Your system is not what I would call a typical SET setup. The amp is a parallel 845 producing 30w into a fairly inefficient speaker. Most of the information that you are reading regarding higher gauged cables etc. are based on flea (2A3) to low (300B) power single ended triodes driving high efficiency speakers. I would think that “traditional” speaker cables would work best.
I have not heard your combination, therefore, I would use a company like the Cable Company and take advantage of their trial program before I purchase.
I have not heard your combination, therefore, I would use a company like the Cable Company and take advantage of their trial program before I purchase.