Type: SP-1 fully balanced pre-decoder(Support DSD decoding)
DAC decoding: AD1955 (2 slices)
Fully balanced digital volume chip: MUSES72320 (2 pieces)
Frequency response: 20Hz-75kHz(+1/-3dB)
Signal-to-noise ratio: > 105dB (A weighting)
Maximum analog output power: 2.0V XLR
Balanced analog output: XRL 1 group
Balanced analog input: XRL 1 group, cinema pass-through 1 group
Digital input terminal: 2 x optical S/PDIF, 1 x USB; 2 x coaxial COAX
USB receiver specification: USB2.0, 32bit/384KHz
DSD signal specifications: DSD 1bit/2.8MHz, DSD 1bit/5.6MHz
Audio sampling rate: 24bit/352.8kHz
Distortion: <0.08%(1KHz)
Separation: ≥80dB
Machine gain: 12dB
Power consumption: 55W
Full function remote control(All aluminum alloy SP1)
USB (DSD support): 44.1K-384K 32BIT / DSD64, DSD128, DSD256
**Coaxial and optical fiber do not support DSD
**In order to better support DSD direct solution, XMOS is set to ASIO Native output
Dimensions: 430mm x 84mm x 313mm(Width x height x depth)
Packing size: 517mm x 428mm x 133mm(Width x height x depth)
Net weight: 10kg
Gross weight: 12.5kg
This machine is a multifunctional independent three-in-one fully balanced preamplifier, supports cinema pass-through function, allowing HiFi/AV ??to switch at any time, can be used independently as a fully balanced preamplifier, or as a fully balanced DAC decoding It uses two 24BIT/192KHZ DAC conversion chips AD1955 to form a fully balanced pre-decoder. The AD-1955 decoder chip is a piece of audio enthusiasts that has long been popular with audio enthusiasts. Experts also recognized that the AD-1955 has higher performance and better sound quality than the AD-1853 decoder of the year. It is still difficult to surpass, and the sampling accuracy and quantization standard are as high as 24bti/192KHz. . Its dynamic range and signal-to-noise ratio indicators can reach an astonishing 126dB! In order to minimize the timing resolution of the digital data stream(timing resolution)This machine also specially selects high-stability crystal oscillators with extremely high stability and accuracy to ensure that the timing in the digital quantization, sampling, decoding and D/A conversion circuit is maintained from beginning to end. Consistent, making jitter distortion almost zero. It laid a solid foundation for the high fidelity of sound quality.
The two analog signals that have been decoded, shaped and amplified are fed separately and fed into two high-fidelity volume chips MUSES72320 for synchronous volume control. MUSES72320 is specially developed by New Japan Wireless. Electronic volume control of high-fidelity dual-channel high-quality HI-FI amplifier
Because the internal potentiometer adopts ladder resistance and MUSES highly integrated precise wiring and layout technology to ensure a wide dynamic range and high S/N ratio, it has the characteristics of ultra-low distortion rate and ultra-low output noise (S/N) . The signal-to-noise ratio of 137DB makes it almost completely without distortion. With the external performance index of OPA2134PA, the audiophile operational amplifier OPA2134PA, its volume control range can be from -111.5dB to +31.5dB, and the step fineness is 0.25 dB. The size change is extremely smooth. The biggest advantage is that it completely solves the problem of poor contact and adjustment noise caused by the unsolvable carbon brush wear caused by the traditional audio potentiometer due to the long use time. It is usually used in high-end high-fidelity HI-FI power amplifiers that have high requirements for sound quality.
Then its audio signal stream enters the balanced signal output circuit composed of 4 US BB company OPA2134PA, the total harmonic distortion of the operational amplifier is only 0.0003%, and the noise figure is only 10nV/Hz, and the gain bandwidth product is as high as 25MHz, and the conversion rate is as high as 25v/us, which is much better than the NE5532, the king of op amps of the year! It is used for the transmission of audio channel signals, which can greatly improve the sound quality of the signal. Actual use feels that the tone is neutral and warm, and it is very courageous. In particular, the performance of the human voice is sweet and natural, and it has a stimulating appeal. At the same time, it is very suitable for appreciation of classical music and string music. The sound field positioning is accurate and open, and the resolution and airiness are also the best choice. In particular, the mid-to-high frequency is crystal clear, and the low frequency is powerful and full of elasticity, which makes it hard to stop listening.