Whirlwind LM2U and LM2B Stereo Line Matcher

The LM2U and LM2B are active two-channel level matchers for the join between consumer and professional equipment. Each unit carries XLR, TRS mini and RCA phono jacks with level controls, so whatever turns up on the day has somewhere to go.

The circuitry is quiet enough for the job to be invisible: distortion below 0.0015% at unity gain across the band, 40 dBv of total gain available, and a level pot spanning -40 to +40 dBv. Power comes from the included Whirlwind PS24 supply.

Type	Active two-channel line level matcher
Frequency response	20 Hz - 20 kHz at unity gain, +/-0.1 dBv
THD + noise	Less than 0.0015% 20 Hz - 20 kHz at unity gain
Dynamic range	95.7 dB at 0.1% THD
Total gain	40 dBv, level pot range -40 to +40 dBv
Maximum input / output level	+17 dBv
Input impedance	20 kohms balanced; output impedance 100 ohms unbalanced
Power	Whirlwind PS24 supply included