05/26/2026
What does active isolation actually change?
Neil Gader and Robert Harley spent time with the Seismion Reactio 2 to find out, and their findings appear in the April 2026 issue of The Absolute Sound.
The Reactio 2 isn't passive. It measures vibration in real time across every axis a component can move in, then generates equal and opposite forces to cancel it. The result, according to Harley: a wider and deeper soundstage, lower noise floor, sharper transient detail, and a tangible sense of air around each instrument.
Harley's closing line in his commentary says it plainly: "It doesn't happen too often in my line of work that I grieve the return of a review sample, but that was my reaction as the Seismion Reactio 2 went out the door."
Issue 370, page 92 https://www.theabsolutesound.com/?r3d=tas-issue-370-april-2026
