It is the reverb characteristics of the system/room. I cut my sub around 6 dbs for some music which control it very well. That bass hit can be annoying and may lead to hearing loss. I know we read so much about trying to get all the bass from the subs on this and other forums but more is not better all the time. Cut the dbs in the avr's since It can be moved back up with the remote easily. I don't rum my bass hot for music and only sometimes with movies..
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