Realism in instruments how to achieve it?

@ditusa excellent video and spot on advice.  

On related topic I most strongly recommend learning how to do automatic room correction by creating a custom convolution filter file and applying it in Roon.  

Pure audio project just came out with a duet 10 made specifically for smaller rooms. 
 

take a look. They with a 300b set amp…. 
 

r

Speakers do create the form of the End Sound produced, which will in many cases, be presenting sound that has a strong impression their is an honesty in what is being heard.

Speakers can only really do their best when a match to the down stream is optimised and the sent signal is off a quality that enables the End Sound to become a sound that creates the impression honesty is presented.

A simple way to start to play with the End Sound is to look at mounting methods, for both Speakers and upstream devices, especially those with a Valve Circuit.

The wire type used in the signal path and Cable Connection / Chassis connection are both very good at creating the form that can be perceived in an End Sound.

Swapping devices is not really a solution with a certainty to what will be the perception of an End Sound.     

source > speakers > amplification

Ultimately you won’t hear a string’s realistic buzz unless all three are up to the task. The last thing I would add is a tube amp.

What you're looking for is exactly why I keep my old ProAc Response 2's and use a 30 wpc tube amplifier, specifically a classic Williamson-type circuit that I built myself.   I mostly listen to classical and vintage jazz, and I like a rich, coherent sound, where instruments and voices are properly staged and grounded in a real space, not floating in the air or appearing from nowhere.  Realistic midrange reproduction is particularly critical for this effect.  So is a preamp, which, in my experience, can add weight and body to the music that you don't get from the music source alone.  For "bookshelf" size speakers, don't cheap out on stands--the ProAcs need a hefty stand to sound their best.  Cables make a difference too, but the speakers and amplification are, IMO, the two key ingredients.  

I like Spendors and Harbeths.  You might consider Fritz speakers, which I heard years ago at a show and offer the kind of sound I'm talking about.  I would try a medium-power push-pull tube amplifier.  Stick to 25-40 wpc.  More than that and you start to lose some of the magic.

A lot of folks here will scoff, but I'd be willing to bet that a properly-restored Fisher 500C would bring you more pleasure and realism than that Class D amplifier.  Whatever other limitations they may have, the classic Fisher, Scott and Marantz equipment was designed by people who went to jazz clubs and symphony concerts, and knew what real music sounded like.  I'm not suggesting you rush out and buy any old vintage piece from eBay, they have to be professionally refurbished.  But you might be surprised at how much musical enjoyment those older pieces can produce.  My goal in building my own amps and preamps has been to reproduce that sort of sound with updated components and refinements.