Remarkably better sound possible with just 1 system component change?


I could have posted this discussion to a few other categories but chose this one because discussions related to 2 of the 4 components in question belong here.

So it's been ~2.5 yrs since I purchased my current system. I did a lot of research at the time here on audiogon, but no auditioning, and put together a system that sounds very, very good to me.

While I have no complaints, the itch to upgrade has surfaced recently.

I am curious as to whether you guys think it will be possible for me to replace just 1 of my primary 4 components and obtain significantly better sound as a result. The more discernible and obvious the sound improvement, the better obviously. I am not looking for a marginal upgrade - I want dramatically better sound. And I am not looking to replace more than 1 component at this time. I am hoping to get a few ideas/candidates and then may decide to audition some of the recommendations before making a decision. Hopefully some of the upgrade paths are such no-brainers that I may even be able to take a leap of faith without auditioning. Note also that acoustic room treatments are not viable in my current listening location.
 
My current 4 part system:

1. Lumin D2 - 100% of my listening is streaming via Tidal
2. Mcintosh C2600 preamp
3. Mcintosh MC452 amp
4. Focal Kanta 2 speakers

Cables are Cardas Golden presence RCAs from the Lumin to C2600, Cardas Clear Cygnus XLRs from the C2600 to the MC452, and Kimber 8TC speaker cables to the Kantas.

Soundstaging, dynamics, imaging and overall clarity are all great. I have to say I love the Be tweeters. And the bass is punchy, tight, fast and certainly sufficient for my needs. Vocals and overall sound are warm, liquid smooth and analog-like, just the way I like it. (Forgive me if I've botched some of the characterizations - I'm no expert at this). The only thing I can think of that could use some improvement is the sound quality at lower volume levels, although that is not terribly important to me since most of my listening is in the 90+ Db range. Would be nice, though.

So while I do love the overall sound, surely dramatically better sound can be obtained via a 1 component swap? Budget is ~10k. Or will I need to spend more, or upgrade more than 1 component to achieve the desired result?

Thanks in advance for your time and thoughts.

chandybe
Your cabling should all be the same technology for the best performance. You did not mention your power system. Power is the foundation. Depending where you are you may want to consider a power conditioner, but get your self some good power cables. I suspect you will probably forget about the component upgrade. I could be wrong I was wrong once before.
@chandybe Ok then let’s go with your balls to the wall lifestyle!  The speakers you have do not fit that sort of environment.  It seems to me you would really enjoy speakers that deliver a more dynamic, punchy room energizing sound.  I would go JBL 4329 (or higher), possibly Klipsch Heritage series.  The sense of liveliness and energy would really rock that room and be fun to listen to during a party as well.  That kind of change will invigorate your listening experience and add excitement to your music!
I also think the speakers matters the most and that the room is important. Maybe aim for the Sopra 3?

You can also try to add a new dac and only use the Lumin as a streamer. The Okto Dac8 got a great review in the latest Stereophile. 
I personally found it very satisfying to see how each step/part was added and noticed an improvement.  If I spent my 10k on one thing i would soon want to add another.

Sound treatments are cheap at least i didn't spend much.  Helps all elements of sound.  Might be difficult in your room. 

Clean the room up.  Make sure speakers are in right places.  If you get some extra room.  Subs might work.  Duke will sell a pair of subs(not as big as you think) and an amp for 1600.  Other crazy high sub prices don't make sense to me.

If you want to sit that far back different speakers may be in order.

Sound treatments are cheap

If my understanding of room treatments is correct -- given how much area of a typical room needs treatment -- doing room treatments adequately is not at all cheap. This is not due to snake oil or overpriced panels, etc., but due to the physics of acoustics and the sheer area of wall, ceiling space that needs to be addressed. Remember, the OP is asking for a "remarkable" improvement in sound.