Whirlwind IMP2 Passive Single Channel Direct BoxBuilt rugged on the inside and outside, this is the world famous DI found in pro systems everywhere. The IMP 2 converts a line or instrument level unbalanced signal to a low impedance mic level balanced signal. Features include: 1 4 inch parallel wired in out jacks Ground Lift switch to help isolate hum and buzz Uses Whirlwind's TRHL transformer that's riveted, not glued, to the chassis It's the ideal direct box for anyone requiring professional