@reubent -- I do not use a Sub with the Gen 4's. Bass is quite remarkable. They are in one of my listening rooms approximately 15' x 15'., , This review describes it much better than I could!
The Gen Four is nominally a bass-reflex design with a box tuning of 41Hz. However, the bass tuning referred to as dual-tuned, is patent-pending and unconventional. There are two internal chambers which are said to be damped differently with a proprietary method, proprietary connection, and special absorption material. The end result is a well damped bass range and in-room extension to nearly 41Hz, a remarkable accomplishment for a 6.5″ driver in a compact enclosure. I can’t recall another stand-mounted compact speaker in my experience that captured as much tonal authority as the Gen Four.
The bass range didn’t sound like that of a typical bass-reflex design. One of the first things you’re bound to notice about the Gen Four is that bass lines are uncommonly tight, and you’d be hard pressed to believe that it is actually a bass-reflex design. Bloated, tubby, plummy, and muddy are some of the pejorative adjectives that have been hurled at bass-reflex designs over the years. Well, none of them apply here. The bass range was precise and facilitated excellent pitch definition. Electric bass lines often lost in the mix were easily resolvable without any issues. Midbass dynamic punch was plenty adequate in my moderately sized listening room (13.5′ x 19′) though be forewarned that there are limits to what a 6.5″ woofer can dish out, and I would be concerned about pushing the woofer hard in a much larger room.
