@richdirector You are along the right track! The effect of being bored with the sound is nothing to do with the manufacturer, still less any intent to deceive. We simply get bored with the sound of our equipment. It familiarises. It doesn't excite us for long. No different from starting with a new woman. At the beginning, it's all thrills. But the excitement soon wears off. It's a human failing. Thank goodness it's way cheaper to replace hi-fi kit than wives.
@invalid Krell launched its first product, the KSA 100, in 1982, so it's 41 years old now. Yes, I have had my KRS 200s fully serviced, mainly replacing all capacitors. Still going strong. Very.