The unit suffers from "zipper noise"....if you turn the volume up or down very quickly, you get minor crackling sounds. Nothing damaging, just a small annoyance.
Some people suffer from an audible noise floor when using analog inputs and/or the Ai-net connection. Not all, but some. This can be fixed some using certain methods.
Some people have had the unit lose the settings after disconnecting power. This shouldn't happen...but it periodically does. So write down all of your settings.
Are there any differences in lets say firmware dates and such?
Nope.
Would you think its worth it to buy one?
I have the DVA-9860 connected to the H701 in my vehicle right now //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
Out of the "bugs" I mentioned above, the only one I've personally experienced is the zipper noise.
I'm running optical now, so the noise floor isn't even a possible issue for me right now. But even when I was only using the Ai-net connection and the analog inputs, I did not have the noise floor issue.
And I've yet to have the unit lose it's settings after disconnecting power.
Sorry, its just that someone is trying to sell me one for a decent price.
If the price is good, I think you would be unwise to pass it up.
One of the best processors on the market, feature wise. Nothings perfect, and like most other products it has it's small problems (mentioned above). But overall, it's an excellent, excellent piece of equipment.