All Spark is an boost based on Classic A JFET design. Up to 17dB pure volume. The additional BASS and TREBLE control give you more flexibility in achieving your ultimate tone. It doesn't change the Characteristics of your equipment tone. Its ideal pedal If you want more thickness distortion, change the brightness of the tone, increase or decrease the low frequency, adding more overtones.
It is your best choice at the end of the effector's signal chain to avoid the loss of sound caused by an excessively long signal cable.