" As a general rule, stereo systems tend to be difficult to integrate with conventional sub woofers because, for the most part, sub woofers are generally not designed to match them, and therefore suit 5.1 systems only. The Epos ELS SUB is different and was conceived as a means of extending the frequency response of a small pair of bookshelf speakers, rather than just producing large outputs at one particular frequency, such as 60 Hz.
This may appear to contradict established principles, but Epos engineers have not limited themselves to only trying to produce a product that plays 'one note' sound. For that reason the ELS SUB is capable of extending low frequencies with a relatively flat response down to 20 Hz. This is most unusual and would normally be unheard of in conventional woofers, because apart from anything else their cabinets and amplifiers would rattle and buzz, due to the simple method of construction used."
"The n-SUB is designed to complement (...) or a pair of n-SATs as part of a stereo system where the owner does not have the room to accommodate a pair of floor-standing loudspeakers. Based around a 250mm long-throw driver and a powerful integral amplifier (housed in a separate compartment) the n-SUB provides facilities for great user-configurability, including, for example, completely different set-ups for music and movies. The n-SUB comes with a remote control for optimum ease-of-use. "
Va intreb : is this marketing bullshit only ????!
Daca cineva dintre voi a avut experiente cu astfel de subwoofere in camere de bloc obisnuite (15-20 mp)va rog sa postati .Personal, as fi interesat de o astfel de solutie de extindere a raspunsului pe bass, cu atit mai mult cu cit poate fi versatila in sensul a multiple reglaje in functie de raspunsul camerei si inregistrare.
) intra mereu in protectie la impuscaturi sau explozii, astfel ca vedeam un film si faceam in acelasi timp gimnastica aerobica sa-l scot din protectie. 
(de altfel ,nici sub-ul de la Naim nu e ieftin!)
Deci, un compromis...acceptabil 
).