It never hurts to play around with the crossover. Each room is different and each setup is different. The R5Bi’s only go down to around 60 Hz (57 Hz in my room before dropping off), so I use a crossover at 80 Hz, which suited my tastes just fine. I will say that when I used the R55Ti’s, its upper bass and lower midrange output was a bit more impressive, as they should be with three 6-1/2” drivers (I crossed those over at 60 Hz). But then again, I’m looking for as much from the speakers as I can get, and let the bass from the subwoofer cover what the speakers can’t deliver nearly as well.
There is only so much a 5-1/4” driver can deliver in the upper bass regions, so playing around with the crossover may help fill in what you feel is missing, as long as clarity doesn’t suffer (a real strong suit for the R5Bi’s).
Music area: Magnepan 3.6, McIntosh MC2205 amp & C48 preamp, SVS SB13-Ultra, Oppo BDP 95, dbx 3BX, and assorted equipment.
Movie area: EMP Tek E5Bi (were rebadged to R5Bi), RBH/EMP Tek R55Ti, PSA S3000i, Denon X2000, Oppo BDP 83.