System forclassical music

@pkatsuleas , I did mean Decibel Audio.  It’s been a few years since I was there and was trying to recall the name.  I think there used to be a used record store called Rogue Records on the same block.  Thanks for the correction 

We’re you trying to say Charpontier in the OP?

In general, as someone who listens to Classical about 99%, I prefer accuracy, and not something that sugar coats bad recordings.  One question would be if they value surround sound, as Classical Music lovers have kept SACD alive for the last 20 years.  Assuming that the answer to the above is no, you still need to know what the preferred source will be—CDs, Vinyl, CDs that have been burned to a HD,Vinyl, tape, etc.  In general tubes somewhere in the system—preamp is fine-provides a better soundstage depth, so the percussion sounds like it is coming from the back of the Orchestra and not from the Conductors waist pocket.  Also a sub to get those really low percussive effects that composers such as Mahler and Shostakovich revel in.
  Sinus Fabre is usually the speakers touted for CM, and they look great, but I’m not a fan due to colorations.  I would rather get a value for money speaker like Paradigm

They don’t sound like they are very sophisticated in audio, so I wouldn’t assume that streaming would be the source.  They may have an interest in surround sound, since they currently have in walls and these may be in some type of surround set up (as well as the SACD issue mentioned before).
   Chicago dealers: My current is Simply Stereo, located in the suburb of Palatine
I have also used Saturday Audio Exchange, located in the city on the North SIde on Belmont Ave, and Rouge Audio, on Milwaukee Ave in Bucktown.  Dave at Simply Stereo is a fantastic guy who won’t try to sell them equipment they don’t want/need and will do his utmost to try to integrate stuff that they already have, if that is the way they choose to go.  I have friends that moved into a townhome that had in walls that were of the same vintage you described and that were bizarrely wired (I couldn’t figure it out, at least).  They wanted to use their then current AVR (despite my pleas to junk it, as they could afford much better and are also discerning music listeners) and they were tremendously relieved when he didn’t bat an eyelash when he simply plugged in their AVR after making some necessary changes in their wiring (other people they dealt with were trying to sell them mega bucks systems that was a step to far for them back then.  They have since come back to Dave on their own and started upgrading).
  Finally-if they live in the area, have been vaccinated, and aren’t Serial Killers, I can host them for an afternoon.  I have one “HE” two channel system and two midfi HT systems in my home.  I use digital sources only.  Contact me privately if their is interest

Do people really believe that some systems are good for Classical and bad for everything else, and vice versa?  I would hope that a good system should excel in all areas of Music