Tin HiFi: what they publish

In this database4 headphones

Figures from their own material3 of 4

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This page does not review anything Tin HiFi 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.

Headphones

Where each sensitivity figure came from

Model	Impedance	Sensitivity	Source of the figure
C5	9 Ω	98.5 dB/mW	Converted from a stated voltage
T2 Plus	32 Ω	104.0 dB	Unit not stated
T3 Plus	32 Ω	105.0 dB/mW	Converted from a stated voltage
T4 Plus	32 Ω	106.0 dB/mW	Converted from a stated voltage

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.

Converted from a stated voltage — 3: the maker prints a level at a stated drive voltage, converted here to per milliwatt
Unit not stated — 1: the maker prints a decibel figure with no reference unit, so it is shown as printed and flagged rather than quietly converted

In short

What the paperwork adds up to

Most of what this site says about Tin HiFi came from them, with the rest derived and labelled as derived.

The rule used here is the same for every maker and is described on the manufacturer index. Every figure behind it can be opened on the product page it came from, with the document it came from linked.

All 156 manufacturers · What the spec sheets actually say · Download the whole database