Going back to the OP's original question for a moment, Transporter owner
here and had that exact same question.
Spent quite a bit of time listening and comparing the different digital
outputs from the TP, so have direct experience which hopefully is of
help. :)
QUICK VERSION?
Transporter Dac sounds great, but can be bettered.
XLR was the best sounding to me, but only with a high end digital XLR
cable.
This hookup to my dac is noticably better than any other.
BNC second best, again cables make a substantial difference here.
RCA and optical much of a muchness, though optical with a glass (not
plastic) fibre sounded better than RCA.
LONG VERSION!
I wanted to know I'd at least tried them all and found (to my ears) the
best sounding connection, if indeed there was any difference to be
heard!
Have a pretty resolving system and I can hear differences between
equipment.
The TP run from its analogue outputs sounds extremely good, and you need
a pretty good Dac to better imo it but it can be done.
As a digital transport its superb, sounded noticably better than my old
SB3 into the same Dac and better again than even my Touch when I
directly compared them as transports playing the same 24/96 stuff.
Unexpected...yup, but thats how it was.
So I'd NOT advise selling your Transporter or ripping its guts out!
I was looking at upgrading it (because it only does 24/96 and thought I
was missing out) and took it to local Linn and Naim dealers to see what
the current streamers could offer.
From its analogue outputs, the Linn and Naim players were better,
particularly the higher end ones.
As a digital transport though...it gets REALLY interesting...
* Naim?
Preferred the Transporter to the Naim players, less "hifi" and more
about the music.
Was only when the dealer bolted in a megabucks powersupply that the Naim
got better.
*Linn?
Preferred the Transporter all the way up the range until I heard the
Klimax player, their top of the line and costs silly money. Wow..its
noticably better.
I came away without spending any money and seriously impressed by what
the Transporter can sound like in a really high end system.
So dont sell your Transporter...its potential as a digital transport
wont hold back what a really good dac can do.
Best digital output to a Dac though?
Tried all the digital outputs into my Dac (modded M2Tech Young with
linear psu) and despite what Sean Adams had said...I found AES/XLR to be
the best sounding.
Yup. :)
BUT (and puts on flameproof coat) this was only with a high end XLR
digital cable.
Started off with a good quality Bluejeans cable, didn't sound as good as
the BNC output.
From recommendations on Computer Audiophile forum, I bought a couple of
American cables.
On to a DH Labs 110, better again but BNC still better.
finally put in a Morrow Cables Digi4..
http://morrowaudio.com/audiophile-and-home-theater/digital-cables/dig4-grand-
and wow, big improvement and quite a bit better than BNC, and this was
using an equivalent level BNC cable.
BNC was the next best sounding to me, and was only bettered when I put
the Morrow digital cable in.
RCA was "ok" but optical sounded a little better, but only with a glass
optical cable.
Just my experience, my ears my system.
I really wanted to get this one right though so it didnt niggle away in
the back of my mind, and happy to say I've got there.
Happy to run my Transporter into my Dac as the internal dac can be
improved on, and that XLR is the best digital hookup type.
Invest in a Morrow digital cable, seriously, its worth every penny and
shows just what the Transporter can do.
Its been a bit of a cable find to be honest.
A cheaper option would be the DH Labs 110 XLR cable, that sounded good,
but doesn't get close to what the Morrow does.
Further down the line I will retire the Transporter, mainly as at some
point I will upgrade my Dac and I am curious about DSD.
In particular Im looking at the PS Audio gear, which is pretty
innovative in what their Directstream Dac does. Not cheap though so need
to save up for a while.
Happy to enjoy the Transporter in the meantime, its a helluva piece of
kit.
But yeah, Sean got the Transporter exactly right and it will sit happily
with any upgrades to your system for a while yet.
Hopefully this is of help to the OP. :)
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