Thank you both, very useful to me. So, SP100R2 won't bring additional bass slam, just extension, right? I've heard the Classic 100 but I think the positioning in the room was unfortunate or maybe it was simply a bad room as the bass extension suffered considerably - full sounding down to about 40Hz and nothing below. The deep tympani on Dead Can Dance's "Yulunga" were basically non-existent, and I can hear them on my SP2/3R2's! So I cannot extrapolate much about the SP100R2's bass from that experience.
Adding subs to the Classic 1/2, for example, would require a pretty low crossover point, most likely below 60Hz, so I'm not sure how would this option yield better bass slam / impact?!
@triodelover1499: between my SP2/3R2 and my Harbeth M30.2 (now up for sale) I prefer the former. Warmer, more exuberant, joyful or friendly I would say, with better lit mids, nice highs, bigger sound and in most cases I prefer their acoustic timbres reproduction. The Harbeth's are more "serious", they wear a costume with an appropriate tie so to speak, have a bit of a bump around 100Hz and the classic BBC dip in the midrange, a very (objectively speaking, more) refined tweeter and their less extended bass is clearer, tighter and with good (better?) texture. I must admit that the M30.2 played the most astonishingly realistic string quartet I've ever heard, though, they are great with violin and cello.
Adding subs to the Classic 1/2, for example, would require a pretty low crossover point, most likely below 60Hz, so I'm not sure how would this option yield better bass slam / impact?!
@triodelover1499: between my SP2/3R2 and my Harbeth M30.2 (now up for sale) I prefer the former. Warmer, more exuberant, joyful or friendly I would say, with better lit mids, nice highs, bigger sound and in most cases I prefer their acoustic timbres reproduction. The Harbeth's are more "serious", they wear a costume with an appropriate tie so to speak, have a bit of a bump around 100Hz and the classic BBC dip in the midrange, a very (objectively speaking, more) refined tweeter and their less extended bass is clearer, tighter and with good (better?) texture. I must admit that the M30.2 played the most astonishingly realistic string quartet I've ever heard, though, they are great with violin and cello.

