The Story
When Streams Converges into One Pool
C9ii integrates Cayin's Amplification Technologies and Nutube Experience into a TOTL portable, battery-powered headphone Amplifier.
Gen5 Nutube 6P1 Vacuum Tube Circuit
After years of continuous circuit experimentation and technical refinement, Cayin has equipped the C9ii with an adjustable anode (plate)voltagee feature, in addition to the highly praised Classic and Modern dual tube timbre.
Fully Symmetric Headphone Amplifier
On top of being fully discrete and fully differentiated, the headphone amp. The circuit of the C9 ii adopts a fully symmetrical architecture. This improves transparency and supports a stronger load-driving capability.
Outstanding Sound Shaping Capability
C9II provides numerous features, amplification status, and timbre adjustments to satisfy the subjective preferences of our users, exploring their music library at different times/moods, different music genres, and different IEM/headphones.
Direct Battery Power Supply Module
The C911 uses four Samsung 35E battery cells to form a +8.44V DC power supply. Both C9 and C9ii are powered directly by 18650 batteries without any DC/DC conversion for voltage-boosting.
The modular battery tray is redesigned to fit with two quick-release latches.
KORG Nutube 6P1
Developed by KORG in collaboration with Noritake (2015). The Nutube 6P1 operates on the same principles as conventional vacuum tubes, using an anode grid filament structure to generate a warm, tube-like sound.
Compact, energy-efficient, and has a longer lifespan when compared to traditional vacuum tubes.
The Structure and Technologies in Nutube
Vacuum Fluorescent Display (VFD): similar principle to vacuum tubes, they have cathodes (filaments), grids, and anodes that allow electrons to flow and amplify audio signals.
Flat anode-grid-filament structure: allows for a smaller and thinner form factor, making the Nutube much more compact. The filament (cathode) emits electrons, which pass through the grid and are collected by the anode, just like the traditional vacuum tubes.
Applications of Nutube
While the Nutube is relatively compact, it is extremely prone to microphonics, just like any other directly-heated triode vacuum tube. KORG and VOX take advantage of the flat form factor and use the Nutube in guitar amplifiers, pedal kits, and keyboard amplifiers. The stationary desktop condition minimizes the microphonic effect.
Taking the Nutube into Portable Frontier
The "flattened" form factor and low heat, low power consumption characteristics are promising for portable audio applications. Numerous brands tried to develop products such as portable headphone amplifiers; unfortunately, the microphonic problem introduced serious issues for users, unsatisfactorily.
The Course of Vacuum Tubes in Cayin Portable Personal Audio
The dawn of the Vacuum Tube in Portable Audio (2018): Cayin surprised the personal audio community when we debuted the N8 DAP. This was our first project with KORG Nutube, possibly the first successful implementation in a portable player.
Second Generation Vacuum Tube Circuit for Portable Audio (2021): to achieve fully balanced, technically super
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
When Streams Converges into One Pool
C9ii integrates Cayin's Amplification Technologies and Nutube Experience into a TOTL portable, battery-powered headphone Amplifier.
Gen5 Nutube 6P1 Vacuum Tube Circuit
After years of continuous circuit experimentation and technical refinement, Cayin has equipped the C9ii with an adjustable anode (plate)voltagee feature, in addition to the highly praised Classic and Modern dual tube timbre.
Fully Symmetric Headphone Amplifier
On top of being fully discrete and fully differentiated, the headphone amp. The circuit of the C9 ii adopts a fully symmetrical architecture. This improves transparency and supports a stronger load-driving capability.
Outstanding Sound Shaping Capability
C9II provides numerous features, amplification status, and timbre adjustments to satisfy the subjective preferences of our users, exploring their music library at different times/moods, different music genres, and different IEM/headphones.
Direct Battery Power Supply Module
The C911 uses four Samsung 35E battery cells to form a +8.44V DC power supply. Both C9 and C9ii are powered directly by 18650 batteries without any DC/DC conversion for voltage-boosting.
The modular battery tray is redesigned to fit with two quick-release latches.
KORG Nutube 6P1
Developed by KORG in collaboration with Noritake (2015). The Nutube 6P1 operates on the same principles as conventional vacuum tubes, using an anode grid filament structure to generate a warm, tube-like sound.
Compact, energy-efficient, and has a longer lifespan when compared to traditional vacuum tubes.
The Structure and Technologies in Nutube
Vacuum Fluorescent Display (VFD): similar principle to vacuum tubes, they have cathodes (filaments), grids, and anodes that allow electrons to flow and amplify audio signals.
Flat anode-grid-filament structure: allows for a smaller and thinner form factor, making the Nutube much more compact. The filament (cathode) emits electrons, which pass through the grid and are collected by the anode, just like the traditional vacuum tubes.
Applications of Nutube
While the Nutube is relatively compact, it is extremely prone to microphonics, just like any other directly-heated triode vacuum tube. KORG and VOX take advantage of the flat form factor and use the Nutube in guitar amplifiers, pedal kits, and keyboard amplifiers. The stationary desktop condition minimizes the microphonic effect.
Taking the Nutube into Portable Frontier
The "flattened" form factor and low heat, low power consumption characteristics are promising for portable audio applications. Numerous brands tried to develop products such as portable headphone amplifiers; unfortunately, the microphonic problem introduced serious issues for users, unsatisfactorily.
The Course of Vacuum Tubes in Cayin Portable Personal Audio
The dawn of the Vacuum Tube in Portable Audio (2018): Cayin surprised the personal audio community when we debuted the N8 DAP. This was our first project with KORG Nutube, possibly the first successful implementation in a portable player.
Second Generation Vacuum Tube Circuit for Portable Audio (2021): to achieve fully balanced, technically super
