Reference to Visualization Technique in Ritual

[Meletiros]

776 ½ 3rd Ed., pp.110 "There are further steps, taught in some of the esoteric schools, by which this visualization technique is further empowered. In particular, the seed of this magical suggestion must be planted deeply within the matrix of subconscious mind. (Your meditative receptivity naturally assists this.)"

Does "Matrix" refer to Binah?
How can this visualization technique be further empowered?

[Jim Eshelman]

Does "Matrix" refer to Binah?

No. If you're going to treat it sephirothically, "matrix of subconscious mind" is Yesod.

How can this visualization technique be further empowered?

By further steps, taught (usually under obligation) in some esoteric schools.