5687 Tung-Sol (Selected for Line-Level Use). Originally Developed & Patented by Tung-Sol in 1948

• One of the tubes that built America and won WW2
• Most favored 5687 in history by both engineers and music lovers.
• 1950’s Big D-Getters help make this tube a real winner.
• Great for power supplies and all kinds of amplifiers.
• Big clean and clear bold sound. Both sweet and detailed at the same time!
• Color code (Red = Line Level Suitable for Amplifier or Pre-Amplifier Out or Second Stage use)

If multiple tubes are ordered, micro matching is automatic.