The Whirlwind MultiDirector rackmountable 4-channel direct box converts an unbalanced line, instrument, or speaker signal to a low-impedance balanced level. The Whirlwind MultiDirector features 1/4" parallel wired in/out jacks, as well as a ground lift switch to help eliminate buzz and hum. A 30dB pad switch is also onboard to let you work with speaker-level signals, as well as line-level signals, and a very useful high-cut filter switch cuts down on amplifier noise when engaged. This 4-channel DI uses Whirlwind's TRHL-M transformer with a metal shield, so you know you'll get top-quality performance from the Whirlwind MultiDirector.