{"product_id":"ray-tubes-select-5u4","title":"Ray Tubes SELECT 5U4","description":"\u003ch2\u003eSELECT 5U4\u003c\/h2\u003e\n\u003cp\u003eThe 5U4 is a common full-wave rectifier tube used in power supplies to convert alternating current to direct current. Its twin-diode design uses a shared cathode and two anodes to convert both halves of the AC cycle. Rectifiers like the 5U4 are sometimes overlooked by audiophiles, but like power and signal tubes, they can greatly influence the sound of a tube amplifier.\u003c\/p\u003e\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cp\u003eSELECT is the Ray Tubes tier most listeners should start with. Hand-selected, gold-pinned, and consistent enough that the tube stops being the variable in your system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned and manufactured by a team with decades of experience\u003c\/li\u003e\n\u003cli\u003eHand-selected by engineers to ensure only the top tubes make the cut\u003c\/li\u003e\n\u003cli\u003eGold pins for durability and longevity\u003c\/li\u003e\n\u003cli\u003eSubstantially more consistent performance than New Old Stock\u003c\/li\u003e\n\u003cli\u003eUnlike NOS and most other new production, covered by the Ray Tubes\u003cbr\u003eOne Year Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSounds Characteristics\u003c\/h2\u003e\n\u003cp\u003eThe SELECT 5U4 helps create a sonic profile that is smooth on top, full through the midrange, and grounded in natural, unforced bass. Its contribution is subtle but essential, enhancing the musicality, depth, and coherence of any tube- based system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe bass is characterized by composure and textural integrity, with excellent rhythm stability integrating seamlessly into the soundstage.\u003c\/li\u003e\n\u003cli\u003eThe midrange frequencies impart a sense of richness and organic flow. The SELECT 5U4's inherent smoothness allows instruments like piano, guitar, and saxophone to show their warmth and clarity.\u003c\/li\u003e\n\u003cli\u003eThe treble performance is smooth and refined, reducing the grain and edginess often associated with more aggressive rectifiers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAvailable as a single tube ( RT-SL-5U4-X1 )\u003c\/li\u003e\n\u003cli\u003eUser handbook featuring burn-in guidelines\u003c\/li\u003e\n\u003cli\u003eCertificate of authenticity and warranty\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ray Tubes","offers":[{"title":"Default Title","offer_id":47539139805268,"sku":null,"price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/7321\/3524\/files\/SELECT5U4-02.jpg?v=1787333596","url":"https:\/\/prospercables.com\/products\/ray-tubes-select-5u4","provider":"Prosper Cables ","version":"1.0","type":"link"}