--- title: "Jakub Charkiewicz - Founder & lead reviewer - The Audio Stuff" description: "Jakub Charkiewicz, founder & lead reviewer at The Audio Stuff. 66 reviews across 8 categories, each with its verdict, buying guides and background." url: "https://theaudiostuff.com/authors/jakub-charkiewicz/" type: "profile" author: "Jakub Charkiewicz" --- > Markdown rendering of https://theaudiostuff.com/authors/jakub-charkiewicz/ > Canonical URL to cite: https://theaudiostuff.com/authors/jakub-charkiewicz/ > Generated from the published page. Text and links only; see the HTML for layout. Breadcrumb: [Home](https://theaudiostuff.com/) > [Authors](https://theaudiostuff.com/authors/) > Jakub Charkiewicz ![Jakub Charkiewicz](https://theaudiostuff.com/images/jakub-charkiewicz-224w.avif) Founder & lead reviewer # Jakub Charkiewicz Jakub Charkiewicz is a technology entrepreneur, content creator and audio reviewer based in Warsaw, Poland, and the founder and managing director of The Audio Stuff. - [@TheAudioStuff](https://www.youtube.com/@TheAudioStuff) - [LinkedIn](https://www.linkedin.com/in/jakub-charkiewicz) - [Email Jakub](https://theaudiostuff.com/contact/#writer-jakub-charkiewicz) ## Jakub by the numbers {#author-stats-title} - **Reviews**: 66 - **Buying guides**: 12 - **Categories**: 8 - **Brands**: 31 - **Writing since**: May 2023 Figures as of Sep 26, 2026, the day Jakub's latest piece was published. ## About Jakub {#author-bio-title} I founded The Audio Stuff in 2023 and run it as managing director. I write, listen to, score and sign off every review that carries my name, and I present the reviews on the publication's YouTube channel. My approach to business and to content comes from a lifelong passion for science and physics. That analytical habit is what lets me understand software, acoustics and digital platforms at a fundamental level. Put together with the commercial side of the work, it lets me break the technical detail down for the people reading and watching, build digital campaigns and grow active online communities around them. Alongside the reviews, my company works in e-commerce, marketing and distributing software licenses online, and I run its social media. My core expertise is business leadership and team management: scaling operations, streamlining e-commerce workflows and mentoring the people I work with. Whether it is the physical properties of sound in a new review, the numbers behind a marketing funnel or the next business decision, I enjoy solving complex problems, and I am always glad to hear from other digital entrepreneurs, tech innovators and creators. ### Areas of expertise - Audiophile headphones - planar magnetic, dynamic, electrostatic, IEMs - Hi-fi loudspeakers and studio monitors - R-2R and delta-sigma digital-to-analog converters - Headphone amplifiers and integrated amps - Class A, AB, D, and tube - Room acoustics, standing-wave measurement, and bass treatment - ABX double-blind testing methodology and audio measurement - The audio industry as a business - ownership, acquisitions and product launches ## Jakub's reviews {#author-work-title} 66 reviews across 8 categories, published Jun 2023 to Sep 2026. Every one has a video on the channel. The reference chain and listening room they are heard on are described in [How we test](https://theaudiostuff.com/about/how-we-test/). ### Verdicts given - Reference 3 of 66 reviews - Highly Recommended 24 of 66 reviews - Recommended 34 of 66 reviews - Mixed 5 of 66 reviews - Pass 0 of 66 reviews Each verdict has a published [score band](https://theaudiostuff.com/about/#verdict-scale). ### [Headphones](https://theaudiostuff.com/reviews/headphones/) 28 - [HIFIMAN HE1000se review](https://theaudiostuff.com/reviews/hifiman-he1000se/) published Jul 2026 Reference scored 9.3 out of 10 - [HIFIMAN HE1000 Stealth review](https://theaudiostuff.com/reviews/hifiman-he1000-stealth/) published Jun 2026 Highly Recommended scored 8.5 out of 10 - [Meze 105 Silva review](https://theaudiostuff.com/reviews/meze-105-silva/) published May 2026 Highly Recommended scored 8.7 out of 10 - [HIFIMAN Arya Unveiled review](https://theaudiostuff.com/reviews/hifiman-arya-unveiled/) published Mar 2026 Highly Recommended scored 9.1 out of 10 - [Kiwi Ears Atheia review](https://theaudiostuff.com/reviews/kiwi-ears-atheia/) published Dec 2025 Recommended scored 7.9 out of 10 - [HarmonicDyne Eris review](https://theaudiostuff.com/reviews/harmonicdyne-eris/) published Nov 2025 Mixed scored 6.8 out of 10 - [OLLO Audio X1 review](https://theaudiostuff.com/reviews/ollo-audio-x1/) published Aug 2025 Highly Recommended scored 8.9 out of 10 - [Sivga Anser review](https://theaudiostuff.com/reviews/sivga-anser/) published Jun 2025 Recommended scored 8.0 out of 10 - [KBEAR KB02 review](https://theaudiostuff.com/reviews/kbear-kb02/) published Apr 2025 Mixed scored 6.9 out of 10 - [OneOdio Max 1 review](https://theaudiostuff.com/reviews/oneodio-max-1/) published Apr 2025 Mixed scored 7.0 out of 10 - [Sivga Luan review](https://theaudiostuff.com/reviews/sivga-luan/) published Nov 2024 Recommended scored 8.1 out of 10 - [Verum Audio Verum 1 review](https://theaudiostuff.com/reviews/verum-audio-verum-1/) published Nov 2024 Recommended scored 8.0 out of 10 - [Kiwi Ears Orchestra Lite review](https://theaudiostuff.com/reviews/kiwi-ears-orchestra-lite/) published Sep 2024 Recommended scored 8.0 out of 10 - [HIFIMAN RE2000 PRO Silver review](https://theaudiostuff.com/reviews/hifiman-re2000-pro-silver/) published Sep 2024 Highly Recommended scored 8.8 out of 10 - [HIFIMAN RE800 Silver review](https://theaudiostuff.com/reviews/hifiman-re800-silver/) published Aug 2024 Recommended scored 8.0 out of 10 - [HIFIMAN Arya Organic review](https://theaudiostuff.com/reviews/hifiman-arya-organic/) published Jul 2024 Highly Recommended scored 9.2 out of 10 - [HIFIMAN Arya Stealth review](https://theaudiostuff.com/reviews/hifiman-arya-stealth/) published Jul 2024 Highly Recommended scored 8.7 out of 10 - [Sivga Robin SV021 review](https://theaudiostuff.com/reviews/sivga-robin-sv021/) published Jul 2024 Recommended scored 7.8 out of 10 - [HIFIMAN Ananda Nano review](https://theaudiostuff.com/reviews/hifiman-ananda-nano/) published Jun 2024 Highly Recommended scored 8.6 out of 10 - [HIFIMAN Ananda Stealth review](https://theaudiostuff.com/reviews/hifiman-ananda-stealth/) published Jun 2024 Highly Recommended scored 8.8 out of 10 - [Simgot EM6L review](https://theaudiostuff.com/reviews/simgot-em6l/) published May 2024 Recommended scored 7.6 out of 10 - [Flare Audio E-PROTOTYPE review](https://theaudiostuff.com/reviews/flare-audio-e-prototype/) published Jan 2024 Recommended scored 8.0 out of 10 - [HIFIMAN Svanar Wireless review](https://theaudiostuff.com/reviews/hifiman-svanar-wireless/) published Aug 2023 Recommended scored 7.8 out of 10 - [HIFIMAN Sundara Closed-back review](https://theaudiostuff.com/reviews/hifiman-sundara-closed-back/) published Jul 2023 Mixed scored 6.8 out of 10 - [HIFIMAN Sundara review](https://theaudiostuff.com/reviews/hifiman-sundara/) published Jul 2023 Highly Recommended scored 9.0 out of 10 - [HIFIMAN HE400se review](https://theaudiostuff.com/reviews/hifiman-he400se/) published Jun 2023 Recommended scored 7.6 out of 10 - [HIFIMAN HE-R9 review](https://theaudiostuff.com/reviews/hifiman-he-r9/) published Jun 2023 Mixed scored 6.9 out of 10 - [HIFIMAN Edition XS review](https://theaudiostuff.com/reviews/hifiman-edition-xs/) published Jun 2023 Highly Recommended scored 8.7 out of 10 ### [Speakers](https://theaudiostuff.com/reviews/speakers/) 6 - [Taga Harmony TAV-607F review](https://theaudiostuff.com/reviews/taga-harmony-tav-607f/) published Jun 2025 Recommended scored 7.9 out of 10 - [Taga Harmony TAV-500B v.2 review](https://theaudiostuff.com/reviews/taga-harmony-tav-500b-v2/) published Jan 2025 Recommended scored 7.9 out of 10 - [Triangle Australe EZ review](https://theaudiostuff.com/reviews/triangle-australe-ez/) published Jan 2025 Recommended scored 8.1 out of 10 - [Diora Acoustics Chors 5 review](https://theaudiostuff.com/reviews/diora-acoustics-chors-5/) published Oct 2024 Highly Recommended scored 8.5 out of 10 - [Taga Harmony DIAMOND B-60 v.3 review](https://theaudiostuff.com/reviews/taga-harmony-diamond-b60/) published Oct 2024 Recommended scored 8.2 out of 10 - [Triangle Borea BR09 review](https://theaudiostuff.com/reviews/triangle-borea-br09/) published Sep 2024 Recommended scored 8.0 out of 10 ### [DACs](https://theaudiostuff.com/reviews/dacs/) 8 - [Henry Audio DA 256 review](https://theaudiostuff.com/reviews/henry-audio-da-256/) published Sep 2026 Recommended scored 8.2 out of 10 - [Fosi Audio ZD3 review](https://theaudiostuff.com/reviews/fosi-audio-zd3/) published Sep 2025 Recommended scored 7.1 out of 10 - [Denafrips Enyo 15th Anniversary review](https://theaudiostuff.com/reviews/denafrips-enyo-15th/) published Dec 2024 Highly Recommended scored 9.1 out of 10 - [SMSL RAW-MDA1 review](https://theaudiostuff.com/reviews/smsl-raw-mda1/) published Dec 2024 Recommended scored 8.0 out of 10 - [SMSL PS200 review](https://theaudiostuff.com/reviews/smsl-ps200/) published Aug 2024 Recommended scored 7.0 out of 10 - [SMSL DL100 review](https://theaudiostuff.com/reviews/smsl-dl100/) published Aug 2024 Recommended scored 8.2 out of 10 - [SMSL DO100 PRO review](https://theaudiostuff.com/reviews/smsl-do100-pro/) published Jun 2024 Recommended scored 8.0 out of 10 - [SMSL PS100 review](https://theaudiostuff.com/reviews/smsl-ps100/) published Dec 2023 Recommended scored 7.0 out of 10 ### [Headphone Amps](https://theaudiostuff.com/reviews/headphone-amps/) 4 - [HIFIMAN Serenade review](https://theaudiostuff.com/reviews/hifiman-serenade/) published Jun 2026 Reference scored 9.3 out of 10 - [HIFIMAN EF500 review](https://theaudiostuff.com/reviews/hifiman-ef500/) published Jun 2025 Recommended scored 8.2 out of 10 - [HIFIMAN EF499 review](https://theaudiostuff.com/reviews/hifiman-ef499/) published Feb 2025 Recommended scored 8.1 out of 10 - [HIFIMAN EF400 review](https://theaudiostuff.com/reviews/hifiman-ef400/) published Feb 2024 Recommended scored 7.5 out of 10 ### [Speaker Amps & Preamps](https://theaudiostuff.com/reviews/speaker-amps/) 3 - [Denafrips Hades 12th review](https://theaudiostuff.com/reviews/denafrips-hades-12th/) published Aug 2025 Highly Recommended scored 9.0 out of 10 - [Tonewinner AD-1PA+ review](https://theaudiostuff.com/reviews/tonewinner-ad-1pa-plus/) published Jul 2025 Highly Recommended scored 9.0 out of 10 - [Tonewinner AD-2PRO+ review](https://theaudiostuff.com/reviews/tonewinner-ad-2pro-plus/) published Apr 2024 Highly Recommended scored 8.8 out of 10 ### [Digital Sources](https://theaudiostuff.com/reviews/sources/) 1 - [Denafrips Hermes 12th Anniversary review](https://theaudiostuff.com/reviews/denafrips-hermes-12th/) published Feb 2025 Highly Recommended scored 8.9 out of 10 ### [Microphones & Recording](https://theaudiostuff.com/reviews/microphones/) 3 - [Austrian Audio OC16 review](https://theaudiostuff.com/reviews/austrian-audio-oc16/) published Sep 2026 Highly Recommended scored 8.7 out of 10 - [t.bone SCT 2000 review](https://theaudiostuff.com/reviews/tbone-sct-2000/) published Jul 2025 Recommended scored 8.1 out of 10 - [Yellowtec PUC2 Mic LEA review](https://theaudiostuff.com/reviews/yellowtec-puc2-mic-lea/) published Aug 2024 Highly Recommended scored 8.6 out of 10 ### [Accessories](https://theaudiostuff.com/reviews/accessories/) 13 - [Synergistic Research Network Router UEF review](https://theaudiostuff.com/reviews/synergistic-research-network-router-uef/) published Aug 2026 Recommended scored 7.8 out of 10 - [Ortvik Parametric Tower review](https://theaudiostuff.com/reviews/ortvik-parametric-tower/) published Aug 2026 Highly Recommended scored 8.5 out of 10 - [Ekustik Woody Queen review](https://theaudiostuff.com/reviews/ekustik-woody-queen/) published Mar 2026 Highly Recommended scored 9.0 out of 10 - [Synergistic Research PowerCell 14 review](https://theaudiostuff.com/reviews/synergistic-research-powercell-14/) published Sep 2025 Reference scored 9.2 out of 10 - [DH Labs, iFi, Vera-Fi HiFi Tweaks Roundup review](https://theaudiostuff.com/reviews/audiophile-tweaks-that-work/) published May 2025 Recommended scored 7.8 out of 10 - [Taga Harmony PF-1000LPS review](https://theaudiostuff.com/reviews/taga-harmony-pf-1000lps/) published Jan 2025 Recommended scored 8.0 out of 10 - [AudioMica 4-all-in-1 Cable Set review](https://theaudiostuff.com/reviews/audiomica-4-all-in-1/) published Sep 2024 Highly Recommended scored 8.5 out of 10 - [Melodika Brown Sugar BSSC95xx review](https://theaudiostuff.com/reviews/melodika-bssc95/) published Aug 2024 Highly Recommended scored 8.5 out of 10 - [Melodika Brown Sugar BSSC4500 review](https://theaudiostuff.com/reviews/melodika-bssc4500/) published Jun 2024 Highly Recommended scored 8.2 out of 10 - [Monosaudio P902E6R + USB Cables review](https://theaudiostuff.com/reviews/monosaudio-p902e6r/) published Jun 2024 Recommended scored 7.8 out of 10 - [Melodika Brown Sugar BSSC3300 review](https://theaudiostuff.com/reviews/melodika-bssc3300/) published Mar 2024 Recommended scored 7.5 out of 10 - [Monosaudio AS-EU08 + SP-USB review](https://theaudiostuff.com/reviews/as-eu08-sp-usb/) published Mar 2024 Recommended scored 8.0 out of 10 - [Monosaudio PS75R1R, CAT 8, P903M0 review](https://theaudiostuff.com/reviews/monosaudio-cables/) published Jan 2024 Recommended scored 7.8 out of 10 ## Jakub's buying guides {#author-guides-title} - [Best Microphones](https://theaudiostuff.com/guides/best-microphones/) 3 ranked picks, top pick Austrian Audio OC16 (8.7). Published Sep 2026. - [Best Headphones Under $500](https://theaudiostuff.com/guides/best-headphones-under-500/) 8 ranked picks, top pick HIFIMAN Sundara (9.0). Published Sep 2026. - [Best Budget Headphones](https://theaudiostuff.com/guides/best-budget-headphones/) 4 ranked picks, top pick Sivga Anser (8.0). Published Aug 2026. - [Best Hi-Fi Accessories](https://theaudiostuff.com/guides/best-hifi-accessories/) 13 ranked picks, top pick Synergistic Research PowerCell 14 (9.2). Published Aug 2026. - [Best Speaker Amps and Preamps](https://theaudiostuff.com/guides/best-speaker-amps-and-preamps/) 3 ranked picks, top pick Tonewinner AD-1PA+ (9.0). Published Aug 2026. - [Best Speakers](https://theaudiostuff.com/guides/best-speakers/) 6 ranked picks, top pick Diora Acoustics Chors 5 (8.5). Published Aug 2026. - [Best DACs](https://theaudiostuff.com/guides/best-dacs/) 8 ranked picks, top pick Denafrips Enyo 15th Anniversary (9.1). Published May 2026. - [Best Headphone Amplifiers](https://theaudiostuff.com/guides/best-headphone-amplifiers/) 4 ranked picks, top pick HIFIMAN Serenade (9.3). Published May 2026. - [Best IEMs](https://theaudiostuff.com/guides/best-iems/) 7 ranked picks, top pick HIFIMAN RE2000 PRO Silver (8.8). Published May 2026. - [Best Open-Back Headphones](https://theaudiostuff.com/guides/best-open-back-headphones/) 14 ranked picks, top pick HIFIMAN HE1000se (9.3). Published May 2026. - [Best Planar Magnetic Headphones](https://theaudiostuff.com/guides/best-planar-magnetic-headphones/) 10 ranked picks, top pick HIFIMAN HE1000se (9.3). Published May 2026. - [Best Reference-Grade Audio Gear](https://theaudiostuff.com/guides/best-reference-grade-audio-gear/) 10 ranked picks, top pick HIFIMAN HE1000se (9.3). Published May 2026. ## Background {#author-cv-title} ### Experience 1. Apr 2023 to present Managing Director The Audio Stuff (self-employed) 2. Aug 2022 Software Engineer Intern INTRATEL Sp. z o.o. (internship) A one-month software development internship: designing, implementing and testing programming and database solutions for live IT systems, and writing their technical documentation. ### Education 1. Oct 2026 to Jun 2031 (in progress) Master's degree, Law University of Warsaw 2. Sep 2021 to Apr 2026 Technician degree, Computer Science Technikum Programistyczne INFOTECH A five-year technical program at a specialized programming high school, built on computer science and software development, with hands-on embedded-systems and hardware work through Arduino projects. ### Languages English (native or bilingual) and Polish (native or bilingual). ### Skills Statistics, Statistical Data Analysis, Data Analysis, Python (Programming Language), Software Development, Technical Documentation, Written Communication, Speech Writing, Presentation Skills and Public Speaking. ### Certificates - Kotlin Professional Certificate by JetBrains Issued by JetBrains, Oct 2026 - JavaScript Foundations Professional Certificate by Mozilla Issued by Mozilla, Oct 2026 - OpenEDG Python Institute: Programming with Python Professional Certificate Issued by OpenEDG Python Institute, Oct 2026 - Career Essentials in GitHub Professional Certificate Issued by GitHub, Sep 2026 - Machine Learning Statistical Foundations Professional Certificate by Wolfram Research Issued by Wolfram, Aug 2026 - Anaconda Python for Data Science Professional Certificate Issued by Anaconda, Aug 2026 - Career Essentials in Data Analysis by Microsoft and LinkedIn Issued by Microsoft, Jul 2026 - Statistics Foundations Professional Certificate by Wolfram Research Issued by Wolfram, Jul 2026 - Business Writing Professional Certificate by Grammarly Issued by Grammarly, Jul 2026 - Public Speaking Skills Professional Certificate by Toastmasters International Issued by Toastmasters International, Jul 2026 - telc English B1 Issued by telc gGmbH, Mar 2023, credential ID 4250842 Passed with a "Very Good" overall grade, the highest available. - PCEP - Certified Entry-Level Python Programmer Issued by OpenEDG Python Institute, Jun 2022, credential ID VkF8.ETBX.qPEd Python fundamentals: programming concepts, data structures and algorithms. ## Corrections {#author-policy-title} 22 corrections have been logged on Jakub's reviews, each on the review it corrects with the date it shipped: ### Sep 27, 2026 - [Synergistic Research Network Router UEF review](https://theaudiostuff.com/reviews/synergistic-research-network-router-uef/) The linear power supply was described as adapted from the Galileo PowerCell; Synergistic Research describes it as similar to its SR LPS UEF. The box contents are corrected to the 5 ft Foundation 12 AWG power cable and the installed SR Pink Fuse; the MiG 4.0 footers are now described as having come with the review unit, since Synergistic Research does not list them in the standard box. - [HIFIMAN Serenade review](https://theaudiostuff.com/reviews/hifiman-serenade/) Weight corrected from about 3 kg to 3.9 kg, and Bluetooth removed from the inputs: the unit reviewed is the non-Bluetooth Serenade, which has no antenna socket, per HIFIMAN's published specifications. The DAC is also described as HIFIMAN specifies it, a 24-bit Himalaya Pro module that accepts up to 32-bit/768 kHz and DSD512 over the network. - [Meze 105 Silva review](https://theaudiostuff.com/reviews/meze-105-silva/) Weight corrected from 350 g to 354 g, and the driver described as Meze does (a carbon fiber-reinforced cellulose W-dome with a titanium-coated torus, not a carbon-fiber driver), to match Meze's published specifications. - [Synergistic Research PowerCell 14 review](https://theaudiostuff.com/reviews/synergistic-research-powercell-14/) Weight corrected from 12 kg to 12.7 kg (28 lb), to match Synergistic Research's published specifications; dimensions added from the same specifications. - [Tonewinner AD-1PA+ review](https://theaudiostuff.com/reviews/tonewinner-ad-1pa-plus/) Specifications corrected to Tonewinner's own: 330 W per channel into 8 ohms (the 100 W Class A, 300 W Class AB and 500 W into 4 ohm figures were a dealer's), 42 kg, THD 0.008%, SNR 115 dB (108 dB balanced), 10 Hz - 100 kHz, 4-8 ohm loads rather than 2 ohms, a 260-300 W draw in Class A rather than 1200 W, and 16 output transistors for 120 A. The amplifier also has an auto-switch mode, so the con saying it had none was removed. - [Taga Harmony TAV-607F review](https://theaudiostuff.com/reviews/taga-harmony-tav-607f/) Frequency response corrected from 44 Hz - 25 kHz to 40 Hz - 25 kHz; power handling from 120 W RMS (240 W peak) to 90 W RMS, with 20-120 W as the recommended amplifier power and no peak figure; the reflex port from rear to front; and the 6.5-inch midrange added to the driver list - all to match Taga Harmony's published specifications. - [Taga Harmony PF-1000LPS review](https://theaudiostuff.com/reviews/taga-harmony-pf-1000lps/) The PF-1000LPS was called a power conditioner; Taga classes it as a power noise filter (its PC series are its conditioners), so the title, description and product type now say filter. Weight and dimensions added from Taga's specifications. - [Triangle Australe EZ review](https://theaudiostuff.com/reviews/triangle-australe-ez/) Weight corrected from 40 kg (90 lb) to 38.8 kg (85.5 lb) per speaker, to match Triangle's published specifications; dimensions added from the same specifications. - [Verum Audio Verum 1 review](https://theaudiostuff.com/reviews/verum-audio-verum-1/) Sensitivity corrected from 96 to 107 dB/mW, to match Verum Audio's published specifications; weight added from Verum Audio's specifications. - [AudioMica 4-all-in-1 Cable Set review](https://theaudiostuff.com/reviews/audiomica-4-all-in-1/) Cable diameters corrected from 11.5 mm for the power cable, with the speaker cable about 1 mm thicker, to about 12.5 mm for the power cable and about 12 mm for the speaker cable, to match AudioMica's published specifications. - [Triangle Borea BR09 review](https://theaudiostuff.com/reviews/triangle-borea-br09/) Weight corrected from 23 kg to 23.4 kg per speaker, to match Triangle's published specifications; dimensions added from the same specifications. - [Yellowtec PUC2 Mic LEA review](https://theaudiostuff.com/reviews/yellowtec-puc2-mic-lea/) Dynamic range corrected from 114 dB to 108 dB, to match Yellowtec's published specifications. - [HIFIMAN Ananda Stealth review](https://theaudiostuff.com/reviews/hifiman-ananda-stealth/) Weight corrected from 400 g to 398 g, to match HIFIMAN's published specifications. - [SMSL DO100 PRO review](https://theaudiostuff.com/reviews/smsl-do100-pro/) Weight corrected from 1.5 kg to 1.45 kg, to match SMSL's published specifications. - [Tonewinner AD-2PRO+ review](https://theaudiostuff.com/reviews/tonewinner-ad-2pro-plus/) Weight corrected from 40 kg to 35.9 kg (about 79 lb) net, to match Tonewinner's published specifications. - [Melodika Brown Sugar BSSC3300 review](https://theaudiostuff.com/reviews/melodika-bssc3300/) The review said this cable uses Melodika's Multi-Gauge Core. Melodika specifies the BSSC3300 as spiral LITZ with single-gauge strands (Melodika lists Multi-Gauge Core for other models in the range, such as the BSSC50), so that claim, its FAQ and its pro were removed and the construction corrected to Melodika's specification. - [HIFIMAN EF400 review](https://theaudiostuff.com/reviews/hifiman-ef400/) Weight corrected from 3 kg to 3.08 kg, to match HIFIMAN's published specifications. - [SMSL PS100 review](https://theaudiostuff.com/reviews/smsl-ps100/) The claim that the PS100 is limited to 16-bit is withdrawn: SMSL specifies 24-bit/192 kHz over optical and coaxial and 44.1-48 kHz over USB, and rates the dynamic range at 96 dB. The con, the FAQ and the specifications section now say so; weight added from SMSL's specifications. - [HIFIMAN Svanar Wireless review](https://theaudiostuff.com/reviews/hifiman-svanar-wireless/) LDAC's ceiling corrected from 24-bit/192 kHz to 24-bit/96 kHz, and the codec list corrected to LDAC, AAC and SBC, to match HIFIMAN's published specifications and owner's guide. - [HIFIMAN Sundara review](https://theaudiostuff.com/reviews/hifiman-sundara/) Weight corrected from 372 g to 342 g and sensitivity from 94 to 92 dB/mW, to match HIFIMAN's published specifications. - [HIFIMAN HE-R9 review](https://theaudiostuff.com/reviews/hifiman-he-r9/) Impedance corrected from 32 to 60 ohms, to match HIFIMAN's published specifications; frequency response, weight and connector added from HIFIMAN's specifications. - [HIFIMAN Edition XS review](https://theaudiostuff.com/reviews/hifiman-edition-xs/) Weight corrected from 400 g to 405 g, to match HIFIMAN's published specifications; impedance, sensitivity and frequency response added from HIFIMAN's specifications. All 66 of Jakub's reviews carry a [Checked](https://theaudiostuff.com/about/dates/) stamp, the most recent from Oct 3, 2026. Spotted an error in one of Jakub's reviews? [Report it](https://theaudiostuff.com/contact/#report-correction); every report reaches the person who wrote the review. How the publication stays independent is on [About](https://theaudiostuff.com/about/#ethics-title), and how a byline works on [Authors](https://theaudiostuff.com/authors/).