Better designed players have multiple power supplies and shielding to
prevent this. Cheaper ones do not, so it is all over the place as to
how a "one box player" might be constructed or measure or sound. In a
pinch, I bet even the cheapest sound better than your old tape player
(pun unavoidable!).
- Bill
www.uptownaudio.com
Roanoke VA
(540) 343-1250

"Steven Sullivan" wrote in message
...
Stewart Pinkerton wrote:
On 29 Jan 2004 20:29:55 GMT, Steven Sullivan
wrote:

Stewart Pinkerton wrote:
On 29 Jan 2004 16:11:27 GMT, "Alan Murphy"

wrote:

"Stewart Pinkerton" wrote in message
news:EMURb.175034$xy6.818966@attbi_s02...
On 28 Jan 2004 16:01:32 GMT, (Rhgoo7) wrote:

Has anyone heard the new Musical Fidelity TriVista DAC and
formrd an
opinion of
this unit?

Overpriced and overhyped - typical MF. Buy a good one-box
player,
ideally a 'universal' like the top Denon or Pioneer models.

Why one box. Provided the output is reclocked from the dac the
two box solution seems to offer a number of practical
advantages.

But it's *not* reclocked, which is why it's of necessity
inferior.
Check jitter results for even a cheap Sony player against these
so-called 'high end' DACs.


Stewart, what do you make of the technical results of
comparing one-box vs
separates in this paper, where Dunn et al conclude that
disc- or player-related sampling
jitter is NOT the cause of the distortion observed in their
measurements of one-box players?

http://www.prismsound.com/downloads/cdinvest.pdf

I don't see anything relevant there, and as it happens, I was one
of
the 'postal votes'. Note that there is well-documented evidence of
significantly lower jitter in one-box players from many years of
Paul
Miller's technical tests in HFN.

But Dennis et al. seem to find that jitter isn't the culprit of
the spuriae they measured specifically in one-box players;
they attribute that to 'amplitude modulation
of the analog outputs by motor- and servo-related interference'.
See the section 'Measurement of Spuriae'
and the first few paragraphs of the Conclusion. It appears,
unless I've misunderstodd the paper, that
one-box systems measured consistently worse than two-box systems
in their tests. The distortion is posited to be audible
(see paragaph 1 of the Conclusion) though
the audibility of the distortion was not
directly tested.




--

-S.

"They've got God on their side. All we've got is science and
reason."
-- Dawn Hulsey, Talent Director