The Shuguang KT66 is functional art. The specs on this tube are very similar to the 25-watt originals. They draw more heater current than a standard 6L6: 1300mA instead of the usual 900mA. You should be sure that your amp's power transformer has the capacity to handle the extra current draw. Bias these tubes hot for best results.

The Shuguangs sound very bright and crystalline when biased at around 60% of their rated plate dissipation.

At 75% of rated dissipation, these tubes really provide that feeling of rolling thunder.

If you want Country clean, bias them for 60-70%

Note: If you buy 2, 4 or 6 tubes the entire set will be matched.



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