Argyro,
I'm very demanding when it comes to pitch,timbre and weight. I simply can't tolerate if the instruments don't sound like real instruments. I grew up being exposed to live music on a regular basis. My wife used to be a cellist. Many of our friends are professional musicians. Some of them play at the NY Metropolitan Opera, some in quartets and some are independent. I tend to enjoy very much the rehearsals since they are sometimes in a room similar to my listening room, so this allows me for comparison with my system. I also have had my ears checked by an Audiologist for the last few years. Each result indicated that my hearing is excellent.
Based on my experience and my music interests, I can tell you that the Spectron mono-blocks, in the current state of my system, are extremely close to the real performance. I have not heard any system, regardless of price, that can produce the laser-sharp soundstage definition that I'm getting with these amps, while at the same time carrying the pitch, timbre and weight of real instruments.
Best,
iSanchez