Turn your desk into a reference listening station—wired precision, wireless freedom

Rediscover your library with the FiiO K7 BT, a truly balanced desktop DAC/amp that marries velvety AKM conversion with THX AAA muscle. It delivers the black backgrounds, effortless dynamics, and low-level detail audiophiles crave—plus the convenience of high‑resolution Bluetooth when you want to kick back cable‑free. Whether you’re driving planars at your desk or feeding powered speakers, the K7 BT is voiced for long‑session musicality without listening fatigue.

Why Audiophiles Choose This Product

• Bold, balanced sound with headroom to spare:
  Dual AK4493SEQ DACs feed dual THX AAA 788+ amplifier modules for clean, neutral drive with a hint of AKM “velvet” smoothness. Expect authority down low, a natural midrange, and grain‑free treble across a wide soundstage. Power is rated up to 2,000 mW into 32 Ω balanced and 560 mW into 300 Ω, so both low- and high‑impedance headphones sing.
• Engineering that measures and sounds right:
  A fully balanced, six‑stage audio circuit, XMOS XUF208 USB engine, and comprehensive protection (overheat/overload/DC) ensure low distortion and long‑term reliability. FiiO’s ADC curve reconstruction yields 112 precise, channel‑matched volume steps with silent background.
• Everyday usability, elevated:
  Front‑panel input and output mode switches, two hardware gain levels, a tactile volume wheel, and a status RGB ring make operation intuitive. Three output modes let you choose headphone out, variable pre‑out, or fixed line out at the touch of a button.
• Versatile connectivity for any desk:
  USB, optical, coaxial, and RCA line‑in cover digital and analog sources; 6.35 mm single‑ended and 4.4 mm balanced headphone outs plus rear RCA line‑out handle listening or speaker duty.
• Wireless done right:
  The BT edition adds a Qualcomm QCC5124 receiver (Bluetooth 5.1) supporting LDAC, aptX Adaptive, aptX HD, aptX LL, aptX, AAC, and SBC. Control codec selection, apply PEQ, and update firmware via the FiiO Control app for a tailored wireless experience. Note: App controls apply in Bluetooth mode only.

What’s Included

• Main unit: FiiO K7 BT balanced desktop DAC & headphone amplifier (dual AK4493SEQ DACs, dual THX AAA 788+ amps)
• Power adapter and AC cable: Low‑noise external 12 V / 24 W supply for stable performance
• USB cable: For computer connection (USB audio)
• Bluetooth antenna: For stable long‑range reception (K7 BT only)
• Documentation: Quick start guide and warranty card

Package items are per FiiO’s official listing; antenna inclusion for the BT model is confirmed in hands‑on coverage.

Technical Specifications

Professional Recognition

• Certifications: Displays Hi‑Res Audio and Hi‑Res Audio Wireless badges (Japan Audio Society), reflecting its ability to reproduce the full hi‑res spectrum via wired and LDAC wireless playback.
• Expert reviews:
  • “Easy to use, offers remarkable audio detail … and never introduced any ear fatigue during long playback sessions.” — TechHive.
  • “Fully balanced internal architecture … good Bluetooth performance.” — Headfonics on K7 BT.
• Heritage and engineering:
  • Shares the acclaimed THX AAA 788+ amplifier platform found in FiiO’s higher‑tier designs, democratizing reference‑grade drive at a compact desktop size.
• Thoughtful UX touches:
  • The RGB ring provides instant format/codec confirmation; input/output toggles and dual‑gain support fast, frustration‑free daily use.

The Bottom Line

The FiiO K7 BT hits a rare sweet spot: balanced desktop power, refined AKM tonality, and low‑distortion THX drive—plus modern, app‑tunable Bluetooth for when convenience calls. With serious I/O, three output modes, and enough clean headroom for today’s planars, it’s an easy recommendation for anyone building a high‑value, high‑fidelity desk setup that won’t box them into one way of listening. If you want one device that looks elegant, measures right, and simply lets your music flow, the K7 BT is built for the long haul.

• HEXA-Structure DAC Design
• Four AK4499EX and Two AK4191EQ DACs
• 32-Bit / 768 kHz and DSD512 (22.4 MHz)
• Qualcomm Snapdragon 6125 Octa-Core CPU
• 256GB Internal Memory
• Dual-Band Wi-Fi
• High-Definition 5.46" Touchscreen
• Balanced and Unbalanced/Optical Outputs
• Charging and Data Transfers via USB-C
• Includes Leather Case and USB-C Cable

Luxury Meets Innovation, SP3000

Astell &Kern has set the standard for perfect sound using the latest
innovative technology with the A &ultima series. The A &ultima SP3000
is the newest flagship product that is the essence of everything learned and
engineered over the last 10+ years of digital music processing.

A &ultima SP3000 is the world’s first DAP with independent Dual Audio
Circuitry and the latest DAC with HEXA-Audio Circuitry structure, as well as
uses all audio technologies and the best materials that lets you feel the
overwhelming impact of sound and music.

Experience perfection firsthand with the true next-generation flagship, A
&ultima SP3000, the pinnacle of audio players.

Materials Innovations: World’s First Use of Stainless Steel 904L for DAP

Body Material

To achieve the goal of the A &ultima series, which is ‘to provide the best
value that no one can imitate while using the most innovative and
uncompromising design and craftsmanship’, the SP3000 uses 904L stainless
steel material that has never been attempted before in a portable audio
player. Using this material has expanded its value from just a digital device
to the realm of a luxury good.

904L stainless steel is harder and more difficult to process than general
stainless steel requiring significantly more time and effort. However, due to
its excellent durability and corrosion resistance, it has a characteristic
that does not lose its beauty and is why it is used in expensive luxury
watches where perfection in all materials and parts must be pursued with an
irreplaceable and wonderful luster.

Experience the uncompromising beauty and luxury of the SP3000 produced by
Astell &Kern’s experienced craftsmanship.

TERATON ALPHA – The Essence of A&K Audio Technologies Merged Into the

SP3000

In order to develop the ultimate audio player that has never been experienced
before, not only do we use the latest DAC and technology available, but we use
the innovative audio technology of TERATON ALPHA, AK’s Ultimate Sound
Solution, which has been refined for the SP3000.

TERATON ALPHA, engineered through endless research, is Astell &Kern’s
unique technology that has been designed to produce audio playback that is
close to the original sound through effective power noise removal, efficient
power management and unwavering amplification, and a fully converted audio
output interface.

The HEXA-Audio Circuitry structure and independent dual audio circuit,
implemented for the first time in the SP3000 , are paired together with
TERATON ALPHA’s sound solution to create the purest original sound.

In the Box

• Astell & Kern A&ultima SP3000 High-Resolution Music Player (Silver)
• USB-C Cable
• microSD Card Slot Cover

• HEXA-Structure DAC Design
• Four AK4499EX and Two AK4191EQ DACs
• 32-Bit / 768 kHz and DSD512 (22.4 MHz)
• Qualcomm Snapdragon 6125 Octa-Core CPU
• 256GB Internal Memory
• Dual-Band Wi-Fi
• High-Definition 5.46" Touchscreen
• Balanced and Unbalanced/Optical Outputs
• Charging and Data Transfers via USB-C
• Includes Leather Case and USB-C Cable

Luxury Meets Innovation, SP3000

Astell &Kern has set the standard for perfect sound using the latest
innovative technology with the A &ultima series. The A &ultima SP3000
is the newest flagship product that is the essence of everything learned and
engineered over the last 10+ years of digital music processing.

A &ultima SP3000 is the world’s first DAP with independent Dual Audio
Circuitry and the latest DAC with HEXA-Audio Circuitry structure, as well as
uses all audio technologies and the best materials that lets you feel the
overwhelming impact of sound and music.

Experience perfection firsthand with the true next-generation flagship, A
&ultima SP3000, the pinnacle of audio players.

Materials Innovations: World’s First Use of Stainless Steel 904L for DAP

Body Material

To achieve the goal of the A &ultima series, which is ‘to provide the best
value that no one can imitate while using the most innovative and
uncompromising design and craftsmanship’, the SP3000 uses 904L stainless
steel material that has never been attempted before in a portable audio
player. Using this material has expanded its value from just a digital device
to the realm of a luxury good.

904L stainless s

Elevate your desk to concert level

Rediscover albums you thought you knew. The FiiO K7 brings balanced desktop power, vanishingly low distortion, and a subtly musical AKM presentation together in a compact, all‑aluminum body—so your favorite headphones finally sound as open, dynamic, and effortless as they should. Whether you’re driving power‑hungry planars or sensitive IEMs, K7 delivers clean headroom with the composure of a true hi‑fi component, not a dongle or laptop jack.

Why Audiophiles Choose This Product

• Genuinely engaging, high‑fidelity sound: Dual AKM AK4493SEQ DACs are known for a natural, slightly warm timbre that keeps detail intact without introducing glare—ideal for long sessions and mixed genres. Reviewers consistently describe the K7 as clean, dynamic, and fatigue‑free.
• Serious engineering where it counts: The fully balanced six‑stage signal path and dual THX AAA 788+ amplifier modules deliver ultra‑low distortion with abundant current, translating to grip and control on difficult loads. Independent LDO‑regulated power stages and multiple protection circuits keep performance stable.
• Desk‑friendly and intuitive: A solid aluminum chassis, tactile switches, and an ADC‑assisted volume system with 112 smooth steps prevent channel imbalance at low levels, so you can fine‑tune loudness precisely day or night.
• Versatile connectivity for any setup: USB‑B, optical, coaxial, and RCA line‑in cover computers, consoles, streamers, and DACs; 6.35 mm single‑ended and 4.4 mm balanced front‑panel outputs serve everything from IEMs to reference headphones. Three output modes let K7 act as headphone amp, preamp for powered speakers, or fixed DAC.
• Power with poise that outperforms its class: Up to 2000 mW per channel (32 Ω, balanced) or 560 mW (300 Ω, balanced) means confident drive for planars and high‑impedance dynamics; measurements from independent labs show excellent noise and distortion performance.

What’s Included

• FiiO K7 desktop DAC/amp: Dual AK4493SEQ DACs, dual THX AAA 788+ amps, truly balanced architecture.
• Primary accessories: 12 V / 2 A external power adapter and regional power cable; USB‑A to USB‑B data cable.
• Documentation: Quick start guide and warranty card.

Technical Specifications

Professional Recognition

• “Clean, engaging sound signature with no distortion… plenty of power to drive the vast majority of headphones.” — TechPowerUp.
• Independent measurements from L7Audiolab show excellent SINAD and multitone results from both single‑ended and balanced outputs, supporting its low‑distortion design.
• Head‑Fi community reviewers highlight its combination of power, low noise, and robust construction, calling it a “little beast” and praising its clear, natural sound.
• FiiO heritage: The K7 inherits architecture cues from the brand’s higher‑end K9 series—balanced topology, THX AAA amplification, and careful power management—distilled into a more compact, accessible chassis.

The Bottom Line

FiiO’s K7 is the rare “do‑it‑once” desktop upgrade: a truly balanced, low‑distortion DAC/headphone amp with the power, connections, and refinement to anchor your system for years. If you want a reliable, measurements‑backed step into serious desktop audio—without giving up musicality or desk space—the K7 sets a new baseline that’s hard to beat.

Notes and buying tips:

• This listing is for the wired K7 model. A separate K7 BT version adds Bluetooth codecs and app control if you need wireless input.
• For the best experience on Windows, install FiiO’s USB driver and use exclusive/ASIO mode in your player to auto‑match sample rates.

Hear your N6iii go reference: greater drive, lower noise, zero compromise

The Cayin E203 unlocks a new tier of clarity, headroom, and control from your N6iii. Built around ESS’s flagship ES9039S PRO and Cayin’s DAO hybrid amp architecture, this second‑generation, tool‑free motherboard elevates both resolution and musicality while keeping output impedance ultra‑low for modern IEMs. If you’ve ever felt you had to choose between black‑background finesse for sensitive earphones and real current for full‑size dynamics, the E203 is the elegant answer.

Why Audiophiles Choose This Product

• Primary Benefit: fast, neutral, and resolving sound with superb staging
  The ES9039S PRO implementation presents a clean, dynamic canvas with tighter bass definition, airier separation, and a larger image versus the stock C201—ideal when you want “studio‑grade” neutrality without harshness. Reviewers consistently note improved layering and refinement.

• Technical Benefit: flagship ESS with fully balanced analog stages
  An eight‑channel independent current output feeds a custom 8‑channel I/V conversion, followed by fully symmetric LPF and buffer stages—an engineering choice that maximizes the 9039S PRO’s linearity and dynamic range.

• Practical Benefit: three amp modes, one card
  Cayin’s Dual Amplifier Operation (DAO) hybrid stage lets you pick Class A, Class AB, or Hyper Mode. Hyper raises bias/current for maximum grip on challenging loads; Class A/AB let you tune warmth vs. battery life on the fly.

• Compatibility Benefit: purpose‑built for N6iii, with tool‑free swapping
  The E203 is a Gen2 audio motherboard designed exclusively for N6iii’s enlarged, shielded bay and quick‑release latch. N6ii cards are not compatible. Cayin’s v1.21 firmware adds dedicated E203 UI/functions.

• Unique Benefit: headphone‑out only, by design
  By omitting line‑out on this card, Cayin concentrates space and power on the headphone path, reducing potential crosstalk and keeping output impedance exceptionally low for IEM synergy.

What’s Included

• Main Product: Cayin E203 Audio Motherboard (for N6iii), ES9039S PRO DAC, DAO hybrid amp with Class A/AB/Hyper
• Primary Accessory: Quick‑start/warranty documentation (contents may vary by region)
• Secondary Items: —
• Documentation: Manufacturer warranty and user guidance provided by Cayin/dealer at purchase

Note: The E203 is an add‑on module for the Cayin N6iii DAP and requires the player to function. No tools are needed for installation.

Technical Specifications

Professional Recognition

• Reviews

  • Headfonia: calls the E203 “more neutral… technically superior,” praising its bigger stage and refined treble versus the C201.
  • Headfonics: highlights E203 as the “card of choice” for IEM users, noting DAO modes and up to 900 mW balanced in Hyper Mode.
  • Twister6: reports strong endurance for a high‑power card and applauds the N6iii/E203 modular concept and included essentials.

• Community Feedback

  • Head‑Fi users describe E203 as “less warm… more neutral,” with audible differences across A/AB/Hyper and excellent synergy with varied IEMs; one calls it “the nicest Sabre implementation I’ve heard.”

• Official Support & Heritage

  • Cayin issued N6iii firmware v1.21 with E203 UI/function support (Dec 26, 2024), underscoring long‑term backing.
  • Cayin, founded in 1993, has earned a reputation for innovative portable and desktop designs, including tube amplification and modular DAPs.

• Design Rationale

  • E203’s headphone‑focused architecture intentionally omits line‑out to reduce interference and crosstalk, concentrating resources on the PO path.

The Bottom Line

If you own a Cayin N6iii and want a more reference‑leaning, high‑current output with an inky background for today’s sensitive IEMs—and enough muscle for many full‑size headphones—the E203 is the drop‑in upgrade that delivers. Its flagship ESS core, fully balanced analog path, and three selectable amp modes combine into a confident, future‑proof tuning tool that complements the N6iii’s modular promise without adding complexity. Install it in seconds, pick your operating class, and hear your library anew.

Notes on validation and accuracy

• E203 hardware, power, impedance, frequency response, distortion, DR/SNR, weight, and battery figures were cross‑checked across multiple authorized dealers and press materials.
• N6iii platform compatibility and firmware support are confirmed via Cayin’s official site.
• Sound character observations reflect consensus across professional reviews and community impressions. Individual pairing may vary.

Recommended for: N6iii owners seeking maximum transparency, selectable warmth/drive, and low‑impedance control—without sacrificing the convenience of a modern Android DAP.

with R‑2R and 1‑Bit DAC

Hear both sides of perfection: warm R‑2R soul and ultra‑clean 1‑Bit precision—instantly, on your N6iii.

If you’ve ever wished you could switch between the analog‑rich flow of an R‑2R ladder and the airy, laser‑etched imaging of a 1‑Bit DSD DAC without swapping gear, the R202 was built for you. Cayin’s modular “audio motherboard” for the N6iii delivers two fully discrete, fully balanced DAC engines on a single board, letting you choose the sonic character that best fits the music, the moment, and your monitors. No compromises, no cables—just tap to select R‑2R, 1‑Bit, or Auto and immerse. Compatible exclusively with the Cayin N6iii (firmware v1.6 or later).

Why Audiophiles Choose This Product

• • Sound, two ways: R‑2R mode wraps you in a saturated, emotive presentation with expansive body; 1‑Bit mode expands space and pin‑point imaging with a cleaner, more linear feel. Switch on the fly or let Auto pick by file format.
• • Discrete engineering that matters: Dual, fully discrete, fully balanced DACs—192 ultra‑precision resistors for the 24‑bit R‑2R ladder and 128 for the 1‑Bit DSD path—feed a quad‑channel, fully balanced headphone amp. Expect low noise, high dynamic contrast, and true left/right symmetry.
• • Practical portability: Purpose‑built for IEMs and easy‑to‑drive headphones with sub‑ohm output impedance and robust power: up to 550 mW balanced, 250 mW single‑ended (32 Ω). No hiss, no fuss.
• • Seamless integration: Quick‑release Gen2 latches make swapping motherboards simple. The N6iii recognizes the R202 after updating to firmware v1.6—then presents the R‑2R/1‑Bit/Auto options in the UI.
• • Built for black backgrounds: Matrix‑structured power, precision analog volume (NJW1195), and premium TI op‑amps (OPA1612/OPA1662/INA1620) maintain purity and drive.
• • All‑day listening: Excellent endurance with the N6iii—up to 16 hours (R‑2R), 14 hours (1‑Bit), and 15 hours (Auto) under benchmark conditions.

What’s Included

• • Main product: Cayin R202 Audio Motherboard for N6iii (dual‑DAC discrete R‑2R + 1‑Bit architecture)
• • Primary accessory: Protective anti‑static packaging (factory presentation)
• • Secondary items: User documentation/quick start guide (region/retailer packaging may vary)
• • Documentation: Warranty information via Cayin/authorized dealer

Note: N6iii player sold separately.

Technical Specifications

Professional Recognition

• Reviews: Headfonics rated R202 highly (9.2/10), praising its “two DACs in one” approach and the excellent staging of 1‑Bit mode with the rich, emotive R‑2R option. They also note PO‑only design and sub‑ohm outputs suited to IEMs.
• Reviews: Twister6 highlights the Gen2 quick‑release latches, black background, and standout battery life with the N6iii, confirming dual‑discrete construction and PO‑only I/O.
• Heritage: R202 follows Cayin’s long‑running modular lineage (from N6ii’s R01 R‑2R card to the N7’s discrete 1‑Bit design), now unified on one board for the N6iii. Official firmware v1.6 adds R202 UI support.
• Community buzz: Early owner discussions compare R202’s lush R‑2R timbre with the cleaner, wider 1‑Bit presentation—most calling it the most musically engaging N6iii board yet for IEMs.

The Bottom Line

The Cayin R202 is the plug‑in answer to a long‑standing audiophile dilemma: Do you want the organic dimensionality of R‑2R or the crystalline imaging of 1‑Bit? With R202 you get both, engineered discretely and balanced front‑to‑back, driven by a quiet, muscular amplifier stage that flatters sensitive IEMs and portable headphones. If you own an N6iii and value choice without clutter, R202 is the definitive sound‑shaping upgrade—purposeful, silent, and endlessly musical. Update your player to firmware v1.6, snap the board in, and rediscover your library two different ways.

Product Type and Fit Guide (for DAC/amp modules)

• Input/Output: PO via 3.5 mm SE and 4.4 mm BAL; no dedicated line‑out or SPDIF on this board. For fixed line‑level or external amps, consider other N6iii motherboards.
• Power/Impedance: Best with IEMs and moderately sensitive headphones; not intended for very demanding, high‑power full‑size planars.
• Features at a glance: Dual discrete DACs (R‑2R and 1‑Bit), analog balanced volume, quick‑release latches, sub‑ohm outputs, long battery life with N6iii.

Notes on compatibility: Works only with Cayin N6iii. Ensure N6iii firmware is updated to v1.6 or newer to access R‑2R/1‑Bit/Auto modes in the Audio Settings.

Hear more of your music, for longer – effortless clarity with black‑silence backgrounds

Unlock the full potential of your Cayin N6iii with C201, a swappable audio motherboard engineered for vanishing‑low noise, superb channel separation and long, cool‑running sessions. Built around eight Cirrus Logic CS43198 DACs working in a parallel full‑differential matrix and a high‑precision analog stage, C201 delivers a neutral‑natural presentation with airy treble, lifelike mids, and punchy, controlled bass—without the fatigue or heat that can cut listening short.

Why Audiophiles Choose This Product

• The sound you’ve been chasing

  • Balanced, transparent tuning with excellent layering and a black background that flatters both sensitive IEMs and full‑size headphones. Reviewers describe it as a “balanced, natural to neutral sounding motherboard.”

• Engineered for low noise and precision

  • Parallel full‑differential matrix DAC: 8× CS43198 in mono, four per channel, synchronized via the N6iii’s FPGA for lower distortion and higher density. Four NJU72315 chips implement a cascade passive volume control for ultra‑fine, channel‑consistent steps. Headphone drive comes from four TI OPA1622 op‑amps in high‑current parallel configuration.

• Practical, everyday usability

  • Cool operation and excellent battery performance on the N6iii platform (up to 14.2 hours SE, 12.4 hours balanced), plus precise low‑volume balance for sensitive IEMs.

• Seamless device compatibility

  • Purpose‑built for the Cayin N6iii’s second‑generation modular bay with a quick‑release, tool‑free locking mechanism. Note: Gen‑2 motherboards (like C201) are not backward‑compatible with N6ii.

• Thoughtful connectivity

  • Dedicated 3.5 mm line‑out, separate 3.5 mm headphone out, and a shared 4.4 mm balanced PO/LO—so you can run IEMs, headphones, or feed an external amp with fixed line level.

What’s Included

• C201 Audio Motherboard
  • Second‑generation swappable DAC/amp module for Cayin N6iii with 8× CS43198 DACs.
• Documentation
  • Quick start/warranty information (contents may vary by region).

Technical Specifications

Professional Recognition

• Reviews

  • Headfonics: calls C201 a “balanced, natural to neutral sounding motherboard,” praising its wide imaging and low noise floor with sensitive IEMs.
  • Headfonia: highlights N6iii’s “dynamic, detailed sound,” strong usability and modular design; offers specific sound notes for C201 vs E203.
  • Twister6: details C201’s engineering—8× CS43198 matrix, 4× NJU72315 cascade volume, 4× OPA1622 high‑current parallel—and documents real‑world power/output behavior.

• Community feedback

  • Head‑Fi user impressions consistently note the C201’s deep soundstage, black background, and strong everyday pairing flexibility.

• Heritage

  • Built by Cayin (Zhuhai Spark Electronic Equipment Co., Ltd.), the N6iii platform and its audio motherboards are part of the brand’s ongoing modular DAP roadmap, shown across official communications and firmware support.

• Innovation

  • Second‑generation, quick‑release audio motherboard system with larger PCB real estate and automatic module detection on the N6iii platform.

The Bottom Line

C201 is the “do‑everything‑well” motherboard for N6iii owners who want reference‑grade neutrality, superb separation, and all‑day stamina. Its parallel CS43198 matrix and precision analog stage deliver a clean, musical, and fatigue‑free listen, while the dedicated 3.5 mm line‑out and shared 4.4 mm PO/LO make it easy to integrate into portable or desktop chains. If you value long sessions, black backgrounds, and honest tonality—without sacrificing flexibility—C201 is the smart, future‑forward upgrade for your N6iii.

Notes on compatibility: C201 is designed exclusively for the Cayin N6iii Gen‑2 modular bay and will not fit the earlier N6ii. Always update N6iii firmware to the latest version for best performance and module recognition.

Imagine a portable player that adapts to your music instead of forcing your music to adapt to it. With the N6iii fitted with Cayin’s R202 Audio Motherboard, you get the warmth and dimensionality of a discrete R‑2R ladder for PCM and the purity of a discrete 1‑Bit DAC for DSD—instantly selectable, or automatically chosen per track. It’s the soul of a high‑end desktop rig, made pocketable and effortless.

Why Audiophiles Choose This Product

• • Sound, tailored by format: Dual fully discrete DAC architectures—24‑bit balanced R‑2R for PCM and 1‑Bit balanced DAC for DSD—deliver format‑true timbre and staging. Auto Mode selects the optimal DAC per file so you hear PCM and DSD as they were meant to be heard.
• • Engineering depth that matters: The R202 is built around 320 ultra‑precision 0.1% thin‑film resistors (192 for the R‑2R lattice; 128 for the 1‑Bit DAC), a quad‑channel fully balanced amplifier using TI OPA1612/OPA1662/INA1620, and a 256‑step NJW1195 analog volume control for micro‑exact level matching.
• • Everyday practicality: Phone‑out only (no line‑out) keeps the signal path short and focused for headphones and IEMs. Output impedance stays ultra‑low (≈0.8Ω BAL / 0.5Ω SE) to preserve your IEM’s tuning.
• • Platform power and streaming freedom: Android 12 with Snapdragon 665, 6GB RAM, 128GB storage (plus microSD up to 2TB), Wi‑Fi 2.4/5GHz, and Bluetooth 5.0 with LDAC/UAT make the N6iii fast, app‑friendly, and ready for lossless streaming. Cayin’s DTA bypass preserves bit‑perfect playback across apps.
• • Unique among DAPs: Second‑generation, tool‑free modular audio bay lets you change the N6iii’s sonic personality in seconds; firmware v1.6 adds native UI and feature support for the R202.

What’s Included

• • Main product: Cayin N6iii Digital Audio Player with R202 Audio Motherboard pre‑installed (quick‑release, tool‑free module system).
• • Primary accessory: USB‑C to USB‑C cable (charging/data/USB audio).
• • Secondary items: PU leather case; screen protectors.
• • Documentation: Printed user manual and warranty; R202 module documentation/antistatic packaging.

Note: Contents can vary slightly by region; check your retailer’s listing for the exact bundle.

Technical Specifications

Specifications compiled from Cayin’s official materials and specialist retailers/reviewers. Reviewer testing has reported up to ~16.5 hours continuous loop playback with R202 under specific conditions; your runtime will vary with gain, file type, and output.

Professional Recognition

• • Reviews:
  • “Phone‑out only, purpose‑built for pure output” and a dual‑DAC design that supports up to PCM 768 kHz / DSD512 processing—with notably strong battery life measured in testing.
  • Multiple reviewers praise the in‑box leather case, quality USB‑C cable, and overall ergonomics—rare at this level.
  • Headfonia highlights Cayin’s maturing Gen2 modular ecosystem around N6iii, from the stock C201 to higher‑performance boards—R202 adds the discrete DAC option enthusiasts asked for.
• • Heritage: Cayin is the personal‑audio brand of Zhuhai Spark Electronic Equipment Co., Ltd., designing hi‑fi components since 1993 with deep R&D across desktop and portable categories.
• • Ongoing innovation: Official firmware v1.6 introduced native R202 UI and feature support on N6iii, underscoring Cayin’s active post‑launch development.

The Bottom Line

N6iii with the R202 motherboard is for listeners who won’t compromise between the organic, “analog‑like” flow of R‑2R PCM and the crystalline directness of true 1‑Bit DSD. It marries serious circuitry—discrete dual DACs, differential amplification, precision analog volume—with a modern Android platform and a modular bay that lets you evolve your player over time. If you want a portable that feels custom‑tuned to each format and each pairing, this is the elegant, future‑proof way to get there.

Bring real tube magic to your pocket — with the control, clarity, and convenience modern audiophiles demand.

The Cayin N3Ultra is for listeners who crave that unmistakable tube bloom without giving up speed, separation, or everyday portability. Two genuine NOS Raytheon JAN6418 miniature pentodes shape your music into three distinct timbres — Classic, Modern, and Solid-State — across every analog output. It’s a pure, offline DAP purpose-built to eliminate wireless noise, focus on sound, and make your IEMs or headphones sing anywhere.

Why Audiophiles Choose This Product

• • Primary Benefit: Three premium sound personalities at your fingertips
  Choose warm, saturated Classic, energetic and incisive Modern, or clean Solid-State — all available on both 3.5 mm and 4.4 mm outputs and even on the true line outs. It’s like carrying three impeccably voiced sources in one.

• • Technical Benefit: Third‑generation tube circuit, dual AKM DACs
  Cayin’s Gen3 JAN6418 implementation uses a two‑stage timbre circuit with FET buffering and local NFB tuning, minimizing microphonics while preserving tube dimensionality. Twin AKM AK4493S DACs run in mono for fully differential output and excellent channel separation.

• • Practical Benefit: Portable, responsive, and built to last
  A 4.1" 720×1280 touchscreen, tactile controls, and a 204 g aluminum chassis make one‑hand use effortless. The 4500 mAh battery supports up to 11.8 hours (SE/solid‑state) or 7.6 hours (BAL/tube), with QC3.0 fast charging.

• • Compatibility Benefit: Plays with (almost) everything you own
  Decodes PCM up to 32‑bit/768 kHz and native DSD512, works as a USB DAC for Windows/macOS/Android/iOS, supports USB‑C S/PDIF coax, and takes microSD cards up to 1 TB (plus OTG).

• • Unique Benefit: A “pure DAP” by design — quieter tubes, purer signal
  N3Ultra omits Wi‑Fi/Bluetooth to avoid RF interference that can provoke tube microphonics in traditional miniature valves. The result: a blacker background and more consistent tube performance on the go.

What’s Included

• • Main Product: Cayin N3Ultra NOS Tube Digital Audio Player
  Dual AKM AK4493S (mono mode), dual JAN6418 NOS tubes, triple‑timbre across all analog outputs.
• • Primary Accessory: USB‑A to USB‑C cable (charging/data/USB DAC)
• • Secondary Items:
  • Silicone protective case
  • Tempered glass/screen protectors
• • Documentation: User manual, warranty materials, Hi‑Res stickers.

Technical Specifications

Professional Recognition

• Awards
  • Ear‑Fidelity: Best DAP of 2024 — praised for “pocketable, powerful, and beautifully‑sounding” performance with standout Modern Tube mode.

• Reviews
  • Headfonics: “A huge step up from the older N3Pro… improved technical capability… and re‑tuned timbre modes.”
  • Twister6: “Like a Pro on Steroids” — highlights the triple timbre, responsive UI, and near‑silent tube implementation.
  • Head‑Fi community: Cayin confirms the omission of Wi‑Fi/Bluetooth to avoid RF‑induced tube noise; users report low microphonics and strong sound quality.

• Heritage and Innovation
  • Draws on Cayin’s third‑generation portable tube design: a two‑stage JAN6418 circuit with mechanical shock absorption and suspension to tame microphonics while preserving that vivid, spacious tube presentation — now available from SE and balanced outputs alike.

The Bottom Line

If you want a transportable source that prioritizes sound over everything else, the N3Ultra delivers in a way silicon alone can’t. It marries the musicality of real NOS tubes with modern control, fully differential DAC performance, and a quiet, RF‑free platform that lets your IEMs and headphones show their true colors. Slip it in your pocket, pick your timbre, and lose yourself in the music — anywhere, anytime.

A clean, powerful upgrade for every desktop — effortless detail, zero fuss

Turn any desk into a true hi‑fi listening station. The FiiO K11 delivers the clarity and drive audiophiles crave without the clutter: a slim, metal desktop DAC/amp with serious power, a neutral, revealing presentation, and intuitive one‑knob control. From sensitive IEMs to full‑size headphones, the K11 unlocks more texture, space, and micro‑detail from your music, games, and films — all while staying whisper‑quiet and simple to use.

Why Audiophiles Choose This Product

• Primary Benefit: Neutral, transparent sound with black backgrounds
  The K11’s tuning leans clean and uncolored, letting your headphones speak for themselves with strong imaging and above‑average detail retrieval for its class. Community reviewers repeatedly note its “clean” and “balanced” character that doesn’t add glare or artificial edge.

• Technical Benefit: Proven DAC architecture and robust amplification
  A Cirrus Logic CS43198 DAC feeds dedicated amplification (3 gain levels), delivering up to 1.4 W per channel from the balanced 4.4 mm output and 520 mW per channel from the 6.35 mm jack — plenty for most planars and dynamics.

• Practical Benefit: Desktop‑friendly design with one‑knob control
  Slim aluminum chassis, custom high‑contrast LCD for at‑a‑glance status, adjustable RGB logo lighting, and a multi‑function volume/menu knob keep operation fast and intuitive.

• Compatibility Benefit: Plug‑and‑play across sources
  Use USB‑C (driver‑free on Windows 10+), optical, or coaxial inputs. Outputs include 6.35 mm, 4.4 mm balanced, RCA line‑out, and even a coaxial digital out for feeding external gear (USB mode only). PS5 and Switch are supported in USB DAC mode.

• Unique Benefit: Three volume curves matched to your headphones
  Each gain level has its own volume curve, allowing precise control from ultra‑sensitive IEMs to higher‑impedance over‑ears — a thoughtful touch typically found higher up the range.

What’s Included

• FiiO K11 DAC/Amp: Model K11 in Obsidian Black, Midnight Silver, or Titanium; CS43198 DAC; up to 1.4 W x2 (balanced) at 32 Ω.
• Power Adapter: External 12 V / 2 A with AC cable.
• USB Cable: USB‑A to USB‑C data cable for computers and consoles.
• Adapter: 6.35 mm (1/4") headphone adapter.
• Documentation: Quick start guide and warranty card.

Technical Specifications

Professional Recognition

• Reviews

  • Head‑Fi users describe the K11 as “very clean” and neutral with good staging and micro‑detail; they also highlight the low hiss with sensitive IEMs and advise using the SE jack for low‑impedance multi‑driver models because the balanced output impedance is slightly higher.
  • Mobileaudiophile praises the K11’s “clean, detailed sound with excellent tonal balance,” compact build, and balanced/SE versatility — a strong performer that retains source character without unwanted coloration.

• Heritage

  • Part of FiiO’s proven K‑series desktop line (K5 Pro, K7, K9/K9 Pro), the K11 distills the family’s connectivity and power into a slimmer, more affordable form factor designed for modern desks and consoles.

• Innovation

  • Thoughtful UI touches — custom LCD, RGB sampling‑rate indicator, and three gain‑specific volume curves — make day‑to‑day use seamless while protecting ears and gear.

Setup Notes and Compatibility Tips

• Optical input supports up to 96 kHz/24‑bit; coaxial up to 192 kHz/24‑bit. If you need 192 kHz over S/PDIF, use coax.
• Coaxial “Out” functions only when the K11 is used as a USB DAC — perfect for feeding powered speakers or an external DAC from your computer.
• For very sensitive, low‑impedance IEMs, start with Low gain and the 6.35 mm output to minimize potential FR interaction; the balanced 4.4 mm output is ideal for full‑size headphones that benefit from more power.

The Bottom Line

If you want a compact, impeccably easy desktop DAC/amp that simply gets out of the way of your music — yet has the muscle to light up demanding headphones — the FiiO K11 is a standout. Its clean, neutral voice, generous I/O (including USB‑to‑coax digital out), and user‑friendly interface make it an upgrade you’ll appreciate every day across music, movies, and games. Backed by the maturity of FiiO’s K‑series platform, the K11 delivers authoritative performance and flexible connectivity without complication.