This product is an active DI box with direct interface/line isolator functionality. In addition to pure audio performance, it is designed with numerous practical features. The X2 is essentially two X1s housed in the same chassis, and their performance and operating characteristics are almost identical. Each channel's audio signal passes through a specially designed transformer, eliminating most ground loops and achieving complete galvanic isolation. It features a ground lift switch for each channel to suppress hum noise. Furthermore, it features a three-stage high-pass filter, allowing you to cut low frequencies at two points. At 80Hz, it suppresses low-frequency beats, and at 240Hz, it isolates the low frequencies in the mix, creating space for the low frequencies of other instruments. [SPEC] Power supply: 48V phantom power (required per channel) Current consumption: 5mA @ +48VDC Dimensions: L 93mm x W 107mm x H 39mm Maximum input level: +20.5dBu Maximum output level: +0.5dBu Gain relative to input: -20dB Input impedance: 2MΩ Output impedance: 100Ω +/- 0.5dB, 10Hz - 80kHz (13.6K load, HPF off) Extremely low distortion, flat and wide frequency response.