It shows you like it loud below 30Hz in movies. Swap it with PB-13 Ultra. If space is an issue, go for PC-13 Ultra.
Agreed, the TC stated he's not happy with it's output so he might as well go for something with more power. Swap it out for one of the Ultra subs.
Projector: Benq W1070 1080p 2D/3D Screen: 120" Elite fixed frame AVR: Onkyo TX-NR809 Mains: Klipsch RF-62ii x 2 Center: Klipsch RC-62ii Surrounds: Klipsch RS-42ii x 2 Subs: Dual Hsu VTF-15H's Sonos-Play 5 and Play 3 Sony Playstation 4 Microsoft Xbox One