Complete construction plan and guide to build Sky Tower quadratic diffuser DIY for audiophile

This is a real sound diffuser construction plan. 

It will add more definition and separation to your mid and high frequency between 840Hz - 3400Hz.

The dimensions will be 490 x 490 x 200mm.

Weight: 15kg.

You will be provided with the information about what tools you need. What materials. How to cut and assemble, paint and make the diffuser fireproof. How to install on the wall secure even in case of earthquake. And where to install in your room.