@innaĀ ...One could call it/that 'cross-grading'; adaptation to a new set of variables.Ā Keep the TT, the cart(s), the CD, the streamer...whatever supplies ones' input....and, of course, an outstanding computer.
(I'm not a Mac fan, but to each....)
Driver development and variations on the theme have been underway for awhile now.Ā The LS50s' are addressing a number of the limitations of the 'radiating element' of a speaker, which has happened in the past.
The port is purported to have some novel features, but the design is still a 'polished' ducted port phase inverter cabinet.
Time and market will decide if it's a hit or a miss. ;)
The price is attractive for a 'high-end' smaller unit anyway...
(I'd opt for the sub, but that's just me....I like the 'tactile nature' of bass...)
Have you experienced them?Ā The +2 suggests a Yes...