FiiO EH13 measurments
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FiiO EH13 measurments
Device Mini DSP H.E.A.R.S

FiiO EH13 Frequency Response Analysis: ANC On vs ANC Off
The graph shows two frequency response measurements of the FiiO EH13:
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Red curve: ANC Off
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Green curve: ANC On
This comparison is useful because it shows not only the general tuning of the headphones, but also how the tonal balance changes when active noise cancelling is enabled.
Overall tuning
The FiiO EH13 are not tuned as strictly neutral studio headphones. Their response is closer to a modern consumer-friendly tuning: elevated bass, a relaxed upper-midrange, and some extra energy in the treble region to create a sense of detail.
In simple terms, these headphones are tuned for enjoyment rather than absolute neutrality.
They sound full, comfortable and easy to listen to, with enough bass weight to make modern music engaging.
Bass response
From the low bass up to around 200 Hz, the response remains relatively elevated. This confirms the subjective impression of a clear bass boost.
The important point is that the low bass is present, not only the mid-bass. This means the headphones should deliver a sense of depth and weight rather than just a boomy or boxy bass character.
This kind of tuning works well for pop, electronic music, hip-hop, rock and casual listening. However, listeners who prefer a more neutral or reference-style balance may find the bass slightly stronger than necessary.
Lower midrange
Between roughly 200 Hz and 800 Hz, the response gradually slopes downward. This helps prevent the sound from becoming overly thick, muddy or congested.
As a result, even though the EH13 have a noticeable bass lift, the midrange does not appear completely buried under the bass. This is one of the reasons why the headphones can sound clean and surprisingly well separated for their price.
Midrange and vocals
The area between 800 Hz and 2 kHz is important for vocal body, instrument tone and overall naturalness.
With ANC off, the response looks somewhat smoother in this region. With ANC on, the green curve shows more variation, including a stronger dip and then a rise toward the upper mids.
This indicates that enabling ANC does not only reduce outside noise — it also slightly changes the tonal balance of the headphones. This is quite common in Bluetooth headphones with active noise cancelling.
Upper mids: 2–4 kHz
There is a noticeable dip around the 3–4 kHz region.
This area is very important for vocal presence, attack and forwardness. A dip here usually makes the sound less aggressive and less fatiguing. Vocals and instruments may feel a little more relaxed or slightly further away.
This helps explain why the EH13 can sound comfortable and non-irritating, even during longer listening sessions. At the same time, some listeners may miss a bit of immediacy or bite in vocals and guitars.
Treble region
After the upper-midrange dip, the response rises again around the 5–6 kHz area. This can add perceived clarity, articulation and detail.
There are also peaks and dips higher up in the treble, including energy around the 9–10 kHz region. This can contribute to a sense of sparkle and air.
However, treble measurements above 8–10 kHz should always be interpreted carefully. In headphone measurements, this region is highly dependent on fit, seal, positioning on the measurement rig and the listener’s own ear shape.
ANC On vs ANC Off
The graph clearly shows that ANC changes the sound.
With ANC Off, the red curve appears slightly smoother through parts of the midrange.
With ANC On, the green curve changes more noticeably in the midrange and treble. This means the active noise cancelling mode affects not only external noise, but also the headphone’s frequency balance.
Subjectively, ANC may make the bass easier to hear in noisy environments because external low-frequency noise is reduced. However, it can also slightly alter the overall tonal character.
Main conclusion
The measurements match the listening impressions quite well.
The FiiO EH13 have:
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a noticeable bass boost;
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a clean and relatively controlled lower midrange;
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a relaxed upper-midrange;
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enough treble energy to create a sense of detail;
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a tonal balance that changes slightly when ANC is enabled.
These are not neutral reference headphones. They are tuned as enjoyable, modern, consumer-oriented Bluetooth headphones.
For the price, the result is impressive. The EH13 deliver a full, comfortable and surprisingly detailed sound signature, while ANC and passive isolation make them practical for everyday use.
The main takeaway is simple: FiiO EH13 do not replace premium headphones such as Focal Bathys as a luxury product, but they clearly show how good affordable Bluetooth headphones have become.