Is a femto clock important if you aren't using asynch USB?


I am considering buying a used Wyred 4 Sound DAC2 DSD se for streaming from my Bluesound Node 2i, and the seller told me that this DAC2 se is one of the early ones that does NOT have a femto clock.  My Bluesound does not have USB output, so I won't be using the USB input on the DAC2.  My understanding is that the femto clock is mainly useful to sync up the digital stream from a computer; is it likely to make much difference if my source is a streamer and the input is SPDIF?

128x128cheeg

Thank you all for your input, but I should have made my current setup more clear. I now have a Benchmark DAC1, which I like pretty well; I was not planning on using the Bluesound’s DAC, which I do not like as well. My goal with the W4S DAC is to improve on the Benchmark; what are your thoughts?

PS, the rest of my system is a McCormack DNA1 Gold rebuild with gravity base jr (LOVE), a Modwright 9.0 SE (meh), and Usher MD2’s (like very much).

@cheeg 

I believe that many have already told you that the W4s is not a good choice, but you have ignored those posts and ask once again the same question.  If you are going to get it then go ahead, but please read reply’s of those responding.

@dirkjanl and @erik_squires I wish the two of you would get together and publish a book "DACs for Dummies". I love the insight you both provide on this forum, but sadly I can only follow what you're saying about half the time (my bad).  However, I do appreciate Erik's attempt to break through the fog by closing with a warning against chasing a 10 year old DAC...

The Modwright is a good unit, but it might make more sense to sell it and put the money towards a new (or at least <3 years old) DAC, and go directly to my DNA1 (using the Bluesound for volume control); any thoughts?

@vonhelmholtz I read each of the replies quite carefully, including yours.  My understanding is that a femtoclock will not fix an incoming bitstream unless it is operating in async USB.  Absent that, the clock in my Benchmark DAC1 is probably good enough that I would not detect the difference that a more accurate clock would provide.  If you have an opinion on that, I would appreciate it; if not, thank you for your original input.