{"product_id":"ray-tubes-300b-reserve-vacuum-tube","title":"Ray Tubes 300B RESERVE Vacuum Tube","description":"\u003ch1\u003e\u003cb\u003eThe Best of the Best\u003c\/b\u003e\u003c\/h1\u003e\n \u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe RESERVE Collection of Ray vacuum tubes are artfully designed and carefully manufactured solely for hifi audiophile devices. With the RESERVE, vocals are a revelation: smooth, lifelike, and beautifully present. They convey a sense of realism and immediacy without any bloat, offering a gentle yet compelling delivery with superior decay. The treble is crisp yet laid-back, carefully balanced to avoid sibilance or harshness. This balanced sound signature extends to the low-end as well: full and commanding, contributing to an overall superbly realistic imaging that is brain-scratchingly good.\u003c\/span\u003e\u003c\/p\u003e\n \u003ch2\u003e\u003cb\u003eEngineered Exclusively for Audiophile Systems\u003c\/b\u003e\u003c\/h2\u003e\n \u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eExplicitly engineered for audiophile applications, the RESERVE Collection of vacuum tubes are crafted through a unique process that targets the specific needs of audiophiles, focusing on critical sound characteristics such as vocal realism, texture, and extended bass. Every aspect of their design and manufacture is aimed at enhancing the listening experience in high-fidelity systems.\u003c\/span\u003e\u003c\/p\u003e\n \u003ch2\u003e\u003cb\u003eEnsuring Excellence\u003c\/b\u003e\u003c\/h2\u003e\n \u003cp\u003eEvery vacuum tube in the RESERVE Collection is subjected to a stringent quality assurance process. An audio engineer personally assesses each vacuum tube against a detailed checklist that includes sound profile, dynamics, microphonics, gain, conductance, and noise levels, along with overall performance. This ensures not only that the vacuum tubes align with audiophile expectations for sound quality but also that they meet our rigorous standards for reliability and consistency. \u003c\/p\u003e\n \u003ch2\u003e\u003cb\u003eGold Pins: Excellence in Every Detail\u003c\/b\u003e\u003c\/h2\u003e\n \u003cp\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch—they're built to last.\u003c\/p\u003e\n \u003ch2 class=\"h2\"\u003e\u003cstrong\u003eMagic Coating\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cp\u003eSome things are better left unseen. You can’t see inside the RESERVE tube because it’s coated with something called monocrystalline carbon. This layer allows for quicker electron transmission, keeps the glass cool, and blocks out noise. If you’ve got an engineering background, you might find the science fascinating. For the rest of us, it’s basically magic. The coating is delicate and tough to apply, which complicates production. That’s why Ray only uses it for their RESERVE tubes—and why it costs more. When all’s said and done, it just means one thing—the sound is amazing.\u003c\/p\u003e\n \u003ch2\u003e\u003cb\u003eSuperior Sound, Secured\u003c\/b\u003e\u003c\/h2\u003e\n \u003cp\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/p\u003e\n \u003ch3\u003e\u003cstrong\u003eRay Tubes Quality Control\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cp\u003eFrom extensive burn-in to expert listening sessions, Ray Tubes goes above and beyond to guarantee each tube they sell is ready for your high-end system. \u003ca href=\"https:\/\/raytubes.audio\/blogs\/news\/ray-tubes-1-year-warranty-quality-control\" rel=\"noopener\" target=\"_blank\"\u003eRead more about the process on their blog.\u003c\/a\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n \u003ch3\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003e\u003cspan\u003eHand-selected and tested\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n \u003cli\u003e\u003cspan\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/li\u003e\n \u003cli\u003e\u003cspan\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/li\u003e\n \u003cli\u003e\u003cspan\u003eMagic Coating: Monocrystalline carbon coating enhances sound by\u003cbr\u003ecooling, blocking noise, and allowing for quicker electron transmission\u003c\/span\u003e\u003c\/li\u003e\n \u003cli\u003e\u003cspan\u003eLow noise and microphonics\u003c\/span\u003e\u003c\/li\u003e\n \u003cli\u003e\u003cspan\u003eMatched quad (4 tubes) or pair (2 tubes) or single tube (1 tube)\u003c\/span\u003e\u003c\/li\u003e\n \u003cli\u003e\u003cspan\u003eFewer than 5% of the tubes commissioned for production meet our voltage, current, and sound signature standards \u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n \u003cli\u003e\u003cspan\u003e12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003eTube type: 300B\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eSocket: 4-pin\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eOutput Power\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003ePower Output (Pout): 6.6 W\u003c\/p\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eFilament Specification\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003eFilament Voltage (Uf): 5 V\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eFilament Current (If): 1.2 A\u003c\/p\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eMaximum Rating\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003eAnode Voltage (Ua): 480 V\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eAnode Dissipation Power (Pa): 40 W\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eCathode Current (Ik):\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003eSelf Bias: 100 mA | Fixed Bias: 70 mA\u003c\/p\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eInterelectrode Capacitance\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003eInput Capacitance (Cin): 9 pF\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eOutput Capacitance: 4.3 pF\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eTransfer Capacitance: 15 pF\u003c\/p\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eStatic Parameters\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003eAnode Voltage (Ua): 300 V\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eGrid Voltage (Ug): -60 V\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eAnode Current (Ia): 60 mA\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eTransconductance (Gm): 5.5 mA\/V\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eInternal Resistance (Ri): 0.7 kΩ\u003cbr\u003e\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eAmplification Factor (μ): 3.85\u003c\/p\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp\u003e\u003cb\u003eCompatible Amps\u003c\/b\u003e\u003c\/p\u003e\n \u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\" target=\"_blank\"\u003e\u003cspan\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n \u003ch3\u003e\u003cb\u003eWhat's included\u003c\/b\u003e\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003e\u003cspan\u003eRay Tubes 300B RESERVE Vacuum Tube\u003c\/span\u003e\u003c\/li\u003e\n \u003cli\u003e\u003cspan\u003eUser handbook featuring burn-in guidelines\u003c\/span\u003e\u003c\/li\u003e\n \u003cli\u003e\u003cspan\u003eCertificate of authenticity and warranty\u003c\/span\u003e\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3\u003e\u003cstrong\u003eHelp Shape Our Vacuum Tube Legacy\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cp\u003e\u003cspan\u003eWith the launch of our Ray Vacuum Tubes, we embark on an exciting mission to create a comprehensive lineup of tubes that cater to the discerning audiophile. We view this as a collaborative journey with the audiophile community and value your feedback and support to shape our future tube lineup. \u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-feedback-blog\" target=\"_blank\"\u003eLet us know what other tubes you'd like us to create.\u003c\/a\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n \u003ch3\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp\u003e \u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Matching Quad (4 tubes)","offer_id":46878533976239,"sku":"APS-0979-3","price":1980.0,"currency_code":"USD","in_stock":true},{"title":"Matching Pair (2 tubes)","offer_id":46878534009007,"sku":"APS-0979-2","price":960.0,"currency_code":"USD","in_stock":true},{"title":"Single (1 tube)","offer_id":46878534041775,"sku":"APS-0979-1","price":450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6415\/2239\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-300b-reserve-vacuum-tube-42234815414508.jpg?v=1778010452","url":"https:\/\/freshized.com\/products\/ray-tubes-300b-reserve-vacuum-tube","provider":"Freshized","version":"1.0","type":"link"}