FiiO Swaps ESS for Its Own Resistor Ladder in the R7 R2R, Drops THX — About $820 in China

FiiO has released a reworked version of its R7 desktop all-in-one, and the changes go right to the heart of the thing. The new R7 R2R drops the twin ESS DAC chips and the THX amplifier modules of the 2023 original in favour of FiiO's own resistor-ladder conversion and new amplification. It went on sale in China on 7 November at an official 5,499 yuan — roughly $820 at 7.14 yuan to the dollar — in black and white finishes, as reported by IT Home. English-language coverage followed on 11 November, when Darko.Audio picked up the launch.

What the R7 R2R is

The format is unchanged from the original: a portrait-screened desktop box running Android, which means installable streaming apps rather than a fixed manufacturer interface. FiiO lists six functions in its own announcement — digital audio player, DAC, headphone amplifier, digital transport, preamplifier and USB DAC — and IT Home's coverage adds turntable input and sound-card duty to the same list of roles. In other words it is still meant to be the only box on a desk, feeding headphones directly or acting as a source and preamp for something larger.

The screen grows to 5.5 inches at FHD resolution, up from the 4.97-inch 720x1280 panel on the original R7. The processor moves from a Snapdragon 660 with 4GB of RAM and 64GB of storage to a Snapdragon 680 with 8GB and 128GB. Those original-R7 figures come from eCoustics, which also records the first model's US price of $699.99 (£649.99, about $860 at today's reference rate). FiiO has announced no US, UK or European price or date for the R2R version; its announcement lists AliExpress as a sales channel.

The DAC: 192 resistors instead of two chips

The headline change is the conversion stage. Where the original R7 used two ESS ES9068AS DAC chips, the R7 R2R uses what FiiO describes as a self-developed 24-bit R2R resistor ladder array built from 192 precision thin-film resistors, supported by two FPGAs and two custom femtosecond oscillators. IT Home and FiiO's own page agree on all of those numbers.

A resistor ladder is a fundamentally different way of getting from digits to analogue than a modern delta-sigma chip: rather than buying in a highly integrated converter, the manufacturer builds the conversion network itself from discrete matched resistors and controls the digital front end in programmable logic. That is a design philosophy choice rather than a guaranteed sonic upgrade, and nobody has published measurements of the R7 R2R. FiiO's marketing language about the sound is FiiO's; we have not heard the unit.

The 192-resistor count is the same figure FiiO quotes for its K11 R2R and K13 R2R desktop DAC/amps, which suggests the company is carrying a house ladder design up the range rather than building something unique for each model. That is as far as the sourced comparison goes — FiiO has not detailed how the implementations differ.

THX is gone

The original R7's headphone stage used two THX AAA-788+ modules. The R2R version does not use THX amplification at all. No source explains the reasoning, and FiiO has not framed the change publicly beyond describing the new amplification as its own.

On output, FiiO quotes up to 4,000mW + 4,000mW from the balanced headphone output, with five gain levels. It is worth being precise about what that does and does not tell you: FiiO gives no load for the 4,000mW figure, so it cannot be compared cleanly with the original R7's quoted 3.6W into 32 ohms. The number is bigger; the measurement conditions behind it are not published.

The rest of the feature list

• Nine operating modes, covering the player, DAC, transport, preamp and USB-DAC roles
• AUTO EQ
• Five gain levels on the headphone output
• Both DC and AC power input
• Remote control, plus control from the FiiO Control app

Everything above comes from IT Home's launch report and FiiO's own announcement. Beyond the balanced headphone output, FiiO has not published a full input and output list for the R2R model in the material covered here, nor an Android version, wireless specification or streaming-platform certifications. Those are all things the original R7 had in some form, but assuming they carry over unchanged would be guesswork.

Where this sits

Taken together, the R7 R2R reads less like a refresh and more like a different argument wearing the same chassis. The original was an Android desktop hub built around two mainstream high-performance DAC chips and licensed THX amplification — a specification sheet assembled from known, measurable, widely used parts. The replacement puts FiiO's own converter topology at the centre and takes the licensed amplifier branding off the front. The computing side, meanwhile, has simply been modernised: a faster chipset, double the memory and storage, a larger and sharper screen.

For now this is a China-market release at about $820, with the original R7 having launched at $699.99 in the US back in 2023. Whether FiiO brings the R2R version to Western markets, and at what price, has not been announced.

Dollar figures are converted at the European Central Bank reference rate of 11 November 2026 and are approximate.