How old is too old for a Dac?

spoogemonkey, I'm not sure, since I only moved up to higher-end gear about 12 years ago. I've noticed the most noticeable improvement is in budget DACs and CDPs. New units sound smoother, more realistic than those of the 1980's and 90's.

I have an older ARC CDP ($5000), and there are better sounding units for less than $2000 now.

@jond , I really should have stressed that entry-level, or budget units have had the greatest improvement. I’ve heard Esoteric and Naim CDPs years ago and they have always had superior sonics. My friend’s digital in the 1980s rivaled his analogue setup.
IMO, there has been a "trickle-down" effect of technology that in the past was only available to high priced digital.

@lowrider57 ah well that makes much more sense and I would agree in fact generally speaking I think budget gear, not just Dacs, do sound better than they used to. Cheers.

@jond , yeah, sorry about that blanket statement. I should have reread my comments before posting them.

Hi Jond,
I gave very serious consideration to buying a used Audio Note DAC. At that particular time the then Yamamoto U.S.distributor (Venus HiFi) had been a longtime Audio Note dealer. He was extremely impressed with the new Yamamoto YDA-1 DAC. He told me that you’d have to get a AN level DAC 4.1 to equal the Yamamoto.

I trusted him and got the much less expensive YDA-1. I suspect that I’d been happy with the AN DAC as well. That was 8 years ago and I’m still very satisfied. Your mentioning the AN 3.1 Signature DAC brought back that episode. No doubt your AN DAC is terrific! I did install Duelund CAST output capacitors about 6 years ago. It went from excellent to superb 😊
Both companies pay much attention to the power supply and analog output stage quality. Both also avoid using opamps in their circuits (for the same explanation, no negative feedback wanted). Both DACs have stood the test of time.Jond I  don't believe that it's coincidence that both of these manufacturers also built SET amplifiers.  They applied the same principles to their respective DACs with obvious success. 
Charles