Ray Tubes Select 12AT7 (Matched Quad is currently out of stock until second week of July.)

Clear, tonally dense, just a hint of butter or sweetness

These tubes are phenomenal and, paired with the P75, sound as if they were made for one another. Clarity in this combination comes surprisingly close to what I hear with a direct DAC to amp connection, just adds a touch of buttery richness, tonal saturation, and greater bass drive... would agree with Terry of Pursuit Perfect System that these bring a real sense of "va-va-vroom" to the presentation, inject energy, color, and excitement in a way that can feel almost like an amplifier upgrade.

Using the P75 Ray tubes provided a step up in the upper low to midrange bite. A noticeable presence that I do enjoy!

Used in gallion P75 clarity but less natural

Used in gallion P75. Need 200 to 300 hours burnin. Provided a good level of clarity but lack some natural tone using all four compared to some psvane and mullards i have. Better with only 2 with 2 of other brands.