio bandwidth, HIFI-level high fidelity- Onboard USB TYPE C input supports 48KHz 16bit. At the same time, it reserves a plug-in interface to upgrade the USB digital interface. All systems are driver-free; plug and play, convenient and flexibleD5b (Standard Version):- Chip: Dual ES9038Q2M- Bluetooth: BT5.1 (QCC5125)- USB: on-board- Op amp: NE5532P x 3- External power supply: 12V DC (socket 5.5-2.1; positive inside and negative outside)- Input interface: Bluetooth 5.0 (QCC5125); optical, coaxial and USB (default onboard USB can be upgraded)- Output interface: RCA (output level 2Vrms)- Power consumption: 0.48W (standby <0.1W)- Bluetooth Specifications: for LDAC, aptX-Adaptive, aptx-HD, SBC and AAC- On-board USB specification: 44.1-48kHz/16bit- Coaxial specification: 44.1-386kHz/16-32bit; DSD64-DSD128/DOP- Optical fiber specification: 44.1-192kHz/16-24bit; DSD64/DOPInstruction for Use:Suitable for a variety of home audio and equipment to play music.Operating Procedures:1. Connect its AC adapter to the mains socket and connect the decoder;2. According to the type of audio interface, connect the Bluetooth DAC to your home audio;3. Press and hold the round button on the decoder's panel to power on, and its screen will display the real-time input channel;4. Short press the round button to switch between different input channels; long press the button to power off.Package Included:- 1 x DAC Decoder- 1 x Power Adapter- 1 x Antenna- 1 x Remote ControlNote:- Your phone should support the functions for LDAC and APTX.