Groove Tubes GT-EL34-RD Duet Medium Tube Set: The GT-EL34-RD Power Tubes Duet features an exclusive Groove Tubes design with special "heat wings" attached to the plate for more power, longer life, and better tone. This E34 provides a big bottom, and it's very dynamic in addition to being the most powerful tube in its class. The GT-EL34-RD has an exclusive specially modified power pentode with 15 percent more power and great overall tone. Big heat sinks attached to the plates keep this one from "sagging" at full power, keeping the bass tight and treble crisp.
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