So far the only review I really found was here: http://www.computeraudiophile.com/content/Antelope-Zodiac-Arrived
quoted from that thread from a guy who did comparisons....
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Here are some of my opinions/answers to the rest:
1. The tests were done on usb and able to show 24/192 or 176 for the relevant file. I wouldn't know about the upsampling but it is detecting the correct bitrate for sure.
The sample rate changes automatically. However, I do note that the owner did play each file in isolation (no playlist), so not sure if that affects anything.
I took it that it was working as it is, and did not question any further.
2. How it sounds - like I mentioned, I have a hard time doing a fair comparison to the dac due to the usb cable and adapter issue. The owner's previous dac was a benchmark dac-1 pre, and the sound character is quite different. Let's take this as a base line. I'll list some impressions which I hope helps some.
In my listening session the Zodiac+ does feel open sounding and presence is fine.. tonally sounds rather neutral. I feel the benchmark does have its own sound, hence the difference. The owner was not quite used to the Zodiac in the system so had to take awhile to adjust (or more tweaking to come).
Overall, those present felt the benchmark is more precise of the two for 16/44.1 (all-around and especially in bass) - albeit being brighter - and that there is less dynamics from the Zodiac. Generally it is felt that the Zodiac has a more forgiving type of sound and may match more systems.
But as I mentioned, it's not a fair comparison as the benchmark ran on a Locus usb and ESP power cord (we hooked this to the Zodiac adapter) which in total made the 'benchmark setup' cost more than the Zodiac.
Where the Zodiac impressed me more was on hi-res files where it really had a significant improvement in SQ, and this should be the reason why you would want to buy one.
For 16/44, I would put it in the same class as others of similar price range really.. such as the Naim DAC. Not a significant upgrade (if at all) from DACs like the w4s or benchmark, but offering more features - especially on the hi-res front which may be worth it to some.
Having said that though, when the Locus usb adapter (my friend sent a request for one) arrives, a better power adapter comes, and the Zodiac is more run-in.. maybe all thse impressions could be moot. Hence, final impressions remain to be confirmed. I can only imagine the Zodiac sounding better once we solve these issues due to the Zodiac's oddities and are able to perform a more proper comparison.
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Interesting, in summary he feels its the same as a benchmark for redbook but for hi-res it is spectacular........