Innosilicon did not take ANY preorders on the A2 - it came out as a total suprise with ZERO previous announcements, pretty much unique in the cryptocoin mining industry.
They DID pre-announce their "Farm Boy" units, but I don't remember if they bothered with pre-orders on those.
The investment needed to get a new 14/16nm chip up and running is a TON higher than working with long-established 28nm tech though, which I'm sure is WHY Innosilicon wanted some investment help on that generation.
My ballpark guess is that the A4 will fuel about a doubling of hashrate over the first year after it starts shipping, and a continuing slow increase past that point - but only if Litecoin price stays above the $3 level, and even a bit iffy if it keeps drifting down TO that level. Still shouldn't be hard to manage ROI on an A4 if you have VERY VERY cheap electric, but at 10c/KWH might make ROI difficult-to-impossible (and 10c/KWH is fair bit BELOW the average for the US since the EPA/Obama War On Coal has driven US average electric prices UP quite a bit the last few years).
BIG rant coming up as I have 3 of these in house
http://www.iqair.com/home-air-purifiers/gcmultigas/buy at a cost of 3600 usd and about 1000 a year in filter replacement.
They are better then inhaler medication. In my opinion.
The rant starts belowFuck coal and I don't like Obama. If you understood how much pollution was dumped by the midwest onto the northeast you would not have made the statement.
This entire issue should have never been allowed to happen , but Bush allowed old dirty nasty coal plants a pass on not upgrading their plants to burn clean. Corporate greed kicked in and no plants were retro fitted to burn cleanly . Causing a shit ton of lung disease all preventable if the moron power plants had upgraded their power plants to burn clean.
Having been a life long Asthmatic my research on this is long and deep. BTW I will most likely vote for Trump as part of his plan is to alter the coal industry the correct way. IE clean coal plants. If he was to do just this one act as the next president it would make him a very good president.
Back to mining and away from politics do you have plans to get one of these miners?
@innosilicon give me one to test, over and underclock and I will give you an honest review and measured userdata in return 
. I am running your image on my A2 and it is amazing. 
