Astell&Kern A&ultima SP4000T Review: Output Power, SNR and THD Against Its Peers
Astell&Kern A&ultima SP4000T (Portable Player), reference price $4299. Specs and connectivity only — no listening impressions.
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57 Reviews
Headphone Reviews
Original content based on public specs and blind-test reasoning — never copied from other reviewers.
iFi Audio UP Play Max Review: Output Power, SNR and THD Against Its Peers
iFi Audio UP Play Max (Bluetooth Transmitter), reference price $89. Specs and connectivity only — no listening impressions.
Read more →iFi Audio iCAN PHANTOM 1.5 Review: Output Power, SNR and THD Against Its Peers
iFi Audio iCAN PHANTOM 1.5 (Headphone Amp), reference price $3749, maker-rated output power >15000 mW @16Ω (Balanced) / >5760 mW @16Ω (UnBAL), SNR >145 dB(A). Specs and connectivity only — no listening impressions.
Read more →iFi Audio iDSD GR 2 MT Review: Output Power, SNR and THD Against Its Peers
iFi Audio iDSD GR 2 MT (DAC/Amp), reference price $699, maker-rated output power 1513 mW @32Ω (Bal, 6.94V), SNR 115 dBA. Specs and connectivity only — no listening impressions.
Read more →FiiO K13 Review: Output Power, SNR and THD Against Its Peers
FiiO K13 (DAC/Amp), reference price $320, maker-rated output power 2400 mW + 2400 mW @32Ω, SNR ≥124 dB (A-weighted). Specs and connectivity only — no listening impressions.
Read more →Apple AirPods 4 Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the Apple AirPods 4 is $129（4.7 g / 30 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Nothing Ear (2) Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the Nothing Ear (2) is $149（4.5 g / 36 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Edifier NeoBuds Pro 2 Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the Edifier NeoBuds Pro 2 is $149（5.4 g / 24 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Moondrop May Review: Specs and driving demands, and Three Same-Price Rivals
The reference price of the Moondrop May is $149（20 Ω / 110 dB / 5 g）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Beyerdynamic DT 990 PRO 250 Review: Specs and driving demands, and Three Same-Price Rivals
The reference price of the Beyerdynamic DT 990 PRO 250 is $179（250 Ω / 96 dB / 250 g）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Audio-Technica ATH-M50xBT2 Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the Audio-Technica ATH-M50xBT2 is $199（38 Ω / 99 dB / 307 g / 50 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Sony LinkBuds S Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the Sony LinkBuds S is $199（4.8 g / 20 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →AKG N700NC M2 Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the AKG N700NC M2 is $199（280 g / 23 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →SteelSeries Arctis Nova 7 Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the SteelSeries Arctis Nova 7 is $229（325 g / 38 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Audeze Maxwell Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the Audeze Maxwell is $299（28 Ω / 95 dB / 490 g / 80 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →FiiO FT3 Review: Specs and driving demands, and Three Same-Price Rivals
The reference price of the FiiO FT3 is $299（350 Ω / 105 dB / 430 g）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Sennheiser HD 490 Pro Review: Specs and driving demands, and Three Same-Price Rivals
The reference price of the Sennheiser HD 490 Pro is $399（130 Ω / 108 dB / 260 g）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →FiiO FT5 Review: Specs and driving demands, and Three Same-Price Rivals
The reference price of the FiiO FT5 is $499（36 Ω / 100 dB / 459 g）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Sennheiser IE 600 Review: Specs and driving demands, and Three Same-Price Rivals
The reference price of the Sennheiser IE 600 is $599（18 Ω / 118 dB / 6 g）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Soundcore Liberty 4 NC Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the Soundcore Liberty 4 NC is $99（5.6 g / 50 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Etymotic ER2XR Review: Specs and driving demands, and Three Same-Price Rivals
The reference price of the Etymotic ER2XR is $149（15 Ω / 99 dB / 5 g）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Apple AirPods Pro 2 Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the Apple AirPods Pro 2 is $249（5.3 g / 30 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Etymotic ER4XR Review: Specs and driving demands, and Three Same-Price Rivals
The reference price of the Etymotic ER4XR is $299（45 Ω / 99 dB / 6 g）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Sennheiser Momentum True Wireless 4 Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the Sennheiser Momentum True Wireless 4 is $299（107 dB / 5.2 g / 30 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Sony WF-1000XM5 Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the Sony WF-1000XM5 is $299（16 Ω / 102 dB / 5.9 g / 24 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →JBL Tour One M3 Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the JBL Tour One M3 is $329（288 g / 65 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →HiFiMAN HE1000se Review: Specs and driving demands, and Three Same-Price Rivals
The reference price of the HiFiMAN HE1000se is $1999（96 dB / 450 g）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Truthear Hexa Review: Specs and driving demands, and Three Same-Price Rivals
The reference price of the Truthear Hexa is $79（21 Ω / 110 dB / 7.3 g）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Moondrop Aria 2 Review: Specs and driving demands, and Three Same-Price Rivals
The reference price of the Moondrop Aria 2 is $79（20 Ω / 108 dB / 5 g）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Sony WH-CH720N Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the Sony WH-CH720N is $99（192 g / 50 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Sony WH-ULT900N Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the Sony WH-ULT900N is $199（255 g / 50 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Marshall Motif II A.N.C. Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the Marshall Motif II A.N.C. is $199（4.3 g / 30 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Bose QC Earbuds Review: specs, ANC and battery, and Three Same-Price Rivals
The reference price of the Bose QC Earbuds is $199（6.2 g / 24 hours）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Sony MDR-MV1 Review: Specs and driving demands, and Three Same-Price Rivals
The reference price of the Sony MDR-MV1 is $499（24 Ω / 100 dB / 223 g）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Sennheiser IE 200 Review: Specs and driving demands, and Three Same-Price Rivals
The reference price of the Sennheiser IE 200 is $149（18 Ω / 119 dB / 4 g）. This review uses published specs and same-price comparisons only, to show where it sits and who it is for.
Read more →Sennheiser HD 600 Review: Still Worth It at 300 Ω in 2026?
At 300 Ω it has the 6th highest impedance of the 62 over-ears that publish one, and 97 dB sensitivity makes an amplifier a practical requirement. Here is how it compares with the HD 490 Pro, MM-100 and ATH-R70xa.
Read more →Sony WH-1000XM6 Review: Specs, Driving Demands and Three Rivals at $449
The WH-1000XM6 ties for the highest impedance of the wireless over-ears we track at 48 Ω, yet weighs 250 g — the lightest 20%. This review uses published specs and same-price comparisons only, weaknesses and alternatives included.
Read more →Kaisheng DM7 Review: A Flathead Tribute to the Classic CM7
Kaisheng DM7 was launched in 2024, positioned as a thousand-yuan-level open-back flathead earbud, with its naming and de
Read more →Kaisheng DM7Ti Review: A Titanium Flathead Flagship
The Kaisheng DM7Ti, released in 2024, is the all-titanium flagship model in the DM7 series. As an open-back flathead ear
Read more →Sony WH-1000XM5 Review: A New Kind of ANC Comfort
The WH-1000XM5, released in 2022, represents another significant iteration in Sony's flagship noise-canceling over-ear h
Read more →Sony WF-1000XM6 Review: Pocket-Sized ANC Ceiling
In 2025, Sony officially launched the WF-1000XM6, continuing the series' flagship positioning in the true wireless noise
Read more →Sennheiser Momentum 4 Review: A 60-Hour Travel Companion
The Sennheiser Momentum 4 Wireless, released in 2022, is positioned as the successor to the brand's flagship wireless ov
Read more →Focal Bathys Review: French High-End Goes Wireless
The birth of the Focal Bathys marks a formal declaration of war by a traditional French high-end manufacturer on the wir
Read more →Sennheiser HD 660S2 Review: Classic Dynamics, Modern Bass
In 2023, Sennheiser launched the HD 660S2 building upon the HD 660S. This headphone is not a simple iteration but a dire
Read more →Truthear Zero:RED Review: Curve-Approved Vocals on a Budget
The Truthear Zero:RED was released in mid-2023 as the second collaborative product between Xingge and a well-known tuner
Read more →Bose QC Ultra Review: Immersive Audio Meets ANC
The release of the Bose QuietComfort Ultra Headphones marks a pivotal shift for Bose in the flagship noise-cancelling ov
Read more →Moondrop Chu II Review: A Refined New Entry Point
The Moondrop Chu II quietly hit the market in late 2024, positioned as an entry-level Hi-Fi wired earphone with an offic
Read more →AirPods Pro 3 Review: Apple's Most Capable Earbuds Yet
In 2025, Apple pushed the AirPods Pro series to new heights with an iteration that seemed "routine" on the surface but w
Read more →B&W Pi8 Review: Hi-Fi Ambition in a True Wireless
Bowers & Wilkins Pi8 was officially released in the summer of 2024, positioned as the brand's flagship true wireless noi
Read more →Samsung Galaxy Buds3 Pro Review: AI-Era Android TWS
In 2025, Samsung officially launched the Galaxy Buds3 Pro, a product explicitly positioned at the core of the Android ec
Read more →FiiO FT1 Review: A Wooden-Dynamic Value Surprise
The launch of the FiiO FT1 marks a heavyweight bombshell thrown into the traditional over-ear headphone market by a brand that has
Read more →HiFiMAN Edition XS Review: Planar Sound at Entry Prices
The HiFiMAN Edition XS, released in 2021, is positioned as the brand's most affordable open-back planar magnetic over-ea
Read more →HiFiMAN Sundara Review: The Budget Planar Evergreen
In 2018, the HiFiMAN Sundara was officially released, at a time when the planar headphone market was transitioning from
Read more →Audeze LCD-5 Review: A Flagship Planar Resolution Statement
The Audeze LCD-5, released in 2021, marks a radical shift for the brand in the flagship planar headphone arena. It aband
Read more →Beyerdynamic DT 900 PRO X Review: Modernised Open Monitoring
Beyerdynamic DT 900 PRO X was released in 2021 as part of the brand's PRO X series aimed at professional recording and m
Read more →Grado SR80x Review: American Energy, Old-School Rock Soul
In 2021, Grado fully upgraded its classic SR series to the x generation, and the SR80x is the pivotal model bridging the
Read more →Meze 109 Pro Review: Beauty and Brawn in an Open Dynamic
The Meze 109 Pro, released in 2022, is a heavyweight move by Romanian brand Meze Audio between its flagship planar headp
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