Just a quickie on these as they're hooked up to mediocre equipment to begin with, out on my patio. (a Yamaha HT receiver (model ??), and a Tosh 3950 as a source). Rigged with cheap IC's and 14awg run-of-the-mill multi-strand copper.
I'm really impressed with the C-3. Many times when you listen to the bookshelf version of a tower speaker (I have C-9's in my main system), what you hear is very different---not so much with the C-3. Sure, you don't have the room energizing bass, but the midrange and treble, and overall tonality is very close. I'd love to hook them up to the main system, but I'm just too damn lazy---I have a feeling they would really shine in that scenario.
The C-3's have a surprising amount of lower bass, and sound really cool when they "growl" for lack of a better word. They don't have the "hooty" sound sometimes associated with bookshelves that are attempting to reproduce bass they simply can't do, it's well controlled yet fairly deep. They handle high input easily without sounding compressed or edgy. Like the C-9, treble is a bit laid back--smooth, yet extended. Also like the C-9, they have alot of, well....."foundation." What I mean is, they have a drive and punch to them that really draws you in; especially with jazz and progressive rock. They remind me of Polk Monitor 10's in that regard.