diff --git a/auto_remove_redlight.py b/auto_remove_redlight.py
index 84902d9..d119a99 100644
--- a/auto_remove_redlight.py
+++ b/auto_remove_redlight.py
@@ -496,7 +496,9 @@ def _audio_filter_chain() -> List[str]:
     if LOWPASS:
         chain.append(f"lowpass=f={int(LOWPASS_HZ)}")   # 低通 (Lowpass)
     if HARD_LIMITER:
-        chain.append("alimiter=limit=0.95")            # 強制壓限 (Hard Limiter)
+        # 強制壓限 (Hard Limiter): limit=0.95 → 峰值天花板約 -0.45dBFS;
+        # level=disabled 關掉「壓限後自動回補到 0dB」,才能真正留下 headroom 防破音
+        chain.append("alimiter=limit=0.95:level=disabled")
     return chain