Speakers review
HEDD Type 05 MK2
A 5-inch active monitor that reaches useful 40 Hz in-room and pairs a handmade AMT tweeter with a DSP toolkit thorough enough to tune it to the room from the listening chair.
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Audio reviews, measurements, news, and technical analysis focused on products that deliver meaningful engineering and listening performance.
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Latest reviews
Headphones review
HEDD Audio HEDDphone TWO GT
A full-range AMT flagship whose midrange and treble need no correction at all, bought at the cost of demanding amplification, 550g on the head, and a soundstage that is the one clear limit.
Amplifiers review
FiiO EA13
A pure Class A push-pull EL34 amplifier whose tube character is real and correctly shaped — elevated second harmonic, odd-order harmonics left alone — bought at the cost of 260W at the wall, significant heat, and a headphone output that should not be relied on.
Amplifiers review
Aiyima A20 Mono
A true dual-mono TPA3255 power amplifier whose PFFB implementation is correct and demonstrable in-room, with 2.1 integration and a 12V trigger that are properly thought through rather than tokenistic.
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Latest news
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I have never seen headphones like this before - Estatron headphones overview at CanJam SoCal 2026
Source: The Headphone Show (YouTube) Why it is interesting: * The headphones were noted by Fc-Construct as among the most unique units observed at CanJam SoCal 2026. * The design and constru
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FiiO K11 R2R DAC: Affordable R-2R desktop DAC & headphone amp. Let's talk about R-2R and euphonic preferences.
Source: Archimago Why it is interesting: * Utilizes an R-2R resistor network architecture rather than the standard delta-sigma method. * Targets the specific nic
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Audio by Van Alstine ABX Comparator Review
Source: Audio Science Review Please provide the feed text for the “Audio by Van Alstine ABX Comparator Review” so I can perfor
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Soulnote A-3 Core power amplifier Measurements
Source: Stereophile Why it is interesting: * The source text identifies the product specifically as the Soulnote A-3 Core power amplifier. * The content
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Ep. 88: “I Was Expecting Some Nina Totenberg”
Source: Audio Unleashed (YouTube) Why it is interesting: * Explores whether high-end audio marketing relies on exaggerated claims regarding “missing” bass harmonics or “audible” distortion
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Moondrop GM-01 Pro Review: The Best Gaming Headset Under $100
Source: Headphones.com Why it is interesting: * Priced at $50, positioning it as a budget-tier entry for gaming. * Features “smart” V-shap
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Technical articles
Technical analysis
A Smooth Slope Is Not One Universal Target
A smooth downward trend may be a useful reference across transducer types, but the correct slope depends on how each device couples to listeners, rooms, and reflections.
Technical explainer
When Distortion Becomes a Listening Question
Distortion audibility depends on level, frequency, programme material, listener, and the kind of distortion—not a single percentage.
Editorial analysis
What Measurements Are For
Measurements are powerful evidence, but their useful role is decision-making—not replacing listening, context, or judgement.
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Review categories
Equipment, software, and measurement tools—organised without the colourful tile wall.