Jeff - I've been thinking a little more about your quest for a one box solution. Well, here is something to consider: A MacBook Pro...
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OK, now that's a one-box option.
However, the question is whether it sounds as good as a purpose-built server that has been optimized for silent operation, low noise, removal of unnecessary operations, etc?
While the MBP probably sounds very good, I've read many reviews that suggest the one box servers sound better, maybe way better, than the standard MBP or PC route. This is supposedly achieved by using fan less designs, linear power supplies, special USB cards (ie, sotm), low power CPUs, noise filters (sotm sata filter), optimized OS stripped of unnecessary operations, specialized ripping software like DBpoweramp, and excellent playback software like Foobar or JRiver.
Ultimately, I'm looking for the transport/dac combo to rival an excellent CDP. That's the purpose of the thread. Education on one box server options that can potentially replace the CDP. And yes, I know there are very good multi-box setups, ie, the Bryston, Auraliti, CAPS, etc, but for my purposes and the purpose of this thread, I really want to focus on the all-in solution (except for the dac, which will be outboard).
For me personally, I've got the Esoteric K-03 coming in, so the dac part is taken care of. The question, as raised above, is
how much needs to be done to a server to make it audiophile grade? I listed a bunch of measures above that supposedly get you closer to "grade level" than a standard Mac or PC.
However, to throw a curveball at all this, if you read (he posted at CA, AA, and I think Agon too) Elberoths comparison of top shelf CD transports (really top end, like Debussy) he came to the alternate conclusion that the Berkeley Audio Designs Alpha USB
converter made much more of a positive difference than the Transport.
Is it possible that a good outboard USB converter removes all the jitter and noise issues inherent in a non-optimized mac/pc, and makes them comparable to a purpose built server, and more important, equal in SQ to a very good CDP (when coupled with with excellent dac)?