Analog sub-octave bass, 4 pots, one for the sub level signal, to the level of direct signal and a tone signal by.
I especially appreciate the presence of these two tones, which are the reason why I turned to this pedal.
Simplistic configuration, no need to book.
As with any analog octave, one note at a time, preferring the middle of the handle, pick up from time to time (requires a clean game).
Sub octave convincing and transparent for my taste, very effective. The two tones used to actually forge a sound according to his need and not just an extra octave simply magnify the sound.
I use it for 4 months, it perfectly fits my needs. Previously I played on a Ampeg SCP-OCT, I have nothing else tested, it is just perfect my my use. It is expensive but it sounds, it works very well, it seems solid (but this time tell me). I would do this choice without hesitation.