Building a decent sound room

Learn from Paul McGowan in building a music room

I will conclude the following watching these vids :

1. Golden ratio room dimension
2. Double wall
3. 1/3 positioning to delay reflected sound
4. Helmholtz resonator to tame bass peaks and valleys
5. Long interconnects, short speaker cables  (I am not sure about that)

Things that I do not like :

1. Unsymmetrical side walls
2. The rocking chair

Anyone owns Infinity IRS V will be out to make a statement!