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  • Koss KPH40 Utility On-Ear Headphones with Detachable Cord System and Ultra Light Design (Stealth Black)

Koss KPH40 Utility On-Ear Headphones with Detachable Cord System and Ultra Light Design (Stealth Black)

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About this item

  • Open back, on-ear design, retro look
  • Super lightweight stainless steel chassis
  • Audiophile Sound Performance
  • Soft foam ear cushions
  • Includes 3.5mm utility cord
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This item: Koss KPH40 Utility On-Ear Headphones with Detachable Cord System and Ultra Light Design (Stealth Black)
¥7,645
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Sold by YMKマルシェ(適格請求書発行事業者) and ships from Amazon Fulfillment.
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YAXI for PORTAPRO (Orange)
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99 pt (8%)
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Popular Brand

Koss

89% positive ratings from 1K+ customers

1K+ recent orders from this brand

Product information

Technical Details

Frequency Response ‎25000 Hz
Headphones Jack ‎3.5 mm Jack
Model Name ‎KPH40 Utility Parent
Connectivity Technology ‎3.5mm, Lightning, USB-C
Wireless Communication Technology ‎Bluetooth
Included Components ‎Headphones, 3.5mm cord
Age Range (Description) ‎Adult
Material ‎Stainless Steel Foam
Recommended Uses For Product ‎Exercising, Running
Control Type ‎Media Control
Cable Feature ‎Detachable
Item Weight ‎0.11 Kilograms
Number of Items ‎1
Batteries Required ‎No
Manufacturer ‎Koss Corporation
Item Model Number ‎KPH40 Utility Parent
Size ‎S
Package Dimensions ‎21.69 x 15.29 x 5.51 cm; 109 g

Additional Information

Item model number KPH40 Utility Parent
ASIN B09KZC94X1
Date First Available November 16, 2021
Customer Reviews
4.4 out of 5 stars
Amazon Bestseller

Warranty & Support

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Product description

The Koss KPH40 Utility On-Ear Headphones are part of the Koss Utility series. A whole new listening experience featuring three new headphones, three cords, and one seamless experience that all work together. No batteries, no audio compromise and no compatibility issues. It's that simple. All Koss Utility Series headphones include a removable 3.5mm standard headphone jack cord. Need more options? Bundle the available USB-C or Lightning utility cord (including inline mic and remote) to connect to your other devices. The Koss Utility series features a removable cord system that provides the flexibility of a listener to seamlessly swap between devices, allowing you to connect to your current or future devices. Includes: KPH40 Utility, 3.5mm Utility Cord

Customer reviews

4.4 out of 5 stars
944 global ratings

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楽しい音
5 out of 5 stars
楽しい音
この軽さで低音も出ている 広告のような街中で違和感ない使い方もできる 大きなヘッドフォンを街中でしていたら異様でしょう 中間コードの接続は確実にする必要ありぐりぐりして確認
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Top reviews from Japan

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  • Eduardo Hernandez Valdez
    5.0 out of 5 stars great headphones
    Reviewed in Japan on November 11, 2025
    Verified Purchase
    really good sound, leaks a bunch of audio at high volumes, so they are better when used alone.
    One person found this helpful
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  • TzuHung Yu
    5.0 out of 5 stars Useful and light
    Reviewed in Japan on May 17, 2022
    Verified Purchase
    Customer image
    TzuHung Yu
    5.0 out of 5 stars
    Useful and light

    Reviewed in Japan on May 17, 2022

    Images in this review
    Customer image
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  • Osaneko
    4.0 out of 5 stars 疲れない
    Reviewed in Japan on February 26, 2024
    Verified Purchase
    電子ピアノ用に使っています。
    長時間練習しても耳が痛くならないので、全く疲れません。
    このような高音質で、軽量の開放型ヘッドホンをずっと探していました。
    だだコードが少し短いので、あと30ｃｍ長かったら最高です。
    6 people found this helpful
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  • island
    5.0 out of 5 stars 楽しい音
    Reviewed in Japan on August 10, 2025
    Verified Purchase
    この軽さで低音も出ている
    広告のような街中で違和感ない使い方もできる
    大きなヘッドフォンを街中でしていたら異様でしょう
    中間コードの接続は確実にする必要ありぐりぐりして確認
    Customer image
    island
    5.0 out of 5 stars
    楽しい音

    Reviewed in Japan on August 10, 2025
    この軽さで低音も出ている
    広告のような街中で違和感ない使い方もできる
    大きなヘッドフォンを街中でしていたら異様でしょう
    中間コードの接続は確実にする必要ありぐりぐりして確認
    Images in this review
    Customer image
    2 people found this helpful
    Helpful
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  • qqq
    5.0 out of 5 stars 不能听现代音乐的别有风味的老式耳机
    Reviewed in Japan on February 24, 2026
    Verified Purchase
    这个耳机作为日常听歌时非常可以的。虽然解析力比起现代的耳机差远了，比如不如IE200，也不如昂贵的蓝牙耳机。可是它轻便自然的特点，还有老式的声音。还是值得聆听的。如果喜欢听电子或者现代的音乐还是别买了。
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  • やつお
    3.0 out of 5 stars 付け心地は軽量で良いのだが、音は中低音(80～400Hz近辺)がやたら強調されてピーキーなヘッドホン
    Reviewed in Japan on January 21, 2025
    Verified Purchase
    オーバーイヤーヘッドホン(開放型＆密閉型共に)は蒸れる＆重い&耳が痛くなるのでNG。
    カナル型＆インナーイヤー型のイヤホンは耳が痛くなるのでNG。
    オンイヤーヘッドホンであっても耳に掛けるタイプのは耳たぶが痛くなるのでNG。
    ということでたどり着いたのが、本機のような形状のオンイヤーヘッドホン。

    以前はオーディオテクニカのATH-P100LVやPanasonicのRP-HT21などを使ってきました。
    音はいい意味で平坦で良かったのですが、どちらも伸縮機構を制御する爪と付近のプラスチックが取れて半年持たずにゴミ箱行き。
    というわけで、同様の伸縮機構を持たない本機を購入。

    付け心地は非常によく耳に適度に挟まり、長時間の装着も苦ではありません。
    しかし、音は長所と短所がはっきりするピーキーなものでした。
    特徴はただ一つ。中低音(80～400Hz近辺)がやたら強調される事。
    中低音が控えめな楽曲とは相性がいいものの、
    元から中低音ガッツリ高めてる楽曲だと他の音域が聴こえづらくなり、視聴に疲れる状況になります。
    調整すれば非常に素直な音が出てきますので、なんらかのイコライザで調整することをおすすめします。

    アームの縦方向の長さが短く、最大限伸ばしても実測17cm程。
    金属製アームなので、ある程度は金属のしなりで伸ばせるとはいえ、大頭や長顔の人にとっては少々厳しい感じはあります。
    4 people found this helpful
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  • グフカスタム
    5.0 out of 5 stars 軽くチープなのに質が良い
    Reviewed in Japan on March 13, 2023
    Verified Purchase
    迷っている方は試しに購入されて損はしない製品だと思います。ケーブル接続が許せるのであれば、軽く音質が良いため屋内用に丁度良いです。このシンプルさは癖になりました。
    9 people found this helpful
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  • k&k8
    1.0 out of 5 stars ハズレひいたか？
    Reviewed in Japan on December 6, 2024
    Verified Purchase
    ボーカルが左からはほとんど聞こえない、右からの音が強いのだが、それともこう言った仕様なのかkossPorter Proも持っているけれどバランス良くちゃんと聴こえているしハズレなら交換案件だよね
    2 people found this helpful
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Top reviews from other countries

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  • Caitie
    5.0 out of 5 stars The sound quality is impeccable!
    Reviewed in the United Kingdom on October 11, 2025
    Verified Purchase
    I had a pair my late grandad and Mum got me Koss headphones similar to these when I was very little for my portable cassette player. But over the years they went missing. But buying this has been the best decision I've made, they sound fantastic and even better than I remember, the bass is punchy and mids and highs are clear but not overpowering, simply better than any other headphones I've used in a long time.

    Comparing to my very expensive Sony's I very much improve the sound quality on these. You won't regret your purchase and if you want them wireless, get something similar to the FIIP BTR5's.
    Report
  • jono
    5.0 out of 5 stars Just buy them
    Reviewed in Australia on April 19, 2022
    Verified Purchase
    I had insanely high expectations for these and they surpassed them 10 fold. At such a low cost you literally have nothing to lose
    Report
  • CS
    5.0 out of 5 stars Great Koss sound! Found the perfect cable extension.
    Reviewed in the United States on July 7, 2023
    Verified Purchase
    I wanted a lightweight & comfortable, affordable, yet great-sounding pair of on-hear headphones to sit at my desk (not travel) with. Fortunately, Koss came up in one of my many searches and I suddenly remembered my very first pair of headphones for my very first stereo back in the late 70's. They surprisingly blew away all the competition back then, even Pioneer, Panasonic and Sony headphones. Sounded like you were right in the concert hall!

    So I looked at all the latest offerings by Koss, and really appreciated the long review for this pair by the top reviewer 'Ender'—comparing different models of Koss & other headphones. (I don't have time to be an audiophile, I just want to enjoy my music collection in iTunes while sitting at the computer). I immediately ordered these headphones.

    I knew I would also want to extend the cable, but waited until after they arrived to see the size and types of plugs they were fitted with. (The Q&A for this product in regard to that was too technical & confusing to follow.)

    These headphone did not disappoint! They have that great Koss sound, with a comfortable lightweight band on my head, which gratefully doesn't get snagged in my thick curly hair. Don't let the appearance of the thin foam earpads fool you— they are comfy, secured well and transmit the audio clearly.

    (UPDATE: I had initially tried adding a pair of Yaxi pads as suggested by another helpful reviewer, but those would not stay on, and were so thick the sound was being muffled. Stick with the OEM earpads!)

    Next up was to find a longer extension cable that fit. Curious that Koss doesn't offer anything—even on their website. I first noted that the tip that plugs into the cable that is permanently attached to the headphones is 2.5mm (male) and the other plug that goes into your computer, music device, etc. is 3.5mm (thicker plug), also male.

    Then I had to learn the difference between TRRS (3 black rings on the tip of the plug) and TRS (2 black rings).

    So the search was on for a quality extension cable with a 2.5mm male TRRS plug and a 3.5mm male TRS plug—which is exactly what these headphones require. I found only one such cable on Amazon—ASIN: B08MX53T1T and took a chance despite the ridiculous product name. Turns out it is of solid build and does not diminish the sound quality of these Koss headphones. Total length of combined straight & coiled cord is 51 inches, not stretched.

    Minimal upgrade costs and these headphones are customized for my comfort & listening pleasure! I recommend all of these parts, but probably not as a mobile on-the-go setup—I'm not sure the headphones would hold up to that, they seem too fragile for traveling with. (The extension cable would certainly hold up, though.) Enjoy, and I hope this helped!
    Report
  • D. G.
    5.0 out of 5 stars I bought three
    Reviewed in the Netherlands on October 17, 2024
    Verified Purchase
    So good are these, and for travelling they are just perfect
    Report
  • Wiesław Trąmpczyński
    5.0 out of 5 stars najlepsza relacja ceny do jakości
    Reviewed in Poland on September 24, 2024
    Verified Purchase
    Doskonałe słuchawki dla ludzi, którzy słuchawek a uszach specjalnie nie lubią.Nie przeszkadzają, nie uwierają, a grają doskonale. Lepsze od Porta Pro. I ładniejsze. Jedne z najlepszych słuchawek jakich słuchałem i w stosunku do tej jakości rewelacyjnie tanie. Choć widzę, że już powoli drożeją, a dodatkowe wymienne kable (np. usb-c) są koszmarnie drogie.
    Report
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