TAD 6550ASTR/4 Selected Power Tube Quartet

Discover the TAD 6550ASTR/4 select power tubes, a quartet that reinterprets the classic GE6550A. Since September 2010, the TAD 6550A-STR has been manufactured with a stronger and exceptionally pure anode mat. Thanks to the extensive TAD burn-in and forming process, the 6550A-STR offers unparalleled consistency and stability, even surpassing the 6550C.

This tube is perfect for critical applications like the Ampeg SVT (use only without a tube holder!). The TAD 6550A-STR features a heavy, straight glass envelope, a polished metal base, and the original triple getter construction. The result is a balanced tube known for its impressive bass and rich midrange.

With smooth, fluid bass and a natural tone, this tube has a wide, open character, making it extremely popular for bass guitar amplifiers and high-end hi-fi applications. The TAD 6550C-STR's specifications equal or exceed those of the classic 6550A tubes, making it a brilliant performer in any application requiring a 6550. Upgrade to the TAD 6550A-STR for unparalleled sound quality.

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