Product highlights:
- Popular alternative to 6L6 power tubes due to earlier “break up” point
- Compatible with some but not all 6L6 powered amplifiers
- Compact design and commonly found in many boutique amplifiers
- Hand Tested and matched in quartets (a set of 4 tubes)
Groove Tubes Short Bottle High Vacuum Power Tube
Experience the GT-5581-C power tube with Groove Tubes' exclusive high-powered 5881 "short bottle" design. This stable, high-vacuum tube design provides sweet tone and vibrant tonal character, which is why it was a mainstay in Groove Tubes's tweed era amps from the '50s and early '60s. The tube's shorter height makes it ideal for installation in rack mount-style amplifiers.
- Popular alternative to 6L6 power tubes due to earlier “break up” point
- Compatible with some but not all 6L6 powered amplifiers
- Compact design and commonly found in many boutique amplifiers
- Hand Tested and matched in quartets (a set of 4 tubes)
Ratings and reviews
Groove Tubes Short Bottle High Vacuum Power Tube 

Groove Tubes Short Bottle High Vacuum Power Tube
SKU: GT-5881-CQ-H