During my backpacking days (many decades ago) in your country as a youth in search of truth, I stumbled upon a very old temple..Enormous structural stone pillars carved out of solid rock that played do re mi fa.... if you tapped on em (mind boggling). The ancient inhabitants of that land seemed to know something about Acoustics and some related matters that modern man has lost forever possibly.
Audiophiles are very scared of basic construction/remodeling in general. When the spouse is visiting the in-laws, just get a contractor, tear a wall and convert the 14 ft to 20 ft. The sonics can go up a notch from there.