You cannot manually configure the cache on the Vixo2, it is not a setting you are given access to. However, channel freezing is almost always internet connection related. If you get constant freezing you might want to switch to Ethernet cable (if you are on wifi). Boosting your connection by getting closer to the router/modem also helps. Sometimes resetting your modem/router also help increase your internet speed if you have heavy internet usage. If you have low internet speeds that also is sometimes a problem. It rarely is ever a problem with the box itself, many users enjoy the live tv with the same device without problems. Another thing to look out for is the actual channel. If you are saying only some channels are freezing then it might just be the server. The stream is only as good as it is broadcasted and sometimes the live tv stream messes up and not you. Sometimes just reconnecting to the same channel will fix the frozen image (if it stays too long).
