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Koss Pro4s

Koss Pro4s
Koss Pro4sKoss Pro4sKoss Pro4sKoss Pro4sKoss Pro4sKoss Pro4s
alaScore 84

18 reviews

Jun, 2025

alaTest has collected and analyzed 18 reviews of Koss Pro4s. The average rating for this product is 4.0/5, compared to an average rating of 4.0/5 for other Headphones for all reviews. Reviewers really like the usability and bass quality. The price and design are also appreciated. The portability and durability get mixed reviews. Some have doubts about the soundstage and mids quality.

sound, design, price, bass quality, usability

mids quality, soundstage

We analyzed user and expert ratings, product age and more factors. Compared to other Headphones the Koss Pro4s is awarded an overall alaScore™ of 84/100 = Very good quality.

Review analysis

(Based on 18 reviews)

Expert Reviews  

User Reviews  

Review Ratings

  (40% of reviews)
Show all 5 star reviews   (27% of reviews)
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Show all 3 star reviews   (13% of reviews)
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bass quality
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portability
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usability
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mids quality
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Showing 13 review(s)

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Showing 1 - 13 of 13 Show Reviews: in English | in other languages (5)

Consumer review (amazon.co.uk)

Amazon.co.uk review summary for Koss Pro4s

 

alaTest has collected and analyzed 7 user reviews of Koss Pro4s from Amazon.co.uk. The average user rating for this product is 4.0/5, compared to an average user rating of 4.0/5 for other Headphones on Amazon.co.uk. Reviewers are impressed by the portability. The sound also gets good opinions, but there are some critical opinions about the bass quality and durability.

price, sound, portability

durability, bass quality

71% of the reviews on Amazon.co.uk give this product a positive rating.

Jun, 2025

Expert review by : Cameron Faulkner (techradar.com)

Koss Pro4S review

 

Studio headphones with a knack for balanced sound and affordability

Sleek design ; Affordable ; Balanced sound delivery

Inconsistent performance ; Short coiled cable

It's hard to to beat the Koss Pro4S when it comes to sheer affordability in the over-ear studio headphones market, but is it the best choice for everyone? Nope. In fact, only lovers of certain genres need apply.

Feb, 2015
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Expert review by : Justin Yu (cnet.co.uk)

Koss Pro4S review: Lightweight studio monitor headphones for professionals and audiophiles

 

The Pro4S is an excellent studio monitor headphone that musicians and audiophiles will appreciate for its neutral sound design, forward-thinking features, and a generous warranty that guarantees no-question replacements for life.

The Koss Pro4S headphones have a closed-back design that attenuates outside noise while keeping sound leaks at bay, while the memory foam ear cups keep them comfortably seated on your head. They come with a detachable cable that plugs into jacks on...

Their naturally even register may weaken the "edge" of some artificially-produced songs. The headphones come with a coiled cable, but it's missing a microphone and an in-line remote control for changing tracks and adjusting volume through a smartphone.

Although we regret that Koss doesn't include a remote on the cable, the Pro4S is an excellent studio monitor headphone that audiophiles will appreciate for its neutral sound design, forward-thinking features and generous warranty that guarantees...

Apr, 2015
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Expert review by (cnet.com)

Koss PRO 4S

 

Koss is up against tough competition in this marketplace since many of the current best-selling "professional" headphone monitors like the Sennheiser HD280 and the Sony MDR-7506 have remained in the winner's circle for more than a decade, but the Pro4S...

The Koss Pro4S headphones have a closed-back design that attenuates outside noise while keeping sound leaks at bay, while the memory foam ear cups keep them comfortably seated on your head. They come with a detachable cable that plugs into jacks on...

Their naturally even register may weaken the "edge" of some artificially-produced songs. The headphones come with a coiled cable, but it's missing a microphone and an in-line remote control for changing tracks and adjusting volume through a smartphone.

Although we regret that Koss doesn't include a remote on the cable, the Pro4S is an excellent studio monitor headphone that audiophiles will appreciate for its neutral sound design, forward-thinking features and generous warranty that guarantees...

Apr, 2015
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Expert review by : Justin Yu (cnet.com.au)

Koss Pro4S review: Lightweight studio monitor headphones for professionals and audiophiles

 

The Pro4S is an excellent studio monitor headphone that musicians and audiophiles will appreciate for its neutral sound design, forward-thinking features, and a generous warranty that guarantees no-question replacements for life.

The Koss Pro4S headphones have a closed-back design that attenuates outside noise while keeping sound leaks at bay, while the memory foam ear cups keep them comfortably seated on your head. They come with a detachable cable that plugs into jacks on...

Their naturally even register may weaken the "edge" of some artificially-produced songs. The headphones come with a coiled cable, but it's missing a microphone and an in-line remote control for changing tracks and adjusting volume through a smartphone.

Although we regret that Koss doesn't include a remote on the cable, the Pro4S is an excellent studio monitor headphone that audiophiles will appreciate for its neutral sound design, forward-thinking features and generous warranty that guarantees...

Apr, 2015
Read the full review

Expert review by : Steve Guttenberg (soundandvision.com)

Koss Pro4S Headphone Review

 

Performance Build Quality Comfort Value

Koss was founded in 1958, so it’s as old-school American hi-fi as you can get, and I’d bet lots of older audiophiles have fond memories of their Pro4AA headphones from back in the day. Koss still makes that headphone, and sound-wise, it’s about as...

Jun, 2015
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Consumer review (head-fi.org)

Koss, the second comming

 

I just got these in from Koss today and initial impressions are incredibly positive. These are Koss' second best headphone available that I have tried (DJ100, DJ200, PRO4AA, PRO4AAT, PRO4AAAT, and MV1). The overall tone of these is warm, detailed, and...

Detail/clarity, warm and smooth sound, punchy and tight bass

Soundstage is lacking

May, 2015
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Price comparison for Koss Pro4s