Check out this awesome, highres review from Brazil; Victor Hugo Targino playing and Italo Brito as producer! Really shows all it can do.
Demos of the original Grombass from users around the world
Demo from DC Gear review of the original Grombass
Kristian Sveholm(Bass, Karpe Diem): -jump to 1:10 to hear the effect!
“The Grombass pedal is one of the most important pedals I’ve ever bought! People do not realize what hit them in the face, but they notice it! I’ve used the pedal on two full tours without problems. The nice thing with the Grombass is that it manages to distort the sound perfect without loosing heat at the bottom. No other distortion basspedals can do that in that way. It also has an incredibly cool character, which I have not heard on anyone else. The pedal is used on a range of tracks where I want more punch and is completely indispensable on “Toyota’n to Magdi”
One of the first demos made with the Grombass. Anders Bitustøyl played his Fender.