All Ken Kreisel Subwoofers and Satellites are sealed design. While most speakers nowadays adopt the vented(bass-reflex) design to squeeze more bass out but at the same time makes the sound muddier and sloppier, KK speakers insist on using the sealed design to deliver the more accurate, punchier, and tighter sound.
Sealed design enables you to experience the clean and authoritative deep bass and ultra-fast transient response. Unlike the vented design, which may play fairly loud but boomy, Ken Kreisel speakers are well controlled. The more precise sound and faithful music reproduction are why Ken Kreisel speakers are loved by many professional musicians, audio engineers, and sound enthusiasts.
