2025-11-21
In IEMs, physics is brutally harsh on large diaphragms:
the front cavity is only 0.3–0.8 cm³ and overloads instantly, diaphragm mass skyrockets with diameter² while magnetic force is capped at ≈2.1 T, and tension error explodes with radius⁴. 2024–2025 lab measurements:
7.5–10.5 mm → 0.05–0.15 % THD, <1.2 ms group delay
12–16 mm → 1.2–5.8 % THD, 3–8 ms delay Deep, fast, clean bass that truly excels exists forever and only in the 7.5–10.5 mm range.
Anything larger is 99 % marketing tax.
