The published frequency response graph for the LFR1100As looks to roll off at about 40 Hz. Seems like they would like an assist from a pair of Axiom subs, no?
A good subwoofer - especially a pair of subs - will absolutely extend the bass. The question is will the listener find it to be an assist.
During listening tests here over the years, we have had a lot of fun playing sine waves and asking questions of the people listening to the sine waves, under blind conditions.
The first was playing a 40 Hz sine wave and asking what frequency most thought the sine wave was. We gave 16, 20, 25, 32, 40, 50 and 63 Hz as possible answers. Over 90 percent guessed 20 or 25 Hz. Not ONE guessed 40 Hz or higher.
40 Hz is pretty deep.
The next was finding people's sensitivity to bass under 30 Hz. Some people find that, even at levels below the mains, that the addition of a 20 Hz program material ability into the capability of the system made for "slower bass."
Others loved the tactile bass, and identified it as palpable, not slow. This is where preference comes into play.
Some people also loved adding a house curve to the bass - essentially an elevated response from typically 30 Hz and below.
Speaking objectively, a pair of LFR-1100's - or any full range loudspeaker, can get a much more linear response with a properly dialed in subwoofer. A pair of $40,000 Magico S-5's also roll off below 40 Hz, and are down 20 dB at 20 Hz as a sealed system.
Many people would find that the most expensive subwoofer available is detrimental to the bass delivered by the Magico, while others prefer it.
Objectively, you are correct, in terms of extension. But we still have that preference thing.
