Korg HA-S Nutube Headphone Amplifier DIY Kit

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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 AAA 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 Swi