How to add depth for classical music


While listening to classical music, especially the orchestral pieces (e.g. Beethoven Piano/Violin Concertos, Symphonies), I find that my system is not giving me the depth, such as layers of instruments etc.   My listening environment is not ideal.  I have hard wood floor and tray ceiling.  On one side, I have windows and on the other side, I have a long corridor.  

Here's my system:
  • Parasound P5 & A23
  • Sonus Faber Venere 3.0
  • Bluesound Node2i
  • Chord Qutest

Would a new preamp/amp or integrated amp help?   I've auditioned Moon (SimAudio) 340iX and thought it's more opened than my Parasound.   But for some strange reason, I didn't really like the sound.   Maybe I need to audition again.  

Would room treatment help?  But my options are limited because of my room.

Love to hear your thoughts.
pc_audio
@jorgean Adding a Lumin D1 with Sbooster also improved my system considerably, the onboard DAC is solid and would be considered reference for most people
Good to hear. I was considering the D2 but decided for the U1 Mini since i already had the DAC. 
If I was just looking for a transport to and external DAC, I'd be using the U1 Mini as well.  Great little unit.
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).