LCMusicLover
Headphoneus Supremus
Anyone with Cowon Plenue D and Opus#1 did any direct comparison to the X5III?
These are 3 fairly different devices in terms of capabilities. I had the Opus for a while, and I still own the Plenue D and the X5iii.
Opus and Plenue D are player-only devices (no streaming) while X5iii has streaming. PD only has 1 SD slot, limited to 128Gb, while X5 & Opus have 2 (although the Opus seems to be limited to 200Gb cards). Folks have reported using 256Gb cards successfully with x5, and supposedly it will support 512Gb cards when they become available.
Prices (in US) are ~ $200 for PD, $359 for Opus (musicteck.com) and $400 for X5.
Opus and X5 have balanced and single-ended output. PD has single-ended output only. Opus has optical out while X5 has coax out (for use as transport).
X5 can be used as an external USB DAC, PD cannot. Opus is supposed to be able to do that as well, but the original Windows drivers didn't support that functionality. I don't know whether it has since been implemented.
X5 firmware is buggier than the other two, Opus has 'best' firmware/UI experience. PD is solid (no crashes) but the UI can be somewhat laggy.
Battery life in X5 & Opus are similar -- 8 - 10 hours ish. PD has MUCH longer battery life (more than 50 hours). In fact, I've never run my PD all the way down. I put it on a charger once a week, and use it when I'm biking or doing other active stuff. So some weeks it's down to 80%, some down to 55%, with 20 - 40 hours of use.
I don't use 'demanding' head/earphones (and I never listen at high volume), so I can't say much about power -- all three drive all of my transducers at 25 - 35% of max volume.
As far as SQ, if you look at some of the X5iii reviews, you'll see several comparisons between X5 and Opus, authored by respected Head-Fi members. I will only say that I find the X5iii to be in the same ballpark as the Opus. I perceive its biggest weakness to be a 'shallow' soundstage, and I think the Opus was better in this area. However, I do think the X5 soundstage is better via balanced out. X5iii is slightly warm of neutral, while the Opus is probably slightly less warm, but certainly not 'analytical/bright'. PD is maybe not quite as detailed, and similarly 'just warm of neutral'. One feature of the PD is the EQ, which (as in all Cowon players) is very good. Allows me to use a variety of IEMs and get close to my preferred sound sig.
Hope this helps.