How to add depth for classical music

I never expected to come to Millercarbon's defense, but while I can't vouch for the HFTs, I can vouch for the SR Blue fuses. I replaced the fuses in a Lyngdorf TDAI 2200 and there was a noticeable improvement that I had not expected. 

What are some good recordings to test depth/layers?

The Wand of Youth on EMI. Play the track with the Tame Bears and the Wild Bears.
Any Decca or British RCA recording with Kenneth Wilkenson as the recording engineer.
Most of the early RCA Living Stereos or Mercury Living Presence have plenty of depth. Basically a good hall and a 2 or 3 mic recording technique will do the job. Spotlight mics almost always ruin depth. For the most part on this account, unless told otherwise stay away from Deutsche Grammaphone (although they do have good pressings and performances).

Good suggestions by Ralph ( @atmasphere ). Also, some years back Chesky remastered a few of the recordings originally engineered by Kenneth Wilkinson and issued them on CD, with spectacular results. I don’t know if they are available on any of the streaming services (I note that you only listed a streamer as a source, although perhaps you also have the Node 2i linked to a computer that can play CDs), and the CDs are no longer in print, but you may be able to find some of them at Amazon or eBay in used condition.

I would particularly recommend the following, both of which are fantastic IMO in terms of both performance and sonics:

Dvorak "New World Symphony," Jascha Horenstein conducting the Royal Philharmonic Orchestra, Chesky CD31. (You will not believe this was recorded in 1962!)

Brahms "Symphony No. 1," Jascha Horenstein conducting the London Symphony Orchestra, Chesky CD19 (also recorded in 1962).

Regards,
-- Al

I never listened classical music until I got onkyo m5000r p3000r .Amp is connected to my own horn speakers.Internal dac and bryston dac does the job nicely.