Marigo Labs makes VTS tuning dots to attach in proximity to corners of windows, as well as other types for every part of a system, and room.
Can check the website, marigoaudio.com
Also, can email Ron Hedrich at the website. He creates the Marigo Labs products.
Can check the website, marigoaudio.com
Also, can email Ron Hedrich at the website. He creates the Marigo Labs products.