So I've had some decent hours listening on my SE846 with bass filters and the 300 has come in to it's own as my brain has got used to less bass but more detail and clarity vs the Onkyo HA200. I initially was listening using tidal hifi and some iTunes matched files via usb. I then bought some CDs and have ripped to FLAC using Max.
Being a newbie I'm lacking the experience and lingo to give much insight into sound differences but from a layman point of view the overall sound is more spacious, cleaner and far more pleasant than the HA200, which initially I missed on making the switch. Plugging the 200 back in the difference is subtly staggering. The base is less 'wow' but more balanced allowing the rest of the music to shine through.
Obviously the HA200 is a plug to source unit and the HA300 has the micro SD capacity. I've therefore given my iPhone a new lease of battery life and don't miss the sodding elastic bands and cables. The unit is bigger but I managed phone in one and 300 in the other no problem.
Battery life is basically the same for both in terms of what I'm noticing. Neither charges an iPhone 5 or iPad, however I got my old man a 200 and it charges his android. The HA300 doesn't charge when plugged into my macbook air 2012 via usb - mini usb but the HA200 does. The power charger works from both pc and mains into a standard usb plug. Takes a couple of hours.
You can load up the micro SD by plugging the unit in with it installed or using the adaptor. I tried the Onkyo HF player for windows and mac - totally crap, doesn't recognise the device and no response from Onkyo support so will be the last bit of kit I get from them. I'm using max to rip and then drag the FLACs in.
The SD card sits on the side below the scrolling wheel. There's also a lock button which freezes the front buttons and wheel but not the volume - which can be suddenly turned up when putting in one's pocket. However the very sensible volume safety function (3 different settings) as described before provided protection against this, as they get mega loud!
In terms of controlling your sources, its done on a hierarchy system with USB input trumping all others I believe so you essentially only have what you are listening to plugged in with no switch (like the 200 has).
The media player caused me some probs initially with my existing iTunes library, splitting albums and not reading genres etc, however tagger fixed this before I decided to start my monthly CD purchase after quitting the cigs again (10 years = a nice tidy collection sitting 10000 miles away in the UK!) I'm using a program called max which is native for mac and that reads artist, album and tracks perfectly on the onkyo. As I get more into this I'll look into programs like EAC but to be honest the four albums I did today sound fantastic, trumping Tidal hifi in my opinion through the HA300.
The equaliser on the 300 has 5 settings: classical, pops, rock, jazz and off. I quite like the rock but tend to go with off.
Navigating tunes is quite easy ONLY if the tags are sorted or you're happy just to load and play as TRANCE says. I find the wheel a massive pain in the ass personally and would prefer more control in terms of menu sublayers using the nice front buttons.
Overall I'm glad I got it but not sure I would pay the full whack for it in terms of added
functionality over using a straight up amp/dac with my phone/ipad. Sound wise it sounds amazing to my ears, however I hope more seasoned guys break that bit down as I have limited experiences of different kit to compare it to!