For bass and guitar, the Boost COMP is a player-friendly pedal utilizing old school, all-analog, FET-based technology, which is inherently warmer, more transparent, and more musical than other methods. Independent Boost function delivers up to 21dB to increase the output level without adding more compression.
Demo of the Boost COMP with bass recorded direct can be found here: https://youtu.be/I7PtUACTL1M
Demo of the Boost COMP with guitar can be found here:
https://youtu.be/wBcmoPfh_HE
For more details: http://www.tech21nyc.com/products/effects/boostcomp.html