Mullard 12AU7 Long Plate K61
Made in Great Britain – Blackburn Factory

Rare [] Getter

Warm. Smooth. Musical. The Mullard 12AU7 long plate (K61 code) is a true British classic—and one of the most sought-after 12AU7s ever made. Manufactured at the famous Blackburn plant, these tubes are instantly recognizable by their tall gray plates and etched "K61" date codes.

Whether you’re chasing vintage warmth for your hi-fi system or lush harmonic depth in a guitar preamp, the Mullard K61 delivers. It’s known for its rich midrange, rounded highs, and full-bodied low end, all wrapped in that unmistakable Mullard character. Compared to later short plate versions, the long plate K61 has more depth, air, and openness—making it a top-tier choice for critical listening or musical tone shaping.

Why It Rules:

• Legendary Mullard warmth and musicality

• Long plate construction for increased dynamics and harmonic content

• Made in the Blackburn UK factory—true NOS pedigree

• Perfect for audiophile preamps, high-end hi-fi, and vintage guitar amps

Matched, tested, and ready to bring life back to your gear.