You are obviously not a classical musician--live music in a concert hall is a completely different experience than listening to high-quality audio by yourself. I'd bet a thousand dollars that I can tell the difference between listening to music in a concert hall vs. listening out of high-quality speakers.
Of course! the acoustics in a concert hall are very different then speakers.
But I bet you that you wouldn't be able to tell the difference between actual instrumentation and high quality speakers and subs if they were BOTH in a concert hall.