frequency response - B&W vs. Monitor Audio


I currently have a pair of B&W 685s and I am considering replacing them with a pair of Monitor Audio BR2s. The MAs freq resp gets down to 42Hz; the B&Ws only get down to 49Hz. Is this an audible difference? I would be getting the MAs through a friend who has access to wholesale prices and I will not be able to audition the MAs.
2nd issue - I am considering high-passing my bookshelfs through an active crossover in a powered sub. This will cut out frequencies below 80Hz before the signal gets to the amp and the bookshelfs. If I do this, does it matter if I upgrade to the MAs? Their high end is 30kHz, the B&Ws high end is only 22kHz. Thanks.
realremo

Showing 2 responses by magfan

Don't forget the room and setup!
Also, when it comes to LF extension of above named, I see no tolerance and certainly no ref to quality of sound.
The 'demo' disc that came with my sub has an organ track with a 16 2/3 hz pedal tone.
The Saint-Saens Symphony #3 with Organ is awesome.
It'll rattle everything in house. You can see the warble in window reflections.

I believe the Bosendorf Imperial Grand goes 1 octave below A1. This instrument has 97 keys, not 88.

Careful!