Ray Tubes

Ray Tubes Select KT88

$92.00
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Quantity: Single Tube
The Ray Tubes Select Series are the cream of the crop performers. Only the top 4% of production tubes get to be Select. They feature gold plated pins, low microphonics, and a 1 year warranty. They are smoother sounding and more refined than their CORE series counterparts.

Tube: 300B

The KT88 is a beam tetrode introduced in 1956 as a variant of its smaller cousin, the KT66. Its name is derived from kinkless tetrode, an earlier name for the beam tetrode, and itʼs been popular in high-fidelity stereo systems since its introduction. Since New Old
Stock of the KT88 is especially rare, Ray Tubes is proud to offer brand-new KT88 vacuum tubes.

The SELECT 300B captures the heart of what makes the 300B tube legendary—lush mids, graceful highs, and a coherent, musical bass foundation. Bass is controlled and cohesive, with moderate extension and just the right amount of body. Ideal for genres like acoustic, jazz, and classical.

  • The midrange is where the SELECT 300B truly excels. Rich, full-bodied tonal character with a touch of warmth. Vocals are especially well rendered, from baritone to soprano.
  • Delivers the characteristic smoothness of the 300B, with a layered treble extension and a natural sense of sparkle. A soft warmth in the upper register gives strings and female vocals a refined presence.

The Ray Tubes Story

RayTubes was created to supply the audiophile and hi-fi market with high-quality, new-production vacuum tubes designed specifically for audio equipment. The company partners with manufacturers to create tubes to their specifications, subjects them to a rigorous quality control process that includes listening tests by sound engineers, and offers them through various partners and retailers like Tweek Geek.

With a twelve-month warranty covering tubes against manufacturing defects, weʼll take care of you during the first year of their ownership.

The Select Series

Premium SELECT tubes are manufactured and tested to meet a higher tolerance standard, and will provide superior and more nuanced sound than tubes from the CORE collection. Only the best tubes from any manufacturing batch will ever emerge from the factory, and the SELECT tubes are the cream of the crop of any given batch. SELECT tubes are not only tested for their superiority, but placed in amplifiers and listened to under real world conditions by audio engineers.

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Product Highlights

  • Hand-selected and tested (Only 4% of the tubes commissioned for production meet their standards for gain and conductance matching)
  • Gold pins for oxidation resistance
  • Low noise and microphonics 
  • 12-month warranty against manufacturing defects