Oh... I bet it is.
That's 30hz. Its a frequency you don't hear ALOT, but your speakers feel it. Some cabs don't even reproduce it well.
What cab and what kinda bass are you using.
( for me, I actually cut that frequency a bit to give my amp and cab "breathing room" as it uselessly uses up headroom and can fart out speakers that would otherwise rock!)
That's 30hz. Its a frequency you don't hear ALOT, but your speakers feel it. Some cabs don't even reproduce it well.
What cab and what kinda bass are you using.
( for me, I actually cut that frequency a bit to give my amp and cab "breathing room" as it uselessly uses up headroom and can fart out speakers that would otherwise rock!)