Loading the content...
Cart 0 items for £0.00

No products in the cart.

Eufonika H4 Tube Amplifier Vacuum Tube Upgrade Kit

‹Return to Previous Page


We offer a Matched Pair of military spec 6N6 Tube Equivalent 6N6P with a choice of standard or premium 6N1 Preamp Vacuum Tube.

Our Tube are direct drop-in Upgrades and therefore suitable for many Eufonika, Nobsound, Liston and Douk Audio models.

Because our Vacuum Tubes are fully Bench tested, they are therefore guaranteed No leaks or shorts.

Our 6N6 Tube Equivalent 6N6P are Russian Military Manufacture, USSR c.1970/80s so have a long Life expectancy of 5000 hrs. They also feature Nickel Plated pins, gold grid.


Standard 6N1P Russian Military Manufacture, USSR c.1970/80s Life expectancy: 2000 hrs.


Premium 6N1P-EV Russian Military, USSR c.1970/80s so have a long Life expectancy of 5000 hrs. Also, they feature Nickel Plated pins plus gold grid.

A very good sound Upgrade! Expect improved tighter and deeper bass. Open mid-range and detailed treble plus better timing and overall cohesion.

The Pre-amp section comes with a free BS310 Anti-Vibration Damper.

Full fitting instructions are included.

If you are unsure about your Amplifier’s requirements you can download a .pdf User Manual for free here

Never buy these tubes from an untrusted source. Vintage tubes can cause serious damage untested. We check all valves extensively within the UK. Next Day Dispatch. No lengthy returns or customs duties! *


More Info

Additional information

Weight 0.26 kg

Standard, Premium

Returns & Delivery

We offer a No-Quibble 30 -Day Return & Refund on all our Products. Please refer to our Return & Refund Policy for full details.

We aim to ship next Working Day by your chosen Postal Service. See our Shipping Policy for further details.


Related Products

Back to top

Newsletter Signup