This is a comparison of 6L6 power tubes in a Fender Super Reverb Reissue. The tubes are Ruby (JJ), Tung-Sol, Svetlana (new production), used old stock GE 6L6GC (test strong) and NOS RCA "black plate" 6L6GC. Tubes were biased for best sound, with the bias settings ranging from 37 to 42. It's not an exciting video, but I hope it will help those who are trying to decide which power tubes to buy.

I should note the the GHS strings and Klein pickups already give the guitar a warm, soft sound.

I did not attempt to test for distortion, as I can't think of a way to do so objectively.

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