These are high-quality, tested, NOS tubes. The 5964 is listed universally as a 6J6 equivalent, but it is a different tube. So, we expect that the sound quality will be different. It's up to you to decide whether that's better or worse - welcome to tube rolling!
Every attempt will be made to match pairs in construction. Output matching is recommended, but is available with an extra charge (see TORPEDO! Tube Matching Service)
Each tube has been personally checked for defects, the glass cleaned, and the pins straightened/cleaned. They are guaranteed to work in your Torpedo, or return them for replacement (shipping not included).
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