MissingRemote.com Reviews the SB-4000 Subwoofer
"Bass reproduction is effortless. Impressing with its power, and nuance. Energy you can feel fills the room. Response is instantaneous, tight, and controlled but never overpowering. The build quality is flawless. Most importantly the SB-4000 provides clean, tight bass, oodles of headroom, and musicality that impresses with every type of content."