Big jump from 800Hz - but still does a nice job of scooping the Mids and add depth to your bottom End. Easy to use ,but does eat batteries if no pwr / supply. Priced well so go get one !! You will get that thunder low end with this pedal. I have a Fender 410 bass cab which was just ok! With the EQ pedal, its WOW !!!!
If you need to boost your low end, mids or highs its your man. You can adjust about everything with this pedal. The only problem with it, that its a bit noisy. With this it is guaranteed that you will cut through any mix. 7 band bass eq with an affordable price.