€ 45
Delivery1 day
Returns30-day free returns
Koss Porta Pro
Their type or too few of their facts are known yet, so they are not in our ranking.
Before you buy, compare it with 2 recommended alternatives
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 Koss Porta Pro Best on 1 fact | Higher score, 48% dearer JBL Live 670NC Best on 1 fact | Higher score, 89% dearer Marshall Major V | |
|---|---|---|---|
| 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 | € 45bol.com best | € 67Amazon.nl | € 85Amazon.nl |
| 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 | – | – | ★ 4.0 · 2 reviews |
| 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 | None |
| 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
| – | 50 h | – |
| What the headphones or one earbud weigh. Lighter is more comfortable for hours at a time. In this comparisonWhen it matters
When it matters less
Source
| – | 219 g | 186 g |
| 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 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, AAC, LC3 |
| 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.
Prices per shop
On 1 November 2026 the lowest price for the Koss Porta Pro is € 45 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.
€ 67
Delivery1 day
Returns30-day free returns
At the same price, a shop in your own country comes first, then a shop selling its own stock before a marketplace seller, then the shorter delivery time, then free returns and the longer return window. Commission never counts.
* 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.
Price history
Lowest price per day Tap a shop to hide or show its line.
Follow price changes via RSS. A feed reader (RSS app) shows a new entry at every change, with no e-mail address needed.
Lowest since 1 Nov€ 45
Highest since 1 Nov€ 67
Price drops since 1 Nov0no drop seen yet
Koss Porta Pro specifications
The numbers that matter first, then every fact by group. As published by the maker or the shop we read it from.
Build and fit 7 facts
- Form factor
Source: koss.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.
- On-ear
- True wireless
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.
- no
- Wireless
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.
- no
- Wired connection
Source: koss.com · checked on 1 Nov
The plug for a cable, so you can also listen wired, for instance on a plane or with a battery that has run out.
- 3.5 mm jack
- Audio over USB-C
Source: assumed, not named by the maker · checked on 1 Nov
They play sound over a USB-C cable, straight from a phone or a laptop. On this model: Assumed, not a stated fact: the maker's full specification does not name it, so we take it as no.
- no (assumed)
- Driver type
Source: koss.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.
- Dynamic
- Foldable
33 of the 33 models we track have this.
Source: koss.com · checked on 1 Nov
They fold up to take less room in a bag.
- yes
Sound 6 facts
- Lowest frequency
Among the models we track
15 Hz on this model
Lowest
4 Hz Highest
50 Hz Middle
20 HzLower than 56 of the 104 models we track.
Source: koss.com · checked on 1 Nov
The lowest tone the maker says they play. It says little about how the bass actually sounds.
- 15 Hz
- Highest frequency
Among the models we track
25,000 Hz on this model
Lowest
16,000 Hz Highest
80,000 Hz Middle
29,000 HzLower than 54 of the 104 models we track.
Source: koss.com · checked on 1 Nov
The highest tone the maker says they play. Adult hearing stops well below most figures.
- 25,000 Hz
- Impedance
Among the models we track
60 Ω on this model
Lowest
15 Ω Highest
520 Ω Middle
32 ΩHigher than 59 of the 75 models we track.
Source: koss.com · checked on 1 Nov
The electrical resistance. Wired headphones with a high impedance need an amplifier to play loud enough.
- 60 Ω
- Sensitivity
Among the models we track
101 dB SPL on this model
Lowest
91 dB SPL Highest
122 dB SPL Middle
100 dB SPLHigher than 31 of the 58 models we track.
Source: koss.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.
- 101 dB SPL
- Equaliser in the app
Source: assumed, not named by the maker · checked on 1 Nov
You can adjust bass and treble in the maker’s app. On this model: Assumed, not a stated fact: the maker's full specification does not name it, so we take it as no.
- no (assumed)
- Spatial audio
Source: assumed, not named by the maker · checked on 1 Nov
Sound that seems to come from around you rather than from inside your head. On this model: Assumed, not a stated fact: the maker's full specification does not name it, so we take it as no.
- no (assumed)
Noise cancelling 1 fact
- Active noise cancelling
When it matters
- Flights, trains and open-plan offices.
- A daily commute in traffic.
When it matters less
- Listening at home in a quiet room.
Source: assumed, not named by the maker · checked on 1 Nov
How the headphones cancel outside noise with microphones. Hybrid uses microphones outside and inside the cup, adaptive also adjusts to the sound around you. On this model: Assumed, not a stated fact: the maker's full specification does not name it, so we take it as no.
- None (assumed)
Wireless 1 fact
- Made for
Source: derived, no source of its own · checked on 1 Nov
Whose phones the headphones are made for. Some features, such as one-tap pairing or spatial audio, work only with that maker’s phones.
- Any phone
Sources: koss.com