Their type or too few of their facts are known yet, so they are not in our ranking.
Beside them, two models on sale today that come closest on score and price, of the same type where we have them.
Green is the best of these 3, also when they share the lead.
| This model Truthear Zero Red | Higher score, 19% cheaper EarFun Air 2 Best on 1 fact | Higher score, 6% cheaper Soundcore P40i Best on 1 fact | |
|---|---|---|---|
| Most important facts | |||
| The lowest price today at a shop that delivers to you, delivery included. A price with an asterisk comes from a shop abroad, and its delivery cost is our own estimate. Lowest price | € 61bol.com | € 49bol.com best | € 58bol.com |
| Our own score out of 10: 60% the maker’s facts and 40% shop ratings. Price does not count. Score | not in our ranking | best | |
| The average of the stars buyers give at the shops, with the number of reviews behind it. We only compare it from 20 reviews. Customer rating | – | – | – |
| How the headphones cancel outside noise with microphones. Hybrid uses microphones outside and inside the cup, adaptive also adjusts to the sound around you. When it matters
When it matters less
Source
| – | None (assumed) | Adaptive |
| How long the headphones or the earbuds play on one charge with noise cancelling on, as the maker states it. When it matters
When it matters less
Source
| – | – | 10 h |
| The Bluetooth version. A newer one connects more steadily and uses less power, if the phone has it too. In this comparisonSource
| – | 5.3 | 5.3 |
| How well they resist water and dust, as the IP code states. IPX4 survives sweat and rain, IPX7 a short dip in water. When it matters
When it matters less
Source
| – | IPX7 | IPX5 |
| How the sound is packed for Bluetooth. AAC suits iPhones, aptX and LDAC carry more detail from Android phones that support them. When it matters
When it matters less
Source
| – | SBC, LDAC | – |
| Connected to two devices at once, such as a phone and a laptop, and switching by itself to the one that plays. When it matters
When it matters less
Source
| – | yes | yes |
Facts as the maker states them. A dash means the maker does not name it. Each model’s page gives the source of every fact. Noise is the maker’s own figure, so we do not judge it, and a customer rating only counts from 20 reviews.
On 1 November 2026 the lowest price for the Truthear Zero Red is € 61 at bol.com, delivery to the Netherlands included.
All prices include VAT and delivery to the Netherlands. We may earn a commission when you buy through these links. It never changes our ranking.
sold by a third-party seller * Shop abroad: delivery and VAT are our estimate. Returns are the shop's own terms, a marketplace seller sets its own. Tap a return term to read the shop's policy. Let your browser translate it.
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The numbers that matter first, then every fact by group. As published by the maker or the shop we read it from.
Source: truthear.com · checked on 1 Nov
How the headphones sit: over the ear, on the ear, in the ear canal, in the outer ear, beside the ear or on the cheekbone.
96 of the 184 models we track have this.
Source: derived, no source of its own · checked on 1 Nov
Two separate earbuds with no wire between them, charged in a case.
153 of the 184 models we track have this.
Source: derived, no source of its own · checked on 1 Nov
They play over Bluetooth, without a cable to the phone.
Source: truthear.com · checked on 1 Nov
The kind of speaker inside. Dynamic drivers are the most common. Planar and electrostatic ones are mostly found in expensive headphones for home listening.
10 mm on this model
Lowest
4.7 mm Highest
56 mm Middle
12 mm
Lower than 83 of the 107 models we track.
Source: truthear.com · checked on 1 Nov
The diameter of the speaker inside. A bigger driver does not by itself mean better sound.
20 Hz on this model
Lowest
4 Hz Highest
50 Hz Middle
20 Hz
Higher than 51 of the 104 models we track.
Source: truthear.com · checked on 1 Nov
The lowest tone the maker says they play. It says little about how the bass actually sounds.
40,500 Hz on this model
Lowest
16,000 Hz Highest
80,000 Hz Middle
29,000 Hz
Higher than 96 of the 104 models we track.
Source: truthear.com · checked on 1 Nov
The highest tone the maker says they play. Adult hearing stops well below most figures.
17.5 Ω on this model
Lowest
15 Ω Highest
520 Ω Middle
32 Ω
Lower than 49 of the 75 models we track.
Source: truthear.com · checked on 1 Nov
The electrical resistance. Wired headphones with a high impedance need an amplifier to play loud enough.
117.5 dB SPL on this model
Lowest
91 dB SPL Highest
122 dB SPL Middle
100 dB SPL
Higher than 54 of the 58 models we track.
Source: truthear.com · checked on 1 Nov
How loud they play on a given signal. A higher figure plays louder from a weak source, such as a phone.
Sources: truthear.com
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