How old is too old for a Dac?


Been out of the loop for a good bit, and wondering how much things have changed in digital. In other words, how old is too old for a dac?
spoogemonkey
Charles to be honest the AN keeps getting better by the day I haven't been able to take it out yet! I I am pretty convinced the AN is considerably better than the Yamamoto but hearing being fickle I will give the Yammie one more listen before I decide.  Off to NYC for the weekend so that will likely be next week or weekend.  There is just something so right about the AN though I feel very fortunate to have won that auction now!
Cheers,
Jon
Jond,
I'm not surprised that the Audio Note is impressing you,  it has been highly praised for many years.  Excellent design and implementation withstand  the test of time. No doubt that using Duelund CAST as my output coupling capacitors improved the Yamamoto DAC further.  I'm certain that I'd be just as impressed with the AN DAC as you are. Congratulations. 
Charles 
Spoogemonkey, I think you are wondering if you buy an older DAC, how far back can you go?  I would say that unless you select a DAC that was $5000 plus new, you probably shouldn't go back more than about 5 years. 

As noted, there have been massive improvements at the lower price points from about 7-8 years ago, and this improvement still continues, although improvements are slowing. Arguably, the best sub $500 DACs today, would probably compete with most of the sub $5000 DACs from 10 years ago. 

Take a look at Bryston, Ressonessence, Chord, etc. The younger folks seem to really like Schiit, Brooklyn, Woo Audio, etc. I just got a deal (more than 50% off) on a Meridian Director so I thought I'd give a try.  With just a few days to listen suggests it is pretty good for the price point. 

spenrock
How old is too old for a Dac?
Age with this one (more than 16 years old), doesn't come into it. As it's still one of the most sought after dac ever for converting PCM (Redbook cd 16/44 or 24/96 or DXD).

http://www.advancedaudiorentals.com/products/details/productid/64

http://www.goodwinshighend.com/manufacturers/pacific_microsonics/pacific_microsonics_model_two.htm

Cheers george
@spenrock

Though there were some useful posts in reply to my OP, your reply seems to be more of the information I was looking for. And it makes sense.

One would have to be close to a wide range of product developments over many years, and there likely many people around with that knowledge set that don’t have a dog in the hunt.

Bryston, Ressonessence, Chord... Do you mean newer ones? 

Thanks