Superlux: what they publish

In this database2 headphones
Figures from their own material1 of 2
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This page does not review anything Superlux makes. It counts one thing: how much of what this database says about their products came out of their own documents, and how much had to be worked out or left blank.

Where each sensitivity figure came from

ModelImpedanceSensitivitySource of the figure
HD 668B56 Ω98.0 dB/mWMaker disagrees with itself
HD 681 EVO32 Ω98.0 dB/mWPublished per mW

Impedance is almost always printed. Sensitivity is the one that goes wrong, because a decibel figure means two very different things depending on whether it is per milliwatt or per volt — about five decibels apart at 300 Ω and eighteen at 16 Ω. The conversion is here.

  • Published per mW — 1: the maker prints a decibel figure per milliwatt, which is what the database stores
  • Maker disagrees with itself — 1: the maker publishes figures that cannot all be true at once