Not how long the thing itself works, how you get sound out of it, but the performance in relation to the price. The point is that development, It's moving forward. At different speeds for different things, how development, improvement, change takes place.
New or old or new? Does not matter for. Compared to seven years old or new:
Not if the thing itself works now, if you get sound out of it. It is of course about what you can get today in terms of performance in relation to price. Different things develop at different speeds.
A 40 year old:
View attachment 220408
Om the other hand a seven year old:
View attachment 220410
Little difference in new vs old there. To connect back to our world. These class D amps that Amir is testing that have about as much power as a 20 year old NAD. Not much of a difference, if I may guess, in terms of sound quality. However, an old DAC (considering its price another matter):
https://audiosciencereview.com/foru...surements-of-nad-c-320bee-pwr-amplifier.8504/