Hello I have just completed a 12x16x8 foot room for a dedicated 2 channel audio room. I am looking to get either ESL X’s or the 9’s for this room. There are VTL tube amps for power, and both analog and digital sources. I would like to know what and where to apply some acoustic treatment for the walls for this kind of speaker. This would be a work in progress and also where do I start first, the side walls then the front and corners then the back walls? Thank you.