Unfortunately, the experience with this has been rather frustrating. I wanted to go for the fiber option option as it was suggested on the Apple Hifi website.
However, walking to the huge Apple Store in San Francisco I did find that they don't offer a cable with 2 mini-optical connectors. I decided to pay the apple tax and buy 2 macXtreme cables, which are Toslink-Toslink cables and come with ONE of these precious adapters.
However, the result didn't work at all. Full stop. After swapping around all kinds of elements I decided to make an appointment at the Genius Bar today. Folks down there were as puzzled as I was and didn't have clue. However, they - and that really speaks for them - didn't easily give up and send me away and finally we found that using a different brand of cable, it somehow worked. Furthere experimentation turned out that....
- Belkin PureAV Cable + 1 Belkin adapter + 1 macXtreme adapter: works, no matter what side (MBP or Hifi) has which adapter.
- Belkin PureAV Cable + 2 macXtreme adapters: doesn't work!
- macXtreme Cable + 1 Belkin adapter + 1 macXtreme adapter: works, no matter what side (MBP or Hifi) has which adapter.
- macXtreme Cable + 2 macXtreme adapters: doesn't work!
So - basically when there are macXtreme adapters on either side, it didn't work for all. The only logical explanation that we could come up with is that, unlike the Belkin adapter, the macXtreme adapter loses some of the optical signal and two of those make the loss large enough to get it over the edge.
I purchased the Belkin cable and now it works, happily.
So....
1. Apple, if you read this, you should make sure that your stores carry optical-optical cables with 2 adapters that you can use to connect the Hifi to an express - or take the ad for this combo off your website.
2. Don't sell macXtreme cables in your store, as they simply don't seem to work in this use case.
Cheers,
Florian.