Why would you add a MaxTrap or FullTrap to the kit if they already have bass absorbers?
The MaxTrap and FullTrap present more advanced and higher performance solutions that include an extra thick absorptive panel, wood enclosure that creates a semi-contained air trap and a resonating or floating membrane that takes out deep bass. All of this costs more money and for many, the added bass control may not be needed. It really depends on how critical your engineering skills are and the level of production you intend to produce from your room. All small rooms suffer from excessive bass! You have to decide how much of it you want to control.
