The P-SB7 defined the modern spirit box in 2009. The current Rev 8 goes wireless and carries an enhanced FM band with 119 added frequencies. Gary Galka explains what changed and why.
Sweep noise is part of how a spirit box works, but it can bury a response. Gary Galka explains the ANC-Mini, its Hold and Release algorithm, and how to set it up correctly.
The REM-POD generates its own EM field and reacts when something enters it. How radiating-field proximity detection works, and what is new in the Rev3, 2026 Edition.
The APF-D Processor is an Audio Playback Filter for ITC research. How to pause without losing data, rewind in 10-second intervals, slow playback, and filter noise to decipher a response.