All home are different depending on construction, space, furnishing and a few other things. This will impact a subs performance in the basement. Multiple subs will greatly increase the FR for multiple seats, increase spl, decrease distortion, ect.
I am in a basement and when I moved from upstairs, I was shocked. I had to do several things to help the bass response in the room.
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