Website author headshot
Cameron Oatley
ExtremeHiFi
Website author headshot
Julian Shapiro
ExtremeHiFi

Note that this is a discontinued product. You may want to visit the brand's page here to browse their newer products.

What reviewers think

Bloggers and YouTubers have tried this product—so we've summarized their strongest opinions below. Links to full reviews follow.

Product Strengths

  • The sound is warm, smooth, lush, organic, and impactful
  • Very light and comfortable on the head
  • Foldable and very compact, making them easy to travel with
  • Battery lasts more than twenty hours
  • Bluetooth connection does nothing to detract from the relaxed and powerful bass character

Product Considerations

  • Only AAC and SBC codecs are supported, no AptX or LDAC
  • There is noticeable latency in the audio/video synchronization
  • The Bluetooth connection is disabled when the charging cable is plugged in
  • Not the most resolving sets in the world
  • Semi-open, so they are not all that isolating and leak a fair amount of sound

Comparisons (according to reviewers)

  • Vs Marshall Major V: Koss Porta Pro Wireless 2.0 stands out for its semi-open design, offering a wider soundstage

Takeaway: The Porta Pro Wireless brings a classic into the modern era while keeping its original sound signature. They are light, comfortable, and convenient to carry around, making them great for enjoying music on the go.

What are hifi reviews useful for? (1) Identifying products you should demo in person at a dealer. (2) Learning which products reviewers unanimously praise as the best they've heard (this means they probably are legitimately great). (3) Identifying a product's attributes that satisfy your idiosyncratic needs and tastes. Beyond that, we often discount what reviewers say because they heap praise on most products—and are often apprehensive about publishing strong criticism or comparisons between products. Further, they seldom have more than a few products on-hand, often relying on their memories to compare past products. Always listen for yourself.

All

Porta Pro® Wireless

reviews

[{"title":"About friggin' time 🔥 // KOSS PORTA PRO WIRELESS 2.0","link":"https://www.youtube.com/watch?v=zlPvMv5mmIU","source":"Super* Review","datePublished":"2025"},{"title":"Koss’ new Bluetooth Porta Pro, it’s really good","link":"https://www.youtube.com/watch?v=b8eODH8aVCs","source":"GearUP with Aaron","datePublished":"2018"},{"title":"Koss made the Porta Pro Wireless.. REJOICE!","link":"https://www.youtube.com/watch?v=O8GycotDiLM","source":"Steve Guttenberg Audiophiliac","datePublished":"2025"},{"title":"Koss Porta Pro Wireless Headphone Review - Yes! It's A Porta Pro With No Wires! Like It Should Be!","link":"https://www.youtube.com/watch?v=wTYPybtMOmg","source":"Master Marslander","datePublished":"2025"},{"title":"KOSS Porta Pro Wireless 2.0 Review: Classic Evolution","link":"https://www.headphonecheck.com/test/koss-porta-pro-wireless-2-0","source":"headphonecheck.com","datePublished":""},{"title":"Koss Porta Pro Wireless 2.0 headphones review","link":"https://blog.son-video.com/en/2025/05/koss-porta-pro-wireless-2-0-headphones-review-vintage-in-wireless-mode","source":"blog.son-video.com","datePublished":""}]
An excellent review of a great product
/
Publisher
/
3/1/2022
An excellent review of a great product
Publisher
/
3/1/2022

Manufacturer details

  • Frequency Response: 15-25,000 Hz
  • Impedance: 60 ohms
  • Sensitivity: 101 dB SPL
  • Bluetooth Version: 5.2
  • Battery Life: Up to 20+ hours
  • Charging: USB-C
Introducing the next generation of Porta Pro® with Wireless Bluetooth 5.2, USB-C charging, Analog Audio Pass Through for wired listening, on-board microphone and controls for taking calls/controlling music and up to 20+ hours of battery life, all in the same durable, lightweight legendary design as the original.
Manufacturer Site

Brand highlights

Taking a step back to look at reviewers' thoughts of the brand's entire lineup—not just this product—what stands out most is the following:

  • Koss is known for electrostatic headphones and complete systems, including dedicated energizer/amplifiers, at a comparatively affordable price.
  • The brand balances the retro aesthetic of classic designs with modern features such as wireless connectivity and detachable cables.
  • The brand fosters a community around its products, evident in collaborations with companies such as Drop, and is receptive to community feedback in design and development.

Porta Pro

  • Positioning: The entry-level design focused on portability and everyday use.
  • Description: Features updated aesthetics with inline controls and a comfortable build that suit small-room or on-the-go listening. Compared to the mid-range and electrostatic models, it offers a simpler sound signature and basic functionality without high-end tuning.

PRO/4AA

  • Positioning: A mid-range option aimed at users looking for robust, everyday performance.
  • Description: Delivers clear sound and reliable build quality that make it suitable for studio work and extended listening sessions. When compared to the entry-level Porta Pro and more premium electrostatic products, it provides improved audio clarity and durability with a modest step up in cost.

QZ99

  • Positioning: A balanced mid-range model designed for everyday versatility.
  • Description: Introduces modern design elements and enhanced comfort to fit both home and travel use with stable sound performance. In comparison to the PRO/4AA and Porta Pro, it emphasizes design refinement and user experience, though it does not offer the advanced technology of the electrostatic series.

ESP950

  • Positioning: A high-end electrostatic system aimed at detailed and precise sound reproduction.
  • Description: Uses electrostatic driver technology to deliver clear, crisp audio with a spacious soundstage suitable for controlled listening environments. Compared to non-electrostatic models like the QZ99 and PRO/4AA, it stands out with higher sonic precision while remaining a step below the flagship model in overall refinement.

ESP95X-plus

  • Positioning: The flagship model featuring premium electrostatic technology and superior build quality.
  • Description: Refines electrostatic design with enhanced tuning and high-quality materials for exceptional clarity and performance. When contrasted with the ESP950 and other lower-tier models, it offers the most advanced features and detailed sound response.
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Avg. Product Price
$500
Used For Sale
1
 Available (Scroll Down)
Brand Popularity
595
 of 900+
Badges
Top 50 Brand
Top 250 Brand
Products Listed
8
Founding Year
1953

Our take on the brand

Koss invented the world's first stereo headphones in 1958 (the SP/3, now in the Smithsonian), effectively creating personal listening, and has continued pioneering firsts including the first self-energizing electrostatic headphone (ESP/6, 1968) and the first dynamic headphone to reproduce all 10 audible octaves (HV/1A, 1974). The brand offers unusually broad limited lifetime warranty coverage on many models and created the modular Utility Series (2021) with detachable cords that let the same headphones work with future devices through different cable connections.

Look inside the brand

Brand Page

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

From our interview with
.
Brand Page

Used

Koss

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What if you spend more?

Product image
HIFIMAN
Ananda-BT
799
799
/
10
Reviews
HIFIMAN is a hifi brand known for its planar magnetic headphones that use extremely thin diaphragms and acoustically transparent "Stealth Magnets" to reduce sound distortion. The company pioneered high-resolution portable audio players and creates electrostatic headphones that bring high-end sound quality to more accessible price points, as well as widely renowned flagship models such as the Susvara.
Check Amazon
Expand Details

Product Strengths

  • Impressive, high-quality audio reproduction and detail that is comparable to wired headphones
  • Comfortable for long listening sessions
  • Bluetooth connectivity is stable with a long-distance range
  • High-quality codecs are supported, including LDAC and aptX HD
  • Can be used wired via USB-C

Product Considerations

  • Open-back design offers limited passive noise isolation and noticeable sound leakage
  • Clamping force of the earcups can cause hotspot around the temple area
  • Battery life is average, and battery is not easily replaceable
  • Limited on-device control options for volume or skipping tracks
  • USB-C connectivity may have volume and usability issues, depending on the source device

Comparisons (according to reviewers)

  • Versus Focal Batis, the Ananda-BT is a direct competitor
  • Versus Sennheiser Momentum 4, the Sennheiser has slightly better call quality, but the audio quality is disappointing in resolution and clarity compared to Ananda-BT
  • The wired version has superior sound, but the Ananda-BT is more versatile due to its Bluetooth connectivity
  • Versus Bose QC35II, the QC35II is better for portability and noise isolation, but Ananda-BT has far superior sound quality

Takeaway: The Ananda-BT are great sounding wireless headphones that offer impressive technical capabilities. For audiophiles who value convenience without sacrificing too much sound quality, they could be worth considering.

Video review

Our take on the brand

HIFIMAN is a hifi brand known for its planar magnetic headphones that use extremely thin diaphragms and acoustically transparent "Stealth Magnets" to reduce sound distortion. The company pioneered high-resolution portable audio players and creates electrostatic headphones that bring high-end sound quality to more accessible price points, as well as widely renowned flagship models such as the Susvara.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
Product Page
Product Page

What competes at this price?

1 More
S70
119
/
Released
2024
1MORE's open-ear headphones combine 10 years of research with lightweight aerospace-grade titanium and soft skin-friendly liquid silicone, they provide a comfortable and secure fit for any ear shape, and each earbud weighs just 8.7 grams.
Check Amazon
1MORE is a hifi audio brand known for headphones that achieved multiple industry firsts, including the first THX-certified headphones and true wireless earbuds. The brand offers distinctive features like QuietMax ANC technology, affordable head-tracked spatial audio, and multi-driver configurations, such as their five-driver hybrid with four planar drivers.
Expand Details

Our Summary

Product Strengths

  • Very comfortable to wear, to the point of almost forgetting they are being worn due to the light weight and design
  • Sound quality is good for open-ear earbuds, with clear audio and decent bass
  • Solid battery life offers around 12 hours of playback on a single charge, and 40 hours with the charging case

Product Considerations

  • Maximum volume may be on the lower side, especially in noisy environments
  • The triple tap control can be tricky to use
  • Lacks a custom EQ option in the app, only offering preset EQs
  • Does not support wireless charging
  • Weak case magnets cause earbuds to fall out easily if dropped

Comparisons (according to reviewers)

  • Vs 1More S50: The S70 is a tad softer than the S50, but has more stock bass; the S70 build quality has jumped a few notches; the S70 is a proper follow-up to the S50

Takeaway: The 1More S70 are comfortable open-ear earbuds with great sound quality and good battery life for those who like to be aware of their surroundings while listening to audio. The sleek design and practical features make them a solid choice for everyday use.

Video review

Our take on the brand

1MORE is a hifi audio brand known for headphones that achieved multiple industry firsts, including the first THX-certified headphones and true wireless earbuds. The brand offers distinctive features like QuietMax ANC technology, affordable head-tracked spatial audio, and multi-driver configurations, such as their five-driver hybrid with four planar drivers.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
Product Page
Product Page
HIFIMAN
Deva
299
/
Released
2020
DEVA — Affordable Open-Back Planar Magnetic Headphones with Stealth Magnet Clarity and Optional Bluetooth via Bluemini Dongle.
Check Amazon
HIFIMAN is a hifi brand known for its planar magnetic headphones that use extremely thin diaphragms and acoustically transparent "Stealth Magnets" to reduce sound distortion. The company pioneered high-resolution portable audio players and creates electrostatic headphones that bring high-end sound quality to more accessible price points, as well as widely renowned flagship models such as the Susvara.
Expand Details

Our Summary

Product Strengths

  • Open-back design provides a wide soundstage, sometimes described as industry-leading for a Bluetooth headphone.
  • The BlueMini Bluetooth adapter is convenient, versatile, and provides good value as a wireless balanced DAC/amp module.
  • Comfortable to wear, with large ear holes and soft earpads accommodating various ear sizes.
  • A wired-only version has been released at a lower price, making it more attractive for wired listening.
  • Offers multiple connectivity options: wired (analog and digital via USB), and wireless (Bluetooth).

Product Considerations

  • Bass response may be lacking for bass enthusiasts, described as 'sucking' or 'rolling off' in some reviews.
  • Treble can be bright and sibilant, and potentially 'hashy', especially at higher volumes or with certain pairings.
  • The build quality, while decent, uses more plastic than some competitors like the Sundara.
  • The stock cable is stiff and can produce microphonics.
  • The included Blue Mini Bluetooth adapter lacks advanced features like volume control or track skipping.

Comparisons (according to reviewers)

  • Vs. Hifiman Sundara: The Sundara generally offers better overall sound quality, detail, vocal presentation, and bass (when both are wired), but the Deva with BlueMini gets very close.
  • Vs. Hifiman HE400/HE400i: The Deva is better overall when using the BlueMini, especially compared to HE400.
  • Vs. Sennheiser HD 6XX/650: The Deva is similar in some ways to the HD 6XX, with a comparable sound signature, but the HD6XX may be smoother in some respects, the HD6XX bass tends to be muddy, while the Deva has a tighter controlled base.
  • Vs. AKG K712 Pro: The Deva is tuned closer to the HD 6XX and the 712 Pro but has a narrower soundstage, the 712 Pro has fun articulate bass.

Takeaway: The Hifiman Deva is a versatile headphone that offers a unique blend of open-back planar sound with convenient Bluetooth connectivity, making it a worthwhile consideration for those seeking a convenient and good-sounding listening experience, especially at home or in the office. The inclusion of the BlueMini offers great value as both a Bluetooth receiver and a DAC/Amp, which lets the Deva sound great when wired to a great amp or even just as a DAC to your computer.

Video review

Our take on the brand

HIFIMAN is a hifi brand known for its planar magnetic headphones that use extremely thin diaphragms and acoustically transparent "Stealth Magnets" to reduce sound distortion. The company pioneered high-resolution portable audio players and creates electrostatic headphones that bring high-end sound quality to more accessible price points, as well as widely renowned flagship models such as the Susvara.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
Product Page
Product Page
HIFIMAN
Deva Pro
199
/
Released
2019
DEVA Pro (Packaged with Bluetooth Dongle) — Open-back planar headphones with Stealth Magnet clarity and versatile wired or wireless connectivity.
Check Amazon
HIFIMAN is a hifi brand known for its planar magnetic headphones that use extremely thin diaphragms and acoustically transparent "Stealth Magnets" to reduce sound distortion. The company pioneered high-resolution portable audio players and creates electrostatic headphones that bring high-end sound quality to more accessible price points, as well as widely renowned flagship models such as the Susvara.
Expand Details

Our Summary

Product Strengths

  • Excellent spatial presentation, quite holographic, with coherent imaging and separation.
  • Balanced sound signature and neutral tuning.
  • Improved over the original Deva, adding warmth to fix a slight imbalance of the original.
  • Wireless performance is very good due to BlueMini R2R dongle.
  • Very comfortable to wear.

Product Considerations

  • Use caution when taking it outdoors, particularly when it's windy.
  • Stock cable is subpar.
  • Aftermarket cable considerations must be taken into account because standard dual 3.5mm headphone cables can short something out.
  • Drivability can be an issue with some devices, potentially requiring high gain and higher volume levels on DAPs.
  • The extension mechanism on the headband feels a little bit clunky at times.

Comparisons (according to reviewers)

  • Vs HE400SE: A clear step up, with better resolution and less sibilance.
  • Vs Sennheiser HD600/HD6XX: The Deva Pro has a very expansive soundstage, quite a bit wider than what is found on something like the HD600 or HD6XX.

Takeaway: The Deva Pro is a well-rounded wireless headphone with a pleasingly balanced sound and a uniquely holographic spatial presentation, making it a great choice for audiophiles seeking convenience. The inclusion of the Bluemini R2R adds value through its wireless capabilities.

Video review

Our take on the brand

HIFIMAN is a hifi brand known for its planar magnetic headphones that use extremely thin diaphragms and acoustically transparent "Stealth Magnets" to reduce sound distortion. The company pioneered high-resolution portable audio players and creates electrostatic headphones that bring high-end sound quality to more accessible price points, as well as widely renowned flagship models such as the Susvara.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
Product Page
Product Page
Sony
Float Run
149
/
Released
Lightweight off-ear wireless headphones designed for runners and athletes: they stay stable, let you hear the world around you, and provide up to 10 hours of music playback with quick charge, all in an IPX4-splash resistant, secure neckband form.
Check Amazon
Sony developed the LDAC Bluetooth codec enabling wireless streaming at up to 990 kbps and 360 Reality Audio that personalizes playback by analyzing photos of your ears to tailor spatial imaging. They've given a lot to the hifi audio industry, and manufacture some of the most popular wireless headphone models available today.
Expand Details

Our Summary

Product Strengths

  • Very secure and comfortable fit due to the design, allowing for extended wear without anything going into the ears.
  • Designed to allow awareness of surroundings, important for runners and outdoor activities.
  • Sound quality is decent considering the open-ear design.
  • Good for phone calls; microphone quality is better than other Bluetooth sport headphones.
  • IPX4 rated for sweat and splash resistance.

Product Considerations

  • Sound quality is compromised compared to regular headphones or earbuds, especially regarding bass.
  • Sound leakage can be an issue in quiet environments at higher volumes.
  • Uncomfortable for long durations if wearing glasses.
  • The effective volume range is limited when using in noisy environments.
  • Bass frequencies are intentionally subdued, the sound profile is not for everyone, and best suits easy-listening genres like acoustic, classical, jazz, and podcasts.

Comparisons (according to reviewers)

  • Vs Shox Bone Conduction Headphones: The Float Run is a better option for those who do not like bone conduction, finding it weird or ticklish.
  • Vs Bose Sport Open Earbuds: Unfavorable comparison, the Bose Sport Open Earbuds are better open-ear sport headphones.
  • Vs Sony Linkbuds: The Linkbuds are more expensive but have more utility and advanced features like app compatibility and Bluetooth multipoint.
  • Vs Shokz OpenRun Bone Conduction: The Shokz OpenRun Bone Conduction are more comfortable, better built, and have longer continuous battery life.

Takeaway: If you want to hear what's around you while you run or work out, these could be a good fit. They are made to stay in place and let you enjoy music while staying aware.

Video review

Our take on the brand

Sony developed the LDAC Bluetooth codec enabling wireless streaming at up to 990 kbps and 360 Reality Audio that personalizes playback by analyzing photos of your ears to tailor spatial imaging. They've given a lot to the hifi audio industry, and manufacture some of the most popular wireless headphone models available today.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
Product Page
Product Page
Sony
LinkBuds Open
229
/
Released
2023
LinkBuds Open Truly Wireless Earbuds feature a soft and ergonomic shape for all-day comfort, high-quality audio with an 11mm ring-shaped driver unit, and a unique open ring design that keeps you connected to your surroundings.
Check Amazon
Sony developed the LDAC Bluetooth codec enabling wireless streaming at up to 990 kbps and 360 Reality Audio that personalizes playback by analyzing photos of your ears to tailor spatial imaging. They've given a lot to the hifi audio industry, and manufacture some of the most popular wireless headphone models available today.
Expand Details

Our Summary

Product Strengths

  • Outstanding audio quality while ensuring awareness of surroundings
  • Well-rounded frequency response helps keep most of the bass frequencies intact, while still permitting hearing outside noises
  • Extremely comfortable and secure design, especially for runners and athletes, due to the 'Air Fitting supports'
  • Balanced midrange reproduction, making them suitable for genres like indie ballads and soft rock
  • Healthy stack of features, offering Bluetooth Multipoint, head gesture controls, Sony 360 Reality Audio, and auto play/pause

Product Considerations

  • Open design limits overall sonic capabilities and bass response
  • Open design leaks sound and also lets in unwanted noise
  • Average battery life (8 hours from the buds)
  • Can be tricky to position correctly in the ear

Comparisons (according to reviewers)

  • Vs Nothing Ear (Open): The Sony LinkBuds Open are a better bet than the Nothing Ear (Open) thanks to their stronger bass and more comfortable, discreet design

Takeaway: The Sony LinkBuds Open are a great option for those who want awareness of their surroundings with good sound. If struggling with in-ear fit, these earbuds could be the answer.

Video review

Our take on the brand

Sony developed the LDAC Bluetooth codec enabling wireless streaming at up to 990 kbps and 360 Reality Audio that personalizes playback by analyzing photos of your ears to tailor spatial imaging. They've given a lot to the hifi audio industry, and manufacture some of the most popular wireless headphone models available today.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer
Product Page
Product Page

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