Yes. The Boogie eq has always been a sensitive beast and the controls all interact too.
Back in 1988, when I got my Bass 400, I actually stopped using it for a short while because I couldn't figure it out. After a while I decided to persevere and it paid off. It does take a while to get to grips with the way it all works but it soon becomes automatic - and very worthwhile.
Whenever I read a thread where people say it didn't sound right I remember how long it took me to get to grips with it. I have always maintained (and still do) that any Boogie amp is capable of producing exactly the sound you want. Whether or not you can find it is down to you!!