The new Treble B gives power and a nice sparkle to every guitar. The booster also works excellent to give Tube-amps a great kick and will give vintage pickups a new sense of life and still stays very dynamic while doing so, so that countless clean and overdriven sounds can be regulated easily through the guitars volume pot. The extra “Range” control defines and adjusts frequencies that need to be boosted. This makes the TREBLE B very versatile and useful for any Guitar. BOOST: controls the output volume, RANGE: controls the cutoff frequency.