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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-24 · 7 min read · Independent comparison
• Sony MDR1ADAC/B — biggest strength: An integrated Hi-Res DAC and amplifier built right into the headphones, with PCM up to 192kHz/24-bit and DSD 2.8/5.6MHz decoding, so almost any digital source can feed it a high-resolution signal.
• Sony MDR1ADAC/B — biggest trade-off: It's a wired, over-ear headphone at 300 g with no wireless connectivity and no noise cancelling, so it's a sit-down or commute-with-a-cable product, not a gym or truly wireless one.
• HIFI WALKER H2 — biggest strength: A self-contained local music player with an ESS ES9018K2M DAC, a MAX97220A headphone amp, 128GB of included microSD storage (expandable to 512GB) and up to 10 hours of battery.
• HIFI WALKER H2 — biggest trade-off: It plays local files, not streams — you supply and manage your own library, and it's a player first rather than a premium full-size headphone.
• Pick Sony MDR1ADAC/B if you already have good sources and want the headphones themselves to do the decoding and amplification.
• Pick HIFI WALKER H2 if you want to unplug from your phone and carry a dedicated, offline hi-res library in your pocket.
The MDR1ADAC/B is unusual because the DAC and amplifier live inside the headphones. Feed it a digital signal over USB from a PC, a Walkman, an Xperia phone or an Apple device with the supplied Lightning connector, and it decodes that signal internally rather than leaning on whatever chip your source happens to have. It handles PCM up to 192kHz/24-bit and DSD at 2.8MHz and 5.6MHz, with an asynchronous USB clock intended to keep timing accurate and the soundstage intact. Around that sits a 40 mm ALCP (Aluminum Liquid Crystal Polymer) dynamic driver with a claimed frequency range of 3 Hz to 100 kHz — the top figure being the Hi-Res Audio headroom rather than anything you'll consciously hear.
The rest of the design is built for long listening. The over-ear, enfolding structure wraps around the ear for an acoustic seal, the urethane cushions are pressure-relieving, and the hanger axis sits inside the driver housing for fit stability. There's a silver-coated OFC cable, Beat Response Control for bass and transient response, and silent joints so the frame doesn't creak. Battery life is rated at up to 7.5 hours, and — importantly — it also runs passively as a normal corded headphone with no battery at all, using a standard 3.5 mm jack. Auto input select switches between iOS, USB, Walkman and Xperia sources, and analog input is supported too.
So who should buy it? Someone who wants one pair of wired headphones that makes a laptop, phone and portable player all sound meaningfully better, and who values comfort and a sealed over-ear fit for desk work, travel or long sessions. Who should skip it? Anyone who wants wireless freedom, active noise cancelling or a featherweight set for the gym — the MDR1ADAC/B is a wired 300 g over-ear with no noise control and no Bluetooth, and that's a deliberate trade for the built-in DAC and amp.
The H2 is a different kind of product: a dedicated digital audio player for people who own their music. It supports WAV up to 32-bit/384kHz, FLAC, APE and ALAC up to 24-bit/192kHz, DSF/DFF up to DSD128, SACD-ISO up to DSD64 and MP3, so it covers both audiophile formats and everyday files. Inside is an ESS ES9018K2M DAC paired with a MAX97220A headphone amplifier, and the 3.5 mm output delivers up to 70mW + 70mW into 32 ohms while supporting headphones from 16 to 150 ohms. That output range means it can drive both sensitive IEMs and moderately demanding over-ears without immediately running out of headroom.
Storage is the other headline. The H2 ships with a 128GB microSD card and accepts cards up to 512GB, so a large FLAC, WAV, DSD or MP3 collection can live on the device with no streaming and no phone involved. It also works as a USB DAC: connect it to a compatible computer over USB-C and it handles conversion for your desktop setup. The physical side is deliberately old-school — a 2.0-inch LCD, physical playback controls you can use without looking, a zinc-alloy body and a 1500mAh battery rated at up to 10 hours. Bluetooth 5.2 adds a wireless option, and there's a line out alongside the headphone jack. A one-year warranty is listed.
Buy the H2 if you want to decouple music from your phone, keep a lossless library offline, and get tactile buttons and a metal body for it. Skip it if you mainly stream, if you'd rather not manage files and cards, or if what you actually need is a better-sounding full-size headphone rather than another device to charge and carry.
• Best for upgrading the gear you already own → Sony MDR1ADAC/B. Its internal DAC and amp improve a phone, PC or portable player you already have.
• Best for a standalone offline library → HIFI WALKER H2. 128GB included, expandable to 512GB, with no streaming or phone required.
• Best for long battery sessions → HIFI WALKER H2. Up to 10 hours versus up to 7.5 hours on the Sony.
• Best for no-battery listening → Sony MDR1ADAC/B. Passive corded mode works with the battery off.
• Best for highest-resolution file support on paper → HIFI WALKER H2. WAV to 32-bit/384kHz and DSD128, plus SACD-ISO, versus the Sony's PCM 192kHz/24-bit and DSD 2.8/5.6MHz.
• Best for wireless convenience → HIFI WALKER H2. Bluetooth 5.2; the Sony is wired only.
• Best for all-day comfort and a sealed over-ear fit → Sony MDR1ADAC/B. Enfolding over-ear design with pressure-relieving cushions.
• Best for desktop USB-DAC duty → either, depending on your chain. The H2 is an external USB DAC for a computer; the Sony does its conversion inside the headphones from a USB source.
If I had to pick one, I'd choose the Sony MDR1ADAC/B — for a specific reason. It fixes the weakest link in most setups, which is the audio hardware already sitting in your phone or laptop, and it does it while doubling as a comfortable, passive-capable over-ear headphone. In my opinion that's the more versatile purchase for someone who already has music sources they like. I'd point you to the HIFI WALKER H2 instead if your real goal is to stop using your phone as a player and carry a self-contained hi-res library with more storage and battery. Either way, check the current price on Amazon before deciding, since that's the one variable that can tip a close call.
They're not really competitors. The Sony is a wired over-ear headphone with a built-in DAC and amp; the H2 is a dedicated portable player. "Better" depends on whether you need better sound from existing sources or a separate device for your own files.
It supports headphones from 16 to 150 ohms and puts out up to 70mW + 70mW at 32 ohms, so most IEMs and over-ears in that range will work. Very high-impedance or hard-to-drive headphones are outside its stated support.
Yes. It has a passive corded mode that works with a standard 3.5 mm jack and no battery, so you can still listen normally when the built-in amp isn't powered.
The Sony MDR1ADAC/B fits better here, because it improves whatever device you're already streaming from. The H2 is built around local files on a microSD card, so it's a weaker fit if streaming is your main habit.
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See also: AILZPXX USB C Headphones vs HIFI WALKER USB C, HIFI WALKER Bone Conduction Swimming vs DUSONLAP Open Ear Earbuds, HIFI WALKER Bone Conduction Headphones vs Opinta Swimming Headphones