Korg HA-S Nutube Headphone Amplifier DIY Kit

Overview

The Korg HA-S Nutube Headphone Amplifier DIY Kit features audiophile components, injecting warm, analogue tube-driven signal boost to any sound source. With no soldering required, the HA-S is simple to assemble, so you can quickly and easily enjoy quality audio anywhere.

Developed by Korg and Noritake Itron Corp, the Nutube is a miniaturised fully analogue vacuum tube constructed with anode, grid, and filament, operating like a conventional vacuum tube in a more compact, stable, and energy efficient way. What's more, you can further customise the HA-S by switching the negative feedback (NFB) circuit in or out of the signal path, allowing for a clean, pristine, and high-fidelity sound, or a more harmonically rich tone. Also included are two OP amps for further modifications. Advanced users will appreciate the available circuit diagrams for switching out discrete components.

Key Features:

Build Your Own Headphone Amplifier

• DIY kit allows you to build your very own headphone amplifier.
• No soldering needed.
• Authentic vacuum tube sound.

Built-In Nutube

• Fully analogue vacuum tube utilising the same components as a conventional vacuum tube.
• Constructed with an anode, grid, and filament, and operates as a complete triode tube.
• Generates the same response and rich harmonic characteristics of conventional vacuum tubes.
• Compact, stable, and energy efficient.
• Transparent case allows the glow of the tube to be visible at all times.

Energy Efficient

• Powered by a DC to DC convertor.
• Consumes less electric current for a longer battery life.
• Efficient design utilises a 26V line voltage using only two A4 batteries.

Customisable Sound and Modifications

• Negative Feedback (NFB) circuit allows for a clean, pristine, and high-fidelity sound, or a warmer, more harmonically rich sound as expected from a vacuum tube.
  • NFB Switch Off: Harmonics present in the Nutube (triode tube) will be amplified to create a sound rich in harmonics, warmth, and textures.
  • NFB Switch On: Distortion ratio and frequency characteristics will be modified, creating a detailed and clean sound.
• Sound Modification.
  • Two OP amp output options included.
  • JRC MUSE01: Premium audio oriented.
  • JRC NJM4580: Industry standard.
• Customise and adapt the sound.
  • For advanced users.
  • Circuit diagrams available.
  • Easily change discrete components to make your own unique headphone amp matching your desired tone and performance.

Specifications