If you look at it from a ratio of $$ perspective. A mic is said $75-100. So on a $1000+ system that is 10% or less and fixing the low-end FR can give you a 50% improvement in sound SQ. That is a pretty small investment for the return.
Of course, my 50% improvement in SQ was just a random # but it can make a fairly substantial improvement getting the low end optimized.
HTPC, Sony 40es, 120" Silver Ticket, 7702mkii, Sunfire Amp 225w, JBL 590, JBL 520
PSA XS30, Seaton Submersive, 2 Um-18 8cf sealed, Outlaw Ultra x 12, Kappa Pro 18LF, BFM Tuba 60 horn, B&C 18TBW100 6cf 41hz, 34hz, 28hz tune
iNuke 3000 & 6000 DSP's, Crowson Motion Actuator