
Korg Nu Tekt - HA-S Nutbe Headphone Amp Kit
Korg Nu Tekt - HA-S Nutbe Headphone Amp Kit - DIY build your own Headphone Amp Kit
Email me when the availability or price changes
Finance this product
- Spend over £280.00 and Buy Now, Pay Later or spread the cost of your finance over 24-48 months with a 10% deposit.
- SCANPROTECT Protect against installation damage for 28 days.
Korg Nu Tekt - HA-S
DIY Headphone Amplifier

NUTUBE Equipped DIY HEADPHONE AMPEver wanted to build your own tube-powered headphone amp? Now you can!
The HA-S is a DIY Nutube-equipped headphone amplifier which enables you to enjoy the highest-quality audio, no matter where you are. Inexperienced in DIY? Fear not! The HA-S requires no soldering whatsoever, so even the most DIY-shy of us can get a piece of this warm, analogue, tube-driven signal boost in no time at all, enriching your audio and bringing the very best out of your music.
Build your own Headphone Amp!

with no prior DIY experience
Inexperienced in DIY? Fear not! The HA-S requires no soldering whatsoever, so even the most DIY-shy of us can get a piece of this warm, analogue tube-driven signal boost in no time at all.
Nutube is a revolutionary, 100% analogue vacuum tube developed by Korg alongside Noritake Itron Corporation. In the same manner as a traditional vacuum tube, Nutube is comprised of an anode, grid and filament, and operates as a complete triode tube, effectively generating the response and the same harmonic rich characteristics of traditional vacuum tubes in a more compact, reliable and energy-efficient way.
The clear casing of the HA-S gives a glimpse into this technology, ensuring the satisfying warm glow of the tube is visible at all times.
Energy Efficient? Check!

Powered using only 2 AA batteries
The Nutube’s filament is powered by a DC > DC converter, which requires less electric current and therefore allows for a longer battery life than other vacuum tubed amplifiers available on the market.
The design here is so efficient that the HA-S is capable of driving the Nutube with a line voltage of 26V using only 2 AA batteries, and still delivers rich, organic and authentic tube sound.
Maximum Customisation

tweak your AMp how you like it
The HA-S has a unique Negative Feedback (NFB) switch, which allows the user to select a high fidelity clean and pristine sound, or a warmer, harmonically rich texture as one may expect from a vacuum tube.
With the NFB switch in the off position, the harmonics present in the Nutube are amplified to create a sound which is incredibly rich in harmonic content, warmth and textures.
Alternatively, with the NFB switched on, the distortion ratio and frequency characteristics are modified, which helps to portray a very detailed and clean sound.
With regards to further modification to sound, the HA-S includes two OP amp options for the output: the premium audio oriented ‘MUSES01’ and the industry standard ‘NJM4580’, both from JRC. These are replaced with no problems should they need to be, so even the most die-hard audiophile will have the opportunity to customise and adapt the sound of their HA-S as much as you’d like to.
For the more adventurous users who’d like to customise their HA-S ever further, the circuit diagrams have been made readily available, allowing users to swap and change discrete component and create your very own unique headphone amp to match your desired tone and performance. The possibilities are literally, quite endless