Yamamoto Sound Craft YDA-01B Vacuum tube output circuit DA converter
Product code: yda-01b-1Yamamoto Sound Craft YDA-01B Vacuum tube output circuit DA converter
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The music has passion and powerful expressiveness.
In search of the gentle and beautiful sound of vacuum tubes
Yamamoto Sound Craft YDA-01B is a DA converter that pursues the "gentle and beautiful sound of vacuum tubes" and uses Western Electric's high-performance pentode WE408A. It brings excitement, powerful expressive power, and emotional analog-like sound to digital sources that cannot be obtained with general equipment.
Thoroughly simple design that brings out the charm of WE Pentode
- Vacuum tube output circuit: Designed to use two WE408A pentodes. A resistor is loaded on the output of the DA converter IC, and it is directly connected to the input section of the vacuum tube, creating a single non-feedback amplifier with a single stage configuration.
- High purity circuit: The current to the screen grid, which greatly affects sound quality, is supplied through a constant current circuit using MOS FETs, improving the purity of the sound. The design policy of minimizing the number of elements simplifies the circuit and maximizes the purity of the sound.
Luxurious use of DA converter IC
PCM1794A monaural configuration: Adopts PCM1794A DA converter IC in monaural configuration. Out of the four output sections, only one output is used, and dummy resistors are added to the other terminals. Although this design may seem wasteful at first glance, it is based on the conclusion that the purity of sound is higher than parallel connection.
Thorough power supply measures andHigh-Fidelityparts
- Independent power circuit: A large-capacity toroidal transformer is used to separate analog and digital windings to prevent mutual interference. Furthermore, the digital section, analog section, and output circuit are made independent from each other, and an elaborate power supply circuit is adopted that supplies them from individual regulators.
- Highly reliable wiring materials: The wiring material is Teflon-insulated, silver-plated copper wire, which is extremely reliable and has excellent sound quality.
| Digital input terminal | 1 coaxial line (RCA) |
|---|---|
| Analog output terminal | 1 coaxial line (RCA) |
| output level | 4V/0dB |
| Vacuum tube used | WE408A x2 |
| Compatible frequency | 32~192kHz (automatic tracking) |
| sampling filter | 8x Oversampling Digital Filter |
| Frequency Response | 20~20kHz (±1dB) |
| S/N Ratio | 78dB (IHF-A weight) |
| Output Impedance | 2.6kΩ |
| Dimensions | 420(W) x 290(D) x 94(H) mm / 5.2kg |
Powerful Expression and Vacuum Tube Elegance
"The music has warmth and powerful expression."
Many users and critics point out that the YDA-01B brings something that typical digital devices lack:**"Warmth" and "Powerful Expression"**to the music. While leveraging the uniquely gentle and beautiful sound of the Western Electric 408A tube, it is also powerful, giving music a lively and emotionally engaging reproduction that is highly praised.
"Monophonic Design and Simple Circuitry That Unlock IC Potential"
Using the PCM1794A in a luxurious monophonic setup with a single output and reducing the number of components to the minimum with a simple, feedback-free amplifier design is highly valued for maximizing sound purity. This approach eliminates the coldness characteristic of digital sound and produces a warm and natural sound.
"Thorough Power Supply Measures and Circuit Purity"
Separating transformer windings for digital, analog, and output circuits and supplying them via individual regulators meticulously eliminates interference between circuits. Additionally, the use of reliable wiring materials such as Teflon insulation and silver-plated copper wires contributes to improved S/N ratio and sound purity.
