This is an active DI box for 2-channel use. It sends signals from instruments, line-level devices, speakers, etc., to equipment with balanced inputs, such as mixers. High-impedance input signals pass through a buffer circuit and are converted to balanced low-impedance signals by a low-noise active circuit. It has a flat and wide frequency response and can handle high signal levels. With its clean, uncolored sound, it can handle various sound sources and performs well even in noisy environments. It is highly functional and versatile, equipped with an attenuator, ground lift, phase inversion, and a low-pass filter. Using this unit between a computer-based audio workstation and monitors can also help reduce digital noise. The active circuit operates on phantom power or a 9V battery. The 9V battery is convenient because it can be used even when there is no external power supply. A new battery will last for over 100 hours. 【Features】 Active specification Operates on both phantom power and 9V battery Converts high-impedance balanced/unbalanced inputs to 600Ω balanced outputs Input attenuator (0, -20, -40 dB) Low-pass filter switch Phase inversion switch Ground lift switch 1/4" TRS jacks (input, thru) XLR jacks (balanced output) Rugged case 【Specifications】 Frequency Response: 10 Hz - 100 kHz, ± 0.5 dB @ +0 dBu THD: <.05% (typical) Dynamic Range: >100 dB (typical) Channel Separation: > 80 dB (typical) Maximum Input Level: +4, +24, +44 dBu (depending on ATTENUATOR setting) Maximum Output Level: +6 dBu (battery), +14 dBu (phantom power) Input Jacks: 1/4" TRS balanced/unbalanced × 2, 470k Ω Thru Jacks: 1/4" TRS × 2 Output Jacks: XLR male balanced × 2, <600 Ω Input Attenuation Switch: 0, -20, -40 dB Power: 9V @ 7.5 mA (alkaline battery recommended), 18 - 48V DC @ 6.4 mA (phantom power, per channel) Dimensions: 51H × 127W × 146D mm Weight: 1.22 kg