D3a Basic Version DAC Audio Decoder Dual PCM1794A Chip Supporting Coaxial and Optical Input

D3a Basic Version DAC Audio Decoder Dual PCM1794A Chip Supporting Coaxial and Optical Input

D3a (Basic Version):
- Chip: Dual PCM1794A
- Bluetooth: None (with coaxial and optical input)
- USB: None (User can install USB interface)
- Op amp: NE5532Px3

Attention:
- Electronic components are subject to periodic changes and will be replaced with components of the same quality.
- Pictures are for reference only, the electronic components will change without notice. Please refer to the actual product. Thank you for your understanding!

Structure:
- For Vishay: American wafer resistors
- Japanese relay: Addressing impact sound
- Pluggable op amp: Easy to replace op amps
- European thin-film capacitors: LPF output filtering
- Two PCM1794A decoding chips: Separate left and right channels
- Secondary voltage regulation circuit
- 3.5mm output interface: Supports low-resistance earbuds
- Intelligent software control chip: solve the blasting sound
- Low jitter receiver: Supports DSD input software decoding

Features:
- The sound is delicate and enduring. Balanced dynamics
- Inverted op amp is easy to replace
- Support optical and coaxial input
- With volume adjustment function, it can be used as a preamplifier
- PCM1794A chip: It has high sampling rate and resolution. Its sense of speed and transparency is very good, and the three-frequency sound is very commendable, especially the mellow and sweet vocals. This is a very cost-effective chip
- Audiophile components: The analog output circuit uses wafer resistors for Vishay
Sweden's film capacitor for RIFA helps to enrich the details of the sound and express it delicately. Electrolytic capacitors for Nichicon are used
- Screen display: Using a 1.2" IPS display, it can display the signal channel being input and the real-time sampling rate. Large viewing angle display allows users to master audio information from a distance
- Signal receiving: CT7302 receiver scheme is used. PCM 32BIT/384KHZ. PCM1794A supports the input of DSD and DOP. The CT7302 is a S/PDIF receiver, with lower jitter, compared with AK4118.
- High sampling rate: advanced digital input processing chip CT7302, input channel with power-down memory, low jitter, and high sampling rate
- MCU software control: The performance of PCM1794A is optimized by software control of single chip microcontroller solution. Power on/off through the panel button. The input signal is automatically recognized. Using broken sound elimination technology, it can solve the broken sound generated when the song is switched, fast forwarded, and the sampling rate is changed
- Filter op amp: Adopt active LPF and I/V conversion design. Compared with other passive resistance-capacitance structures, it is more conducive to improving the system's response speed to audio, making the signal distortion lower and the music dynamic more rapid and powerful
- 3pcs dual op amp: reserved IC seat. Through simple plug and play, you can replace them with op amp of different music styles
- High-quality power supply: Built-in true dual-source positive and negative voltage conversion design. Compared with other capacitor voltage divider structures, it is more conducive to improving the symmetry of positive and negative voltages, and making the PCM1794A decoding smoother
- Secondary voltage regulation: High-performance power purification circuit design reduces ripple interference caused by switching power supply, and provides clean power for DAC and LPF

Specifications:
- Size: 126 x 95 x 30mm/5 x 3.7 x 1.2" (LxWxT)
- Weight: 290g/0.6lb
- External power supply: 15V DC (jack 5.5-2.1)
- Input Interface: Coaxial and Optical
- Output interface: 3.5mm/RCA (output level 2Vrms)
- Power consumption: 0.48W (standby <0.1W)
- Coaxial specifications: 44.1-192kHz/16-24bit
- Fiber specification: 44.1-192kHz/16-24bit

Package Included:
- 1 x DAC Decoder

Note:
- Power adapter, antenna and remote control are not included.