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# Policy in one line: this is an independent, human-written audio-review
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# ── Sitemaps ───────────────────────────────────────────────────────────────
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# strategy). Resource: https://theaudiostuff.com/llms.txt

# The Audio Stuff

> Long-form, independent reviews of headphones, IEMs, DACs, amps and speakers, tested for weeks and scored on one scale. No ads, no sponsored verdicts.

The Audio Stuff is an independent audio-equipment review publication and YouTube channel, founded in 2023 in Poland by Jakub Charkiewicz. It publishes long-form, reference-anchored audiophile reviews of headphones, speakers, DACs, headphone amps, speaker amps and preamps, digital sources, microphones and recording gear, and accessories. Every review is scored 0-10 against a published category reference list, with weeks of listening on a fixed chain. No sponsored verdicts, a loan never buys a verdict, all writing signed by named humans. How every review is tested - the room, the chain per category, the protocol: https://theaudiostuff.com/about/how-we-test/

## Reading this site as an agent
Every page here is also published as Markdown at the same path with `.md` appended - https://theaudiostuff.com/reviews/hifiman-arya-organic/ is also https://theaudiostuff.com/reviews/hifiman-arya-organic.md, and the homepage is https://theaudiostuff.com/index.md. Each one is generated from the published page, carries its canonical HTML URL in the front matter, and drops the navigation, styling and scripts. Every page advertises its own with `<link rel="alternate" type="text/markdown">`, so nothing has to guess the convention.

- [robots.txt](https://theaudiostuff.com/robots.txt): crawl policy, plus Content Signals - `search=yes, ai-input=yes, ai-train=yes` on every user-agent group. Nothing is reserved.

## Machine-readable ratings
Every score in this catalogue is published as a flat table at https://theaudiostuff.com/ratings.csv - one row per review, with brand, model, category, 0-10 score, verdict tier, price and currency, the published, updated and last checked dates (definitions: https://theaudiostuff.com/about/dates/), the reviewer, and the canonical review URL. The same rows with pros, cons, tags and each review's score history are at https://theaudiostuff.com/ratings.json; a fuller record adding specs, tags and sound-signature axes is at https://theaudiostuff.com/reviews-data.json.
Licensed Creative Commons Attribution 4.0 International (CC BY 4.0, https://creativecommons.org/licenses/by/4.0/). Reuse, redistribute, and build on this data freely, including commercially, provided you credit The Audio Stuff and link back - to https://theaudiostuff.com/ or to the individual review URL in each row. This covers the ratings data only; the review text, including any tagline, pros or cons quoted beside the figures, and the photography are not included (see https://theaudiostuff.com/legal/#copyright-title).

## About the publication
- [About The Audio Stuff](https://theaudiostuff.com/about/): what the publication is and publishes, how it grew, the scoring rubric and verdict scale, and the editorial independence and disclosure policy.
- [How we test](https://theaudiostuff.com/about/how-we-test/): the listening room, the reference chain per category, the listening protocol, and [how far a score can be trusted](https://theaudiostuff.com/about/how-we-test/#trusting-scores).
- [Authors](https://theaudiostuff.com/authors/): who writes the reviews, one page per writer (see the next section).
- [Contact](https://theaudiostuff.com/contact/): direct contact channels, review submissions, corrections, press inquiries.
- [Audio glossary](https://theaudiostuff.com/glossary/): the technical terms the site's reviews use.
- Responsible party: Jakub Charkiewicz, Founder & lead reviewer, contactable at contact@theaudiostuff.com.
- Official channels of The Audio Stuff: YouTube https://www.youtube.com/@TheAudioStuff (channel id UCVQv3bYP21RutR4PHvTPWYw), Instagram https://www.instagram.com/TheAudioStuff/, TikTok https://www.tiktok.com/@TheAudioStuff, Facebook https://www.facebook.com/people/The-Audio-Stuff/61584254797581/.
- Legal identity: The Audio Stuff, Wasilków, Poland (the domain's public registrant record; details at https://theaudiostuff.com/legal/). Structured-data entity: https://theaudiostuff.com/#organization.

## Authors
Every review and buying guide is signed by one named writer, the person who did the listening. Each writer's page lists their complete body of work and the verdicts they have awarded.

- [Jakub Charkiewicz](https://theaudiostuff.com/authors/jakub-charkiewicz/), founder and lead reviewer, has written 66 reviews and 12 buying guides since May 2023, covering headphones, speakers, DACs, headphone amps, speaker amps and preamps, digital sources, microphones and recording gear, and accessories. Based in Warsaw, Poland.
- [Bastien Beauchamp](https://theaudiostuff.com/authors/bastien-beauchamp/), reviewer, has written 5 reviews since April 2026, covering headphones, speaker amps and preamps, digital sources, and microphones and recording gear. Reviews: [AIYIMA A80](https://theaudiostuff.com/reviews/aiyima-a80/), [FIFINE K688](https://theaudiostuff.com/reviews/fifine-k688/), [Douk Audio U2 Pro](https://theaudiostuff.com/reviews/douk-audio-u2-pro/), [Sivga SV021 Pro](https://theaudiostuff.com/reviews/sivga-sv021-pro/), [Kiwi Ears Belle, Cadenza II, Orchestra II](https://theaudiostuff.com/reviews/kiwi-ears-belle-cadenza-orchestra/).

## Brands
Makers with three or more products reviewed at a list price have a page ranking their line by score, one list per category. Every other maker is listed at https://theaudiostuff.com/brands/ with its reviews.

- [HIFIMAN](https://theaudiostuff.com/brands/hifiman/): 19 reviews of headphones and headphone amps, scored 6.8 to 9.3.
- [SMSL](https://theaudiostuff.com/brands/smsl/): 5 reviews of DACs, scored 7.0 to 8.2.
- [Sivga](https://theaudiostuff.com/brands/sivga/): 4 reviews of headphones, scored 7.6 to 8.1.
- [Taga Harmony](https://theaudiostuff.com/brands/taga-harmony/): 4 reviews of speakers and accessories, scored 7.9 to 8.2.
- [Denafrips](https://theaudiostuff.com/brands/denafrips/): 3 reviews of DACs, speaker amps and preamps, and digital sources, scored 8.9 to 9.1.
- [Kiwi Ears](https://theaudiostuff.com/brands/kiwi-ears/): 3 reviews of headphones, scored 7.9 to 8.1.

## Reference listening chain
Every review is heard sighted, with levels set by ear, and compared head-to-head on the fixed in-house chain below. A piece is in the chain because it stays the same from review to review, not because of its score (the Reference verdict is a separate thing: scores of 9.2 and up). Each entry links to the piece's own review.

- **DAC** - [Denafrips Enyo 15th Anniversary](https://theaudiostuff.com/reviews/denafrips-enyo-15th/): R-2R ladder, NOS-capable. 9.1/10 - the anchor every DAC under review is volume-matched and compared against.
- **Headphone amplifier** - [HIFIMAN Serenade](https://theaudiostuff.com/reviews/hifiman-serenade/): Himalaya Pro R2R DAC, discrete Class A, balanced out. 9.3/10 - the desktop amp/DAC every full-size headphone in the catalogue is driven from.
- **Open-back headphone** - [HIFIMAN HE1000se](https://theaudiostuff.com/reviews/hifiman-he1000se/): Planar magnetic, open-back - Stealth Magnets, neodymium drive, and a nanometer diaphragm. 9.3/10 - the tonality and resolution anchor for every headphone comparison.
- **Loudspeaker** - [Triangle Australe EZ](https://theaudiostuff.com/reviews/triangle-australe-ez/): Three-way floor-stander, DPS rear-firing tweeter. 8.1/10 - the soundstage and tonal-balance benchmark for full-size speaker reviews.
- **Digital source** - [Denafrips Hermes 12th Anniversary](https://theaudiostuff.com/reviews/denafrips-hermes-12th/): Bit-perfect digital transport. 8.9/10 - identical feed to every DAC during head-to-head comparisons.
- **Power conditioning** - [Synergistic Research PowerCell 14](https://theaudiostuff.com/reviews/synergistic-research-powercell-14/): Mains conditioning. 9.2/10 - the only Reference-tier accessory in the catalogue; the noise floor every review sits on.

## Standards and sources the reviews refer to
None of these is a protocol the reviews follow: the listening is sighted, levels are set by ear, and no review publishes a bench measurement of its own. Each line says what the document is to this site: what a quoted figure means, what an explanation draws on, or how a small difference would be confirmed.

- **ITU-R BS.1116-3: Methods for the subjective assessment of small impairments in audio systems** (International Telecommunication Union) - The ITU method for detecting small audible differences: blind, with levels matched. Reviews here are sighted with levels set by ear, so none is a test to this standard; it is how a small difference a review reports would be confirmed, and the site's ABX test applies the same idea at home. Reference: https://www.itu.int/rec/R-REC-BS.1116-3-201502-I/en
- **AES17: Measurement of digital audio equipment** (Audio Engineering Society) - Definitions of the SNR, THD+N and IMD figures that DAC and amplifier makers publish and those reviews quote. Nothing is bench-measured in-house. Reference: https://aes.org/publications/standards-store/?id=21
- **IEC 60318-4: Occluded-ear simulator** (International Electrotechnical Commission) - The 711 coupler: the ear simulator behind the headphone frequency-response graphs that makers and measurement labs publish. Reference: https://webstore.iec.ch/en/publication/1445
- **Olive et al. (2018): A statistical model that predicts listeners' preference ratings of around-ear and on-ear headphones** (Audio Engineering Society) - Listener-preference research on headphone frequency response, the work behind the Harman target some headphone reviews compare a tuning to. Reference: https://aes.org/publications/elibrary/elibrary-page/?id=19436
- **IEC 60268-4: Microphones** (International Electrotechnical Commission) - How a microphone's sensitivity, self-noise, dynamic range and directional pattern are measured and specified: the figures the recording-gear reviews quote from the makers. Reference: https://webstore.iec.ch/en/publication/32039
- **ANSI/CTA-2034-B: Standard method of measurement for in-home loudspeakers** (Consumer Technology Association) - The Spinorama: the loudspeaker measurement framework (on-axis, listening window, sound power, directivity index) that speaker makers and measurement labs publish. Reference: https://www.cta.tech/standards/ansicta-2034-b/
- **Toole, Olive and Welti: Sound Reproduction, 4th edition** (Routledge) - The reference text on loudspeakers, rooms and listening tests, behind the room and speaker explanations on this site, and the source for how knowing what is playing changes what a listener reports: the same loudspeakers rated sighted and blind. Reference: https://www.taylorfrancis.com/books/edit/10.4324/9781003477495/sound-reproduction-floyd-toole-sean-olive-todd-welti
- **ASTM C423: Sound absorption and sound absorption coefficients by the reverberation room method** (ASTM International) - How a material's sound absorption coefficient is measured, the method behind the NRC figures acoustic-panel makers publish and the panel reviews quote. Reference: https://store.astm.org/c0423-23e01.html

## Review categories
- [Headphones](https://theaudiostuff.com/reviews/headphones/) - Open-back, closed-back, planar magnetic, dynamic, and IEMs. (30 reviews).
- [Speakers](https://theaudiostuff.com/reviews/speakers/) - Bookshelf and floorstanding, passive and active. (6 reviews).
- [DACs](https://theaudiostuff.com/reviews/dacs/) - Desktop R-2R ladder and delta-sigma DACs, budget to reference. (8 reviews).
- [Headphone Amps](https://theaudiostuff.com/reviews/headphone-amps/) - Desktop headphone amps and R-2R DAC/amp combos, balanced and streaming. (4 reviews).
- [Speaker Amps & Preamps](https://theaudiostuff.com/reviews/speaker-amps/) - Power amps, integrated amps, and line preamps for loudspeakers. (4 reviews).
- [Digital Sources](https://theaudiostuff.com/reviews/sources/) - Digital-to-digital converters and transports for hi-fi playback. (2 reviews).
- [Microphones & Recording](https://theaudiostuff.com/reviews/microphones/) - Condenser, tube, dynamic and USB microphones, plus audio interfaces. (4 reviews).
- [Accessories](https://theaudiostuff.com/reviews/accessories/) - Cables, power conditioning, network gear, and room treatment. (13 reviews).

## Every review, scored (by category, highest first)
The full catalogue with the 0-10 score, verdict tier, and price for each piece - the same data served as CSV at https://theaudiostuff.com/ratings.csv and JSON at https://theaudiostuff.com/ratings.json, under CC BY 4.0.

### Headphones (30)
- [HIFIMAN HE1000se](https://theaudiostuff.com/reviews/hifiman-he1000se/) - 9.3/10, Reference, $1,700. An ex-$3,500 flagship, now $1,700: nanometer diaphragm, Stealth Magnets, a holographic soundstage, and state-of-the-art detail - bright, honest, merciless with bad sources.
- [HIFIMAN Arya Organic](https://theaudiostuff.com/reviews/hifiman-arya-organic/) - 9.2/10, Highly Recommended, $1,099. A continuation of the Arya series at $1,300 (or $1,100 on sale) - the most resolving headphone at this price, with spectacular detail and bass you can feel.
- [HIFIMAN Arya Unveiled](https://theaudiostuff.com/reviews/hifiman-arya-unveiled/) - 9.1/10, Highly Recommended, $1,299. An open-back planar that strips away the outer grill entirely - exposing the driver to deliver dead-silent backgrounds, holographic imaging, and the smoothest Arya treble yet.
- [HIFIMAN Sundara](https://theaudiostuff.com/reviews/hifiman-sundara/) - 9.0/10, Highly Recommended, $299. An amazing value proposition - the latest Sundara revision performs exceptionally well at $299 in the open-back planar market. It's just a steal.
- [OLLO Audio X1](https://theaudiostuff.com/reviews/ollo-audio-x1/) - 8.9/10, Highly Recommended, $549. An open-back studio reference headphone with AI-assisted per-unit calibration (±1dB), modular design, real wood cups, and a flat tuning that works for both mixing and music.
- [HIFIMAN Ananda Stealth](https://theaudiostuff.com/reviews/hifiman-ananda-stealth/) - 8.8/10, Highly Recommended, $359. An overlooked HIFIMAN planar at $359 with a slightly warm tonality, fantastic imaging, and a 'pleasantly wet' sound that beats the Edition XS in almost every way.
- [HIFIMAN RE2000 PRO Silver](https://theaudiostuff.com/reviews/hifiman-re2000-pro-silver/) - 8.8/10, Highly Recommended, $349. An older HIFIMAN flagship IEM with the same topology driver as the RE800 but a CNC-machined aluminum shell - by far the most detailed IEM I've ever heard at $349.
- [HIFIMAN Arya Stealth](https://theaudiostuff.com/reviews/hifiman-arya-stealth/) - 8.7/10, Highly Recommended, $759. An exceptionally comfortable HIFIMAN flagship at $759 with a rare warm-leaning balance, unbeatable imaging, and a taste of high-end sound at a non-flagship price.
- [HIFIMAN Edition XS](https://theaudiostuff.com/reviews/hifiman-edition-xs/) - 8.7/10, Highly Recommended, $269. An exceptional open-back planar at $269 with a sound signature that's hard to find elsewhere - held back only by a controversial headband design choice.
- [Meze 105 Silva](https://theaudiostuff.com/reviews/meze-105-silva/) - 8.7/10, Highly Recommended, $499. A $499 open-back dynamic with hand-polished walnut cups, a custom 50mm carbon fiber-reinforced dome driver, and a warm, fun, easy-to-drive tuning that punches well above its price.
- [HIFIMAN Ananda Nano](https://theaudiostuff.com/reviews/hifiman-ananda-nano/) - 8.6/10, Highly Recommended, $499. A nanometer-thickness diaphragm trickled down into the Ananda line - one of the best picks in its price range, with detailed treble that can occasionally cross the line.
- [HIFIMAN HE1000 Stealth](https://theaudiostuff.com/reviews/hifiman-he1000-stealth/) - 8.5/10, Highly Recommended, $1,119. A years-old HIFIMAN flagship, cheaper than ever: Stealth Magnets, a nanometer diaphragm, a wide open soundstage, and a fun, bright tuning - mind the treble peaks and the large fit.
- [Kiwi Ears Belle, Cadenza II, Orchestra II](https://theaudiostuff.com/reviews/kiwi-ears-belle-cadenza-orchestra/) - 8.1/10, Recommended, $30 to $350. Three Kiwi Ears IEMs head-to-head - the $30 Belle with a mic, the $50 Cadenza II with KARS 2.0, and the 10-BA $350 Orchestra II flagship. Which is the value pick?
- [Sivga Luan](https://theaudiostuff.com/reviews/sivga-luan/) - 8.1/10, Recommended, $299. A semi-open dynamic with real wood cups and a natural, chocolatey midrange - $360 at launch, now $299.
- [Flare Audio E-PROTOTYPE](https://theaudiostuff.com/reviews/flare-audio-e-prototype/) - 8.0/10, Recommended, $149. Unlike anything you've heard or seen. The E-PROTOTYPE goes to extremes - both positive and negative - using proprietary technologies you won't find anywhere else.
- [HIFIMAN RE800 Silver](https://theaudiostuff.com/reviews/hifiman-re800-silver/) - 8.0/10, Recommended, $99. An older flagship IEM with topology driver tech, now $100 (down from $600) - audiophile-grade performance with surprisingly wide staging and an interesting non-target tuning.
- [Kiwi Ears Orchestra Lite](https://theaudiostuff.com/reviews/kiwi-ears-orchestra-lite/) - 8.0/10, Recommended, $249. An 8-balanced-armature IEM with a 3-way crossover at $249 - mid-forward, naturally warm, with depth-focused staging that's the opposite of most IEMs in its class.
- [Sivga Anser](https://theaudiostuff.com/reviews/sivga-anser/) - 8.0/10, Recommended, $199. A $199 open-back dynamic with real wood cups and a tuning that delivers springy, bouncy mid-bass you won't find on $2,000 headphones - musical, fun, and built to last.
- [Verum Audio Verum 1](https://theaudiostuff.com/reviews/verum-audio-verum-1/) - 8.0/10, Recommended, $349. A $349 open-back planar that goes the opposite direction from most of the market - smooth, refined highs, full warm mids, and ruler-flat bass to 20Hz.
- [Kiwi Ears Atheia](https://theaudiostuff.com/reviews/kiwi-ears-atheia/) - 7.9/10, Recommended, $349. A closed-back hybrid headphone pairing a 50mm dynamic driver with a 14.5mm planar - dynamic slam on the bottom, planar speed on top, in a walnut and aluminum chassis.
- [HIFIMAN Svanar Wireless](https://theaudiostuff.com/reviews/hifiman-svanar-wireless/) - 7.8/10, Recommended, $499. A $499 single dynamic driver TWS with an R2R DAC and LDAC. It's both lacking and feature-packed at the same time - and it actually delivers where it matters.
- [Sivga Robin SV021](https://theaudiostuff.com/reviews/sivga-robin-sv021/) - 7.8/10, Recommended, $149. A $149 closed-back dynamic with real wood earcups, masterpiece-level build, and a fun, exciting V-shaped sound that breaks the 'budget closed-back' mold.
- [HIFIMAN HE400se](https://theaudiostuff.com/reviews/hifiman-he400se/) - 7.6/10, Recommended, $109. A stupidly cheap open-back planar with Stealth Magnets technology at $109 - loved by some, criticized by others. So what's actually going on with it?
- [Simgot EM6L](https://theaudiostuff.com/reviews/simgot-em6l/) - 7.6/10, Recommended, $109. A budget hybrid IEM with 1 dynamic + 4 BA drivers, a 3-way crossover, and an attempt at the Harman 2019 target - mostly successful, with a fun 'weirdly big' soundstage.
- [Sivga SV021 Pro](https://theaudiostuff.com/reviews/sivga-sv021-pro/) - 7.6/10, Recommended, $179. A $179 wood-earcup closed-back with a fun, bass-forward sound. A revised driver fixes the original's treble sibilance, though isolation and midrange refinement still lag.
- [OneOdio Max 1](https://theaudiostuff.com/reviews/oneodio-max-1/) - 7.0/10, Mixed, €179. Hi-Res certified wireless over-ears with LDAC, a 20ms ultra-low-latency wireless DJ mode, dual jacks, and 120 hours of battery life - all for €179.
- [HIFIMAN HE-R9](https://theaudiostuff.com/reviews/hifiman-he-r9/) - 6.9/10, Mixed, $199. Both terrible and amazing at the same time - the HE-R9 is a closed-back bass monster at $199 with a tuning that's either perfect for you, or completely wrong.
- [KBEAR KB02](https://theaudiostuff.com/revie

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