In Reply to: Where does that resonance come from? posted by 13th Duke of Wymbourne on February 12, 2017 at 14:54:18:
virtually all full range planars have to address an inherent diaphragm resonance in some way or another. Acoustat's approach was to glue felt sheets across approximately one-third the rear panel area.
Sound Lab takes a completely different approach. The single sheet diaphragm is affixed to a grid of flat cells having a progressively different height thus distributing and canceling the resonance.
I think Quad goes for a felt damping approach similar to Acoustat. If the felt gets loose, then the resonance becomes obvious.
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Follow Ups
- Understand that - E-Stat 13:32:50 02/13/17 (0)