Does subwoofer + bookshelve=full range speaker?


I am sort of new to this hobby so this may seem like a dumb question.
I always wonder if add a good sub to a bookshelve speaker do you get a same performance as the large full range speaker.ie if you add a subwoofer( assuming a good one) to B&W 805 or Martin logan entry level model . do you get the same performace as N801 or prodigy or more because the subwoofer in many instance will go even deeper than the full range speaker?
if not why not?
a1126lin

Showing 1 response by tweak1

If your question supercedes B&W and ML, then I can tell you I am using Reference 3A MM de Capos with a SVSubwoofer- total retail $3200. I have owned Genesis Vs ($12K), Accoustat 2+2 and 3+3s, Chateau References (monitors) with dual Sunfire MK II subs ($6K+). The de Capos SV Sub combo is by far the best I have had. I will add a second sub for stereo. My room is 19X 31X 14.

If you are interested in trying this combo, my de Capos are for sale (see ad/auction). I am a dealer and getting their new "i" version.