(1 customer review)

Mesa 6L6GC STR 420

This product is currently out of stock and unavailable.


Beam tetrode power tube known for its sweet, warm tone. Valve number equivalents include 6L6GC, 6L6GCR, 6L6G, 6L6GA, 6L6GB. This is the STR 420 style. These tubes are compatible with 5881 and any 6L6.


Additional information

Weight 3 oz
Dimensions 3.75 × 2 × 2 in
Matched Sets

Single Tube, Matched Pair, Matched Quad

1 review for Mesa Boogie 6L6GC Brown Base STR 420 Power Tube

  1. John R. Littlewood

    These made my Mark IV sound new again. Bold and neutral just the way I like. I replaced a lightly used set of new STR 440 and there’s just something about the 420’s that brought back the girth. These are the tubes that came OEM in my mark IV.

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