must be a lot of poor cabinet design with smaller than 15" speakers in them then. Commonly would it not be accurate to state that cabinets with 15" or larger drivers handle a low B string better? It may be plop but I'd wager most players wanting the Low B would also consider using 15" speaker as par for the course.
the blanket was more to do with the Original Post. As in the asked for Quick Fix I was not providing in any way
Notch Filter? No, thanks for the tip though. Generally I buy gear that is a nice color, is used by someone famous I like, or in this case, I had room on my pedal board