British Audio is proud to offer this high-power Octal Beam Tetrode by Electro-Harmonix! Suitable for any amp using 6550 or KT88, it's designed to hold up in even the most punishing environment of high powered bass amps!

Perfect for Ampeg SVT bass amps!

• Thanks to extra headroom, bass players can realize the full dynamic and tonal range of the instrument
• Nickel steel side rod mica supports sweet tone regardless of setup, even in combos where the tube is only inches from the speaker