I dont have personal experience but i have read glowing reviews of this unit.
Hi, I don't have experience with the 06 but I do have the Olive 4HD. There are many things I like about this unit although there are some 'issues'. I figured I'd chime in because the issues I have with the 04 I'm pretty sure are overall Olive issues and not model specific. Starting with the positives, 2 TB of storage is a ton of room. Accessing the unit via iphone/ipad is very convenient. The O4 has an internal DAC which sounds ok but I bypass. I read the 06 is similar but its internal DAC sounds pretty nice way better than the 04. The user interface is a little frustrating. The front user interface is touch based and doesn't always respond to what you are touching, or it takes awhile of leaving your finger where you are trying to touch and maybe it takes maybe it doesn't. This can be very annoying when typing in meta data details like album or title. I don't think Olive has completely figured out how it wants to cross check meta data info from a third party source like gracenote so depending on how you transfer files to it, you need to make sure the files are split and titled right before you transfer them. You can edit once they are on the device but it's not a fun process and would be nice if the machine could just reach out and get the info for you like I've seen in other devices. The device can be also access via a web based format which is ok but still needs work. It is slow and a little clumsy at times. Another peeve which I think they are working on, is you can only shuffle if you make a specific playlist you can just go to an artist or genre and hit shuffle like the ipod. Also note that Olive's data retention is proprietary, this is a fact that has me terrified because g-d forbid they go out of business once I don't know how the data will be able to be manipulated off the device. I've tried queuing them on this topic and they are not responsive. Once the data is there it's there the only way off is to rip a cd or send them the device to get it off for you. So to sum up I really like my Olive but I think that's because I'm completely sold on the idea of a music server(not a pc but an actual piece in the rack that holds all your music) would I recommend to friends/fellow enthusiasts, yes but with some caveats and reservations. I think Olive is aware of their shortcomings and working on making them better. I sure hope they do.
By chance, I went to a streaming demo at my local store last weekend. They had the Naim HDX and the Olive 06 and 04. Firstly, I'm afraid, the 06 is way ahead of the 04 in sound quality, greater detail and bigger sound stage. The Naim HDX was comparable to the 06.
It is difficult to compare as they were in different rooms, the 06 a Krell Kef blade set up, the Naim, a naim electronics and Sonus Faber stand system.
I would put both at a comparable level to my Leema Antilla, a good player in the £2500 price level, so neither of the straming solutions seem to challenge very good quality CD players, yet. The retailer rapidly configured an Ipad to control the olive.
On both systems, Hi res, 24/96 I believe, clearly beat standard CD quality and a big plus, was the quality of some of the better internet radio channels.
So I would say from this demo only, streaming is not yet matching top CD quality, but that is my only exposure, so there may well be better.
I have an Olive HD60. WARNING: In my opinion it is useless for large CD collections. I had hoped it would make finding and playing CD's from a collection of nearly 4,000 classical music CD's easier. While it is simple and fast to rip them to the HD, the metadata is usually wrong, missing, or useless for searching purposes. I am not sure how much of this problem is due to the device's use of an internal database or each CD's stored data. I use the database Music Label 2012 (fantastic and inexpensive software) to organize this collection for searching. This pulls down accurate data for each CD from Gracenote CDDB2. Wish the Olive would do that. To edit each entry into the Olive, one has to use the online software Maestro which connects to your Olive over your network. Maestro is excruciatingly slow and unstable and poorly organized. It has to be restarted often. Hence, after painfully entering only about 300 CD's with corrected data into the Olive over many evenings, I quit. By the time I would get it all in, the device would be obsolete and I may have died along the way. Maestro makes the Olive HD60 useless for large collections, especially for classical music with its necessary long titles and bits of critical search information. So its just sitting waiting for either something better to come along or a major overhaul of Maestro. The server does sound great, though I have to admit I am only accustomed to low cost audio gear. But to my ears it sounds very distinctly better than playing from my CD players. Again I have low cost gear so that is what I am comparing it to. One set-up is a Jolida JD100 tube CD player through a Jolida 202A tube amp to Yamaha NS-1000M speakers. Another is a Tascam CD player through a Jolida 302B tube amp to a pair of Yamaha NS-1000M speakers. The third set-up in my house, in the kitchen, is an Eastern Electric Minimax tube CD player through a Jolida 202A amp to a pair of Dynaudio Audience 42 bookshelf speakers. The Olive is my fourth set-up, playing through a Jolida 302B to a pair of Axiom M60's. The difference I hear I can not assign totally to the great Axiom speakers so the distinction seems likely attributable to playing direct from a HD and the components in the Olive. Still, unless one can organize and mark the stored collection in the Olive for searching large collections with complex data, its useless. Another fault I find is the really large text on its screen and on the iPhone used as a remote. I can only see a few words of each title. If a CD title begins with my inventory number and composer: "2810 Beethoven...." that's about all I can see. I can not see the composer's title let along the Opus number or key. That large type (do they think we are all of poor eyesight?) makes the Olive especially useless for classical music. I expect there will be a small surge of competitive products coming along soon. I should have waited awhile. But maybe Olive expects this too and will get busy making their device useful. Finally, the touch screen is poorly responsive.