Korg NuTekt HA-S

Nutube Headphone Amplifier Kit

(Inc. VAT)
(Ex. VAT)
In Stock With Supplier
Current Stock:

3 years warranty
Free Delivery

Frequently bought together

Add main item and selected items for: £221
Key Info
Korg NuTekt HA-S is a Nutube Headphone Amplifier Kit that features A revolutionary new fully analogue vaccuum tube

Easy and Fun

Since no soldering is required, anybody can put together the Korg HA-S headphone amplifier kit.

What's more, it's easy and fun! Now it's your chance to enjoy the authentic vacuum tube sound loved by audophiles.

Powered by Nutube

A revolutionary new fully analogue vaccuum tube, Nutube is at the heart of the Korg NuTekt HA-S's fantastic audio.

Just like a traditional vacuum tube, Nutube features an anode, grid and filament so it works as a complete triode tube. Because of this, Nutube is able to generate the same great response and beautifully rich harmonic character that conventional vacuum tubes.

The difference is; Nutube is much more compact, stable and energy efficient!

The case of the HA-S headphone amplifier is transparent so you can even see the glow of the tube at work.

Furthermore, with its filament powered by a DC to DC converter, Nutube is extremely power efficient and can be run off just two A4 batteries.

Fantastic Sound

Of course, sound is the most important part of this DIY headphone amp kit and we're sure you won't be disappointed.

Equipped with an NFB (Negative Feedback) switch, the HA-S headphone amplifier allows you to choose between high fidelity, clean sound or the warmer, harmonically rich sound you expect from a vacuum tube.

You can further modify the sound of the Korg HA-S with the two included OP amp options for the output.

You can install the MUSE01 for premium audio or the industry standard NJM4580.

What's more, these can be replaced easily so you can really customise the Korg HA-S headphone amplifier to your own exact liking.

With the circuit diagrams readily available, advanced users can easily customise the HA-S amplifier even further.

Easy and Fun with Exceptional Audio

Putting together the Korg HA-S Nutube headphone amplifier is extremely easy and very fun to do.

Buy the Korg Nutekt HA-S Nutube headphone amplifier kit from PMT Online to get premium audio with a warm, analogue tube-driven signal boost.


  • No Soldering Required
  • Great Introduction to DIY Audio Equipment
  • Nutube Powered
  • Energy Efficient
  • Powered by Just Two AA Batteries
  • Analogue Tube-Driven Pristine Sound

UK Delivery

FREE Standard Delivery on orders over £99.00.

Orders placed before 4pm will normally be dispatched the same day.

Please refer to our delivery schedule for exceptions.

Delivery Upgrade Options (Over £99)

  • DPD Express Next Working Day - £4.99
  • Next Working Day Pre 12pm - £8.99
  • Saturday / Sunday - £9.99

Click here to view our delivery options

At Music Matter, our goal is to ensure complete satisfaction with your purchase.

If, for whatever reason, you are dissatisfied with your purchase, you can return it to Music Matter within 30 days of receiving the item, providing it arrives back in new condition.

You have the option of receiving a full refund / exchange within 14 days, or, exchange / credit only within 30 days.

Full Refund Within 14 days

In order to receive a full refund, you must notify us within 14 days of receiving the goods. Once you have notified us you will have 14 days to return the product to us.

Exchange Within 30 days

In order to exchange an item, you must notify us within 30 days of receiving the goods. Once you have notified us you will have days to return the product to us.

Goods received back 14 days after the cooling of period ends may be rejected.

Your returns period starts the day after you receive the item(s)

Click here to view our full Returns Policy.

Secure Online Payment Powered By Sage Pay 

We accept the following debit / credit cards:

Card Payments


Pay for your item(s) in just a few clicks with PayPal. PayPal

Finance provided By etika

We have partnered with etika so you can spread the cost of your purchase. Simply add the items you love to your basket. Once you are at the checkout choose "Apply for Finance" as your payment option.

Who can apply for finance?

  • You must be over 18 years of age.
  • You must be employed at least 16 hours per week, self-employed, retired in receipt of a pension or receiving disability payments.
  • You must be a permanent UK resident with at least 3 years UK address history.
  • You must have a good credit history with no late payments, debt relief orders, CCJs, IVAs or bankruptcies.
  • You must have an active valid email address.

Please click here for the full details about paying by finance.

Pay Later with PayPal Pay in 3

Split purchases into three interest-free monthly payments at millions of stores online.

Subject to status. UK residents only. Late fees apply. PayPal is a responsible lender. Pay in 3 performance may influence your credit score. T&Cs apply.

Check out securely with PayPal and choose Pay in 3 from your account.

Subject to status. Terms and Conditions apply. UK residents only. PayPal is a responsible lender. Pay in 3 performance may influence your credit score. PayPal Pay in 3 is a trading name of PayPal (Europe) S.à.r.l. et Cie, S.C.A., 22-24 Boulevard Royal, L-2449, Luxembourg.

Click here to learn more about Pay in 3.

Minimum 12 Months Warranty

All new & used goods supplied by Music Matter are warranted free from defects for 12 months from the date of supply (unless otherwise stated).

Extended Warranty

Many manufacturers offer a free extended warranty upon registration.