Placement and multiple subs is the way to start the project to correct the bass. Sub EQ can only fix a few things and is at the end of the fix it line for the most part. The panel mentioned by the OP are fine for higher bass frequencies but, it is the stuff under 80 Hz that require 1 ft or thicker traps that most of us don't want in our HT rooms. Pioneer Elite avr's have a nice standing wave correction feature that is very good IMHO.
Klipsch RF 7 based HT 7.4, Pioneer SC 35, Acurus 200 Five, Dayton 18 Ultimxa Dual Sub Cab(2), Dayton 18 Ultimax Large Vented Sub Cab (2), on Berhinger I Nuke DPS amps, Samsung BDP F 7500, Asus/My Book Live HPC 4 TB
Yaquin VK 2100 amp, McIntosh XR 5 speakers, Samsung BDP F 7500