P-SB7 vs P-SB11 vs PSB7-PRO: Which Spirit Box Is Right for You?

Gary Galka

Published on: 06/07/2026

A plain comparison of the three Pro Measure spirit boxes: the classic P-SB7, the dual-sweep P-SB11, and the flagship PSB7-PRO. Which one fits a beginner, an enthusiast, and a serious researcher.

Paranormal Investigation Tools

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What Is Frequency Overlap? How the PSB7-PRO Creates Clustered Hot Spots

Gary Galka

Published on: 06/07/2026

Frequency overlap is the technique behind the PSB7-PRO Spirit Box. Gary Galka explains adjustable frequency steps, clustered hot spots, and why they give responses more room to form.

Technology & Innovation

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