Whirlwind IMP 2 1-channel Passive Instrument Direct Box Inexpensive direct box with a fantastic footprint and the sound quality The IMP is an in-line transformer that converts a line or instrument level unbalanced signal to a low impedance mic level balanced signal Converts a line or instrument level unbalanced signal to a low impedance mic level balanced signal An ideal direct box for anyone requiring professional quality and durability in an economical package Uses Whirlwind's TRHL transformer that's riveted, not glued, to the chassis