Everything behind this site is available as a file. 578 headphones and 280 amplifiers, dongles, players and receivers, in CSV and JSON, free to use with attribution.
The reason this is worth downloading rather than scraping is the provenance columns. Every
sensitivity figure carries the value and unit the manufacturer actually printed alongside the
converted one, and a basis column saying which of the two you are looking at. Every
amplifier power figure carries a basis per load: published at that exact load, derived from
neighbouring ones, an upper bound from a voltage rating, or not yet traced to a document. No
other dataset of this kind tells you that, because assembling it means admitting how much of the
manufacturer data is incomplete.
578 models · 119 kB · impedance, sensitivity in both units, what the maker published, and the source
Download ↓280 sources · 69 kB · power into four loads with a basis for each, output impedance and noise
Download ↓289 kB · same data with the licence and method note in the header
Download ↓181 kB · same data with the licence and method note in the header
Download ↓156 makers · 12 kB · how much of the above each manufacturer published themselves, counted — also as JSON and readable at /brands/
Download ↓For headphones, basis takes one of these values:
| Value | Models | Meaning |
|---|---|---|
published-per-mW | 253 | the maker printed this figure per milliwatt; nothing was done to it |
converted-from-per-volt | 122 | the maker printed it per volt; converted with the published impedance |
converted-from-stated-voltage | 17 | the maker printed an SPL at one specific drive voltage (11.84 mV, 0.179 V, 0 dBu); converted with the published impedance |
unit-not-stated-by-maker | 148 | the maker printed a bare decibel figure with no reference; the value is as printed and may be either reading |
not-published-by-maker | 32 | no sensitivity figure exists in the maker's documentation; the value carried over from the material this database was first built from |
maker-document-unreachable | 5 | the maker's own document for this model could not be reached — the page is gone, or the site serves an invalid certificate — so the value is untraced rather than unpublished |
maker-reference-inconsistent | 1 | the maker printed a reference its own datasheet contradicts, so the figure is recorded as printed and flagged rather than converted |
For sources, each load has its own basis: published, interpolated,
extrapolated, source-impedance, voltage-bound or
unverified. Across the four standard loads that works out to 346 published
figures, 734 derived ones and 40 not yet traced to a document. The
method page explains each.
Creative Commons Attribution 4.0. Use it in a spreadsheet, a calculator, an app, a video, a paper — commercial use included. The only condition is that you say where it came from.
The attribution line to use:
Data: The Phone Path (thephonepath.com), CC BY 4.0
Two honest warnings before you build on it. First, these are manufacturer claims,
not measurements — a maker's own figure is a claim, and independent measurement is
better than any of this. Second, the figures marked unit-not-stated-by-maker are
genuinely ambiguous: if your use is sensitive to a 15 dB error, filter them out rather than
trusting them.
If you find a figure that disagrees with a manufacturer document, the document wins and I want to know — the address is in the footer. The files are rebuilt whenever the database changes.