Detail 01
B9A (Noval 9-pin) base
Uses the nine-pin Noval base format.

Independent shopping perspective
Two EL84-TK power pentode valves for guitar and hi-fi amplifier applications, made with JJ Electronic in Slovakia. The Black Diamond Series design is described as harmonically rich and tonally balanced. Its voice is associated with chime and articulation, particularly under overdrive, while the B9A Noval nine-pin base preserves the classic EL84 physical format. It suits amplifier work spanning clean sounds, classic-rock crunch, and more driven tones.

Strong match
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 01
Uses the nine-pin Noval base format.
Product questions
Straight answers to the questions shoppers most often ask about this product.
This SKU is a pair of EL84-TK power tubes.
It is a power pentode thermionic valve with a B9A Noval nine-pin base.
Reference
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