The LM-2 suppresses the peak of the input signal, retaining a certain dynamic range. Adopting a high quality VCA , the LM-2 allows little tone quality deterioration and low noise. The high-speed envelope detecting circuits enable natural limiting effect. With the use of the Tone Control, the Limiter can create a wide variety of sounds. The limiter was mainly used by bass players and this is why all later limiters have been bass effects.

Specifications

Controls: Level, Tone, Release, Threshold
Connectors: Input, Output, AC Adaptor
Current Draw: 12 mA (DC 9V)
Weight: 400g/0.88 lbs.
Input Impedance: 1Mohm
Residual Noise Level: Less than -100dBm (IHF-A)
Recommended Load Impedance: 10kOhm or greater
Recommended AC Adaptor: ACA Series

http://www.bossarea.com/boss-lm-2-limiter/