You seem to not realise that AKP is well beyond the prototype. The prototype stage was around 5-6 years ago, and ever since they have been moving along a 4 stage process to turn the proof of concept prototype into a finished product in one careful but determined execution. This they have essentially done. All going well AKP will have not just a prototype but a market ready product within a matter of a few months.
One big difference between AKP and WBT is that memory chips tend to sell for significantly less than MEMS chips, that are finished devices in their own right. As far as I am aware AKP has no direct competition for its speaker chip. I look forward to hearing details of the Korean competitor, but I would be surprised if it has a similar device based on DSR.
PS: I also have a meaningful holding in WBT, as well as in TTT, CPV, WATT, MU. I expect AKP will be right up there in terms of value in the not too distant future. I certainly expect similar progress from WBT over the next couple of years.
AKP Price at posting:
$22.09 Sentiment: Buy Disclosure: Held