Despite its simplicity the Art PDB4 4-Channel Passive Di-Box makes a great addition to your collection of audio equipment. This four-channel direct box features four quality transformers – which have all be isolated to prevent hum and buzz. Isolation is integral to providing maximum channel separation and therefore prevents noise. Meaning your signals stay totally clean. The interface is also exceptionally tough and the construction will ensure usability tour after tour. Simple but powerful interface Despite its streamlined design the Art PDB4 4-Channel Passive DI-Box benefits your live and studio audio setup. There are four fully isolated channels that provide clean smooth audio without hassle. And with this separated setup you easily eliminate ground loops. This box allows connecting different instruments to balanced inputs of mixer consoles. You can also patch in a music source to an amplifier whilst also sending it to a mixer. The incredibly tough construction means that your Direct Box can weather many years of tough gigging. Features Four fully isolated channels Switchable input attenuation (0dB -20dB -40dB) 50k ohm instrument/line input 50k ohm parallel link jack 600 ohm XLR output Jack switchable ground lift 1U 19-inch chassis Specifications Frequency Response: 10 Hz – 50 kHz +/- 0.5dB @ +4dBu Input Connections: 1/4-inch TS unbalanced Output Connections: XLR male balanced Input Impedance: 50k Ω Output Impedance: 600 Ω Ground Lift: Switchable Input Attenuation: Switchable (0dB -20dB -40dB) Chassis Type: All steel black finish Power Requirements: None Totally Passive Dimensions: 1.75″ x 19″ x 6″ (44.5mm x 483mm x 152mm) Weight: 6.5 lbs. (2.95 kg)