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Whirlwind IMP 2 Direct Box

The IMP 2 is the passive direct box Whirlwind has been building for decades, and it turns up in racks and on stages everywhere. It converts an unbalanced line or instrument level signal to a low impedance, balanced mic level output using the company own TRHL transformer, so it needs no power and has nothing to fail mid-set.

A pair of parallel wired 1/4 inch jacks lets you feed an amp and the console at the same time, and a ground lift switch breaks the shield connection when a ground loop starts to hum. It is built rugged inside and out, which is why it stays in service for years.

TypePassive direct box
TransformerWhirlwind TRHL
Impedance ratio (input to output)133:1
Frequency response20 Hz - 20 kHz, +/-1 dB
Level change (input to output)-20 dB
Input1/4 in. parallel wired in / out jacks
OutputBalanced mic level XLR
Ground liftSwitchable
Whirlwind IMP 2 and IMP-JT Direct Box Overview