The “Crystal” is a transparent clean booster and attenuator.
There are many times when you want to increase the level of an electric guitar/bass without adding any extra distortion or coloration to the signal.
That’s where “Crystal” comes in. It is a non-truebypass transparent preamplifier that can make your guitar signal level louder up to +16db.
When it’s not in operation, a built-in buffer repairs your tone from cable impedance imbalances and restores your signal treble losses.
The “Crystal” is also smartly designed to have the possibility of attenuation(-db) of your path signal, which is many times useful during recordings or to avoid your amp’s preamplifier cranking up from a high gain distortion and adding more unwanted harmonics and distortion.