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There are two versions of the machine:
Standard version:Op amp with JRC double-precision op amp NE5532+NE5534 op amp 2 each
Op amp upgrade version:Op amp paired with the U.S. National Semi LME49710 LME49720 op amp, 2 each
PCM1794 has a sampling rate of 24bit 192K, has a high resolution, a sense of speed and transparency, and the tri-band is commendable, especially the human voice, mellow and sweet, and it is a cost-effective chip. After 2 pieces of PCM1794 are connected in parallel, the dynamic range and signal-to-noise ratio are greatly improved, reaching 132dB. After paralleling, the output current is doubled, the sound density is enhanced, the human voice is obviously thick, the whole sound section is relatively balanced, durable, and low frequency It is also enhanced, because the signal-to-noise ratio is improved, so the background also appears cleaner.
Highlight 1:Dual-core PCM1794, the details, dynamics, and sound field are all very good
BrightPoint 2:The coaxial fiber input uses AK4118 demodulation, which is a higher grade than the common CS8416 WM8805 on the market, with low time base jitter and good compatibility, no popping, and easy transmission of 192K 24BIT data.
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Highlight 3:Using the National Semi-low distortion op amp LME49720 LME4970 for I/V and LPF low pass, the effect is better than OPA2604, the sound is transparent and delicate, and it is naturally bright. With a gold-plated IC seat, you can freely replace and upgrade the op amp
Highlight 4:The use of resistor-capacitor matching components and linear voltage regulator integration, so that the circuit performance is fully utilized, German red WIMA, Nikon signature version capacitors, ELNA gods, VIS non-inductive cylindrical resistors, etc.
Highlight 5:The all-aluminum alloy case with laser lettering is fashionable and durable.
Highlight 6:Excellent performance, but excellent price, because it is self-designed, even the chassis is made by ourselves. In addition to the cost advantage, there is no other store that has more than 10 distributors to sell together, and the profit is eaten by the agent. , So don’t use price to measure his quality.
The accessories of this machine include 1 power cord, excluding optical fiber, coaxial and audio cables, which need to be purchased separately.
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Dual-core PCM1794, let 1 PCM1794 to process 1 channel separately, not counting how little the sound quality is improved, it is a good improvement for the separation, the 2 DACs do not interfere with each other, so that the sound field and positioning are improved. very obvious
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At this time, the Beijing Green Cube sealed transformer has the characteristics of low magnetic leakage and rate, which is the basic guarantee for the sound of the whole machine. Next to it is the high-speed filter capacitor for Panasonic FC audio.
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