Cayin N3Ultra NOS Tube Digital Audio Player

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.

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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.

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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.

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Technical Specifications

Specification	Value	Notes
Product Type	Portable digital audio player (wired)	Pure offline DAP; no Wi‑Fi/Bluetooth to protect tube performance.
DAC architecture	Dual AKM AK4493S in mono	Fully differential output; improved separation.
Tube stage	2 × Raytheon JAN6418 NOS	Gen3 two‑stage timbre circuit; shock‑absorbing suspension minimizes microphonics.
Timbres	Classic, Modern, Solid‑State	Selectable on all analog outputs (PO and LO).
Analog outputs	3.5 mm SE PO/LO, 4.4 mm BAL PO/LO (shared)	Balanced and SE both support tube or solid‑state timbre.
Output power	250 mW @ 32 Ω (SE), 600 mW @ 32 Ω (BAL)	Drives virtually all IEMs and many portable headphones.
Digital I/O	USB‑C audio in/out; S/PDIF coax (via USB‑C)	Asynchronous USB DAC; coaxial embedded in USB‑C.
Decoding	PCM 32‑bit/768 kHz; DSD512 (native)	Wide format support for local libraries.
Storage	microSD (TF) up to 1 TB; USB OTG	Expandable, library‑friendly.
OS/UI	Customized Android 8.1; 10‑band parametric EQ	DTA bypass; audio‑first interface.
Display	4.1" 720×1280 TFT touchscreen	Clear, responsive control in a compact form.
Battery	4500 mAh; QC3.0 fast charge	Up to 11.8 h (SE/SS) or 7.6 h (BAL/tube); ~1 h from 20%→80%.
Dimensions	125 × 65.5 × 19.5 mm	Pocket‑friendly.
Weight	~204 g	Ideal for one‑hand use and daily carry.

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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.

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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.