Probably because Pioneer has become a subsidiary of Onkyo, their first HiFi players, the XDP-100R and DP-X1, are very similar in terms of appearance and function, and can be called sibling models. The Pioneer XDP-100R also uses an aluminum alloy shell and Android 5.1 system, and the appearance design and ease of use are excellent. In terms of configuration, while both use ES9018K2M decoding DAC and SABRE 9601K amplifier chip, the Onkyo DP-X1 uses two each, while the Pioneer XDP-100R uses only one each. In addition, the DP-X1 also has an extra 2.5mm balance port than the XDP-100R, and the thrust is more sufficient, compared to the Pioneer XDP-100R, which is more suitable for low-impedance earbuds, and the low-frequency quality is also slightly inferior.