The Simgot EW300 is 28Ω with a sensitivity of 105.5 dB/mW, which is 121.0 dB/V. To reach 100 dB SPL — genuinely loud, louder than most people listen — it needs 0.28 mW, or 89 mV across the drivers.
That puts it in the easy category. A phone, a laptop headphone jack or the cheapest USB dongle will drive it to painful levels. Of the 280 sources in the database, 280 have at least 10 dB of headroom and another 0 have enough. The cheapest portable source that does the job is the Apple USB-C dongle (US) at $9.
Sensitivity here is in dB per milliwatt. Why the unit matters.
Simgot, as the shop reproduces it, publishes this as 121 dB/Vrms (@1kHz, silver steel tube + red silicone ring) — a figure per volt, not per milliwatt. At 28Ω the two differ by 15.5 dB, so the 105.5 dB/mW above is that published number converted, not a different measurement.
This is the conversion that online calculators skip. Quote the per-volt number as if it were per-milliwatt and this headphone looks 16 dB easier to drive than it is — which is roughly the difference between a dongle being enough and not being enough.
Simgot, as the shop reproduces it, prints the impedance as 28Ω±15% (@1kHz), not as a bare number. Everything on this page is calculated with the nominal 28Ω, and the rest of that line is quoted here rather than tidied away, because how a figure is qualified is part of the specification too.
One caveat about the source. Almost everything in this database comes from a document the maker published. This entry does not: the figures above stand on someone else's product page — Linsoul, a Chinese-audio retailer — and not on any page Simgot publishes. Shops usually copy the factory table faithfully and this one may well be exact — but a shop can also carry an old revision, and if Simgot changes the number there is nothing here that would notice. It is the weakest provenance on this site, which is why it is written on the page rather than left in a footnote.
Simgot does publish specifications, but only on the Chinese pages of its own site and only for part of the catalogue: the EM10 and SuperMix 4 pages exist with an empty specification panel, and the EA500LM and EW300 are not listed at all. The English and Japanese versions of every page render that panel empty.
Source: linsoul.com. How this data was built.
There is a page, and it cannot be opened. Simgot still has one for the Simgot EW300, but simgot.com does not answer. Four of its hostnames were tried from two different networks — the site refuses the connection rather than returning a page, and its robots file could not be read either. Simgot sells through dealers whose listings carry a frequency range, but a dealer listing is not the maker’s document and this site does not record one as if it were (checked 2026-10-02).
So this is not a maker that prints nothing. It is a model whose sheet cannot be checked, and the two are different enough that this site counts them separately: of the 578 models checked so far, 490 carry a maker-printed range, 47 have a maker page that prints none, and 31 — this one among them — have no maker page that can be read at all.
Addresses tried: https://www.simgot.com/, https://simgot.com/, https://en.simgot.com/, https://www.simgot.com/en/.
Only what the maker printed; maker by maker.
| Level | What it is | Power | Voltage | Current |
|---|---|---|---|---|
| 85 dB SPL | quiet background listening | 0.01 mW | 16 mV | 0.6 mA |
| 95 dB SPL | normal listening | 0.09 mW | 50 mV | 1.8 mA |
| 100 dB SPL | loud listening | 0.28 mW | 89 mV | 3.2 mA |
| 105 dB SPL | very loud | 0.89 mW | 0.16 V | 5.6 mA |
| 110 dB SPL | peaks on dynamic music | 2.8 mW | 0.28 V | 10.0 mA |
Most people listen between 75 and 85 dB; the 100 dB row leaves room for peaks.
The 15 cheapest of the 280 sources here that reach 100 dB SPL into 28Ω with at least 10 dB of headroom and no known hiss or output-impedance problem with these headphones. All 280 sources, judged for these headphones.
| Source | Type | Price | Power into 28Ω | Headroom | Verdict |
|---|---|---|---|---|---|
| FiiO SnowSky Tiny A | USB dongle | $22 | 35 mW | +21 dB | Comfortable |
| FiiO SnowSky Tiny B | USB dongle | $22 | 39 mW | +21 dB | Comfortable |
| Tanchjim Stargate II | USB dongle | $40 | 75 mW | +24 dB | Comfortable |
| ddHiFi TC35AL | USB dongle | $46 | 184 mW | +28 dB | Comfortable |
| ddHiFi TC35Air | USB dongle | $46 | 184 mW | +28 dB | Comfortable |
| Fosi Audio N3 | Bluetooth receiver | $50 | 121 mW | +26 dB | Comfortable |
| Hidizs SD2 | USB dongle | $50 | 61 mW | +23 dB | Comfortable |
| iFi GO link | USB dongle | $59 | 61 mW | +23 dB | Comfortable |
| Kiwi Ears Allegro Pro | USB dongle | $60 | 60 mW | +23 dB | Comfortable |
| ddHiFi TC35Pro (Mountain2) | USB dongle | $66 | 57 mW | +23 dB | Comfortable |
| DUNU DTC 480 | USB dongle | $70 | 57 mW | +23 dB | Comfortable |
| EPZ TP35 Pro | USB dongle | $70 | 98 mW | +25 dB | Comfortable |
| Aiyima A2 Pro | desktop DAC/amp | $75 | 131 mW | +27 dB | Comfortable |
| ddHiFi TC35Pro (Eye2) | USB dongle | $76 | 57 mW | +23 dB | Comfortable |
| ddHiFi TC44 Pro E2 | USB dongle | $99 | 219 mW | +29 dB | Comfortable |
Hiss. At 121.0 dB/V these are sensitive enough to reveal a source's own noise floor. The noisiest source in the database, the Schiit Mjolnir 3, would put its hiss at roughly 29 dB SPL in these headphones — clearly audible in quiet passages. Check your own source.
Output impedance. At 28Ω these want a source output impedance below 3.50Ω to satisfy the one-eighth rule; 35 of the 192 sources that publish one miss it. Check yours here.
26Ω · 103.1 dB/mW · Easy
See requirements →21Ω · 106.2 dB/mW · Easy
See requirements →16Ω · 123.0 dB · Easy
See requirements →30Ω · 105.8 dB/mW · Easy
See requirements →25Ω · 105.0 dB · Easy
See requirements →5Ω · 98.0 dB/mW · Easy
See requirements →Compared with its stablemates: vs EA500 · vs EA500LM · vs EM10 · vs SuperMix 4.