Whirlwind IMP 2 Standard Direct BoxProduct description Converts a line or instrument level unbalanced signal to a low impedance mic level balanced signal. The IMP is an in line transformer that converts a line or instrument level unbalanced signal to a low impedance mic level balanced signal. While the Imp 2 (shown) is the ideal direct box for anyone requiring professional quality and durability in an economical package. Inexpensive direct box with a fantastic footprint and the sound