The Bass Poison Ivy pedal is based on the sort of preamp you would find on a bass amplifier. The pedal buffers and splits the incoming signal, one half is distorted by the amount set by the Fuzz control which is then shaped by the Attack control. Attack is the mix between the fuzz and a further treble boosted fuzz. The two signal paths meet again at the Blend control allowing the original signal to be mixed with the distorted version. Finally, the overall level of the combined signals can be arrived at using the Volume control. This pedal has plenty in the tank and can give the bass guitar some subtle fuzz tones but still give you a nasty growl when you need it. This pedal was featured in 2018's Bass Magazine and this is what they said: Meanwhile, the Poison Ivy fuzz pedal offers fuzz tones from the subtle to the extreme, and everything in between. How you wish to drench your tone with fuzz is determined by the Blend control, and the fuzz tone itself is impressive, whether you play with a pick, fingerstyle or slap. 8/10