I think all of the sound is - sorry - awful. Partly because it's mono, but mainly because it sounds - to me, anyway - dull and dead. Sorry, again.
Mic A sounds 'dead' to me because it has no 'sparkle' ..it's pedestrian, plodding, and may perhaps be reproducing sound 'accurately', but leaves me completely un-interested in what I'm hearing. It has a touch more bass than Mic B.
Mic B ..no comment. I wouldn't want to use that mic. It's like Mic A, but with less bass.
The third mic has a bit more ..that's to say more pleasant.. sibilance than the other two, especially than Mic B , in which the 'S' sounds of Spanish Harlem are pretty much missing (like the missing sibilants in Linda Ronstadt's 'You're No Good' (not included here, but missing on all issued recordings).
I'm listening on a pair of Titum cans, and trying all six available profiles to try to get the best out of these recordings. (The 'Tt 770x' setting seems to deliver the best - for me - out of these recordings.)
But I have no idea what your "fairly dull living room" actually sounds like; I've never been there, so I have no idea how these recordings compare with actually being there ..so I don't know if they're 'accurate' or give a completely false impression of what the sounds actually sounded like when you were recording them! ..So I can only guess what the original sounds were like, and how much each of these mics delivers the original sounds.
But recording from loudspeakers is nothing like recording an actual singer, or a person speaking, or live musicians ..so what's the point? Why didn't you set up the three mics in front of (a) a person speaking, (b) a person - or persons - singing, (c) a few musicians? All these tracks sound - to me; YMMV - terribly compressed, as if there's no real range to the various frequencies of the audio, and also terribly ..well, 'muffled', as if recorded through a sock.
I don't know what it actually sounded like 'live' in your living room, but - I'm sorry to say - I wouldn't use any of these mics, unless your room really DOES sound like these mics deliver!
What would I use to capture audio out of speakers in a living room? ..A pair of M-Audio 'Sputnik' tube mics (about £250, that's about US$318, each). They sizzle! ..And rather closer than 2.3 meters away. But so much processing seems to have gone into playing these sample sounds that there's next to no life left in them. "..normalized.." ..that's what's killed them. Why ever would you do that? ..Sorry. ..G'nite.