{"title":"Ray Tubes","description":"","products":[{"product_id":"ray-tubes-select","title":"Ray Tubes Reserve EL34","description":"\u003ch1\u003eRay Tubes Reserve EL34\u003c\/h1\u003e\n\n\u003cp\u003eEL34 power pentode. Introduced by Mullard 1955, British output tube character. Reserve tier — highest QC selection standard.\u003c\/p\u003e\n\n\u003ch2\u003eThe Ray Tubes Approach\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes was created specifically for the audiophile and hi-fi market — not repurposed industrial tubes, not rebranded commodity production. They partner with manufacturers to build tubes to audio-specific specifications, then subject every batch to QC that includes both electrical testing and listening evaluation by sound engineers. The Reserve tier represents the results of that process at the highest selection standard.\u003c\/p\u003e\n\n\u003ch2\u003ePress Recognition\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes is a newer brand without extensive press coverage yet. Our own evaluation and customer feedback in amplifier applications has been consistently positive — comparable in character to better NOS options at a fraction of the cost.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTube type: EL34\u003c\/li\u003e\n\u003cli\u003eProduction: New production to Ray Tubes specifications\u003c\/li\u003e\n\u003cli\u003eQuality control: Electrical testing plus listening evaluation\u003c\/li\u003e\n\u003cli\u003eTier: Reserve\u003c\/li\u003e\n\u003cli\u003ePricing: Per pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eQuestions about matching these to your specific amplifier, or which tier is appropriate for your application? Reach out.\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Single Tube","offer_id":42764449710147,"sku":null,"price":196.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair","offer_id":42764449742915,"sku":null,"price":460.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad","offer_id":42764449775683,"sku":null,"price":989.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0572\/0522\/7587\/files\/Ray-Tubes-Reserve-EL34-Tweek-Geek-26847227248707.jpg?v=1779252026"},{"product_id":"ray-tubes-select-12au7","title":"Ray Tubes Select 12AU7","description":"\u003ch1\u003eRay Tubes Select 12AU7\u003c\/h1\u003e\n\n\u003cp\u003e12AU7 dual triode, 9-pin. Medium-gain general-purpose triode. Common in driver and buffer stages. Select tier.\u003c\/p\u003e\n\n\u003ch2\u003eThe Ray Tubes Approach\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes was created specifically for the audiophile and hi-fi market — not repurposed industrial tubes, not rebranded commodity production. They partner with manufacturers to build tubes to audio-specific specifications, then subject every batch to QC that includes both electrical testing and listening evaluation by sound engineers. The Select tier represents the results of that process at an accessible selection standard.\u003c\/p\u003e\n\n\u003ch2\u003ePress Recognition\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes is a newer brand without extensive press coverage yet. Our own evaluation and customer feedback in amplifier applications has been consistently positive — comparable in character to better NOS options at a fraction of the cost.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTube type: 12AU7\u003c\/li\u003e\n\u003cli\u003eProduction: New production to Ray Tubes specifications\u003c\/li\u003e\n\u003cli\u003eQuality control: Electrical testing plus listening evaluation\u003c\/li\u003e\n\u003cli\u003eTier: Select\u003c\/li\u003e\n\u003cli\u003ePricing: Per pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eQuestions about matching these to your specific amplifier, or which tier is appropriate for your application? Reach out.\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Single Tube","offer_id":42764452134979,"sku":null,"price":92.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair","offer_id":42764452167747,"sku":null,"price":207.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad","offer_id":42764452200515,"sku":null,"price":449.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0572\/0522\/7587\/files\/Ray-Tubes-Select-12AU7-Tweek-Geek-26831183151171.jpg?v=1779252025"},{"product_id":"ray-tubes-select-12ax7","title":"Ray Tubes Select 12AX7","description":"\u003ch1\u003eRay Tubes Select 12AX7\u003c\/h1\u003e\n\n\u003cp\u003e12AX7 dual triode, 9-pin. High-gain input and driver tube, ubiquitous in preamplifiers and input stages. Select tier.\u003c\/p\u003e\n\n\u003ch2\u003eThe Ray Tubes Approach\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes was created specifically for the audiophile and hi-fi market — not repurposed industrial tubes, not rebranded commodity production. They partner with manufacturers to build tubes to audio-specific specifications, then subject every batch to QC that includes both electrical testing and listening evaluation by sound engineers. The Select tier represents the results of that process at an accessible selection standard.\u003c\/p\u003e\n\n\u003ch2\u003ePress Recognition\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes is a newer brand without extensive press coverage yet. Our own evaluation and customer feedback in amplifier applications has been consistently positive — comparable in character to better NOS options at a fraction of the cost.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTube type: 12AX7\u003c\/li\u003e\n\u003cli\u003eProduction: New production to Ray Tubes specifications\u003c\/li\u003e\n\u003cli\u003eQuality control: Electrical testing plus listening evaluation\u003c\/li\u003e\n\u003cli\u003eTier: Select\u003c\/li\u003e\n\u003cli\u003ePricing: Per pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eQuestions about matching these to your specific amplifier, or which tier is appropriate for your application? Reach out.\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Single Tube","offer_id":42764458623043,"sku":null,"price":92.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair","offer_id":42764458655811,"sku":null,"price":207.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad","offer_id":42764458688579,"sku":null,"price":449.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0572\/0522\/7587\/files\/Ray-Tubes-Select-12AX7-Tweek-Geek-26831182790723.jpg?v=1779252025"},{"product_id":"ray-tubes-select-12at7","title":"Ray Tubes Select 12AT7","description":"\u003ch1\u003eRay Tubes Select 12AT7\u003c\/h1\u003e\n\n\u003cp\u003e12AT7 dual triode, 9-pin. Medium-gain driver and phase splitter tube. Select tier.\u003c\/p\u003e\n\n\u003ch2\u003eThe Ray Tubes Approach\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes was created specifically for the audiophile and hi-fi market — not repurposed industrial tubes, not rebranded commodity production. They partner with manufacturers to build tubes to audio-specific specifications, then subject every batch to QC that includes both electrical testing and listening evaluation by sound engineers. The Select tier represents the results of that process at an accessible selection standard.\u003c\/p\u003e\n\n\u003ch2\u003ePress Recognition\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes is a newer brand without extensive press coverage yet. Our own evaluation and customer feedback in amplifier applications has been consistently positive — comparable in character to better NOS options at a fraction of the cost.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTube type: 12AT7\u003c\/li\u003e\n\u003cli\u003eProduction: New production to Ray Tubes specifications\u003c\/li\u003e\n\u003cli\u003eQuality control: Electrical testing plus listening evaluation\u003c\/li\u003e\n\u003cli\u003eTier: Select\u003c\/li\u003e\n\u003cli\u003ePricing: Per pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eQuestions about matching these to your specific amplifier, or which tier is appropriate for your application? Reach out.\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Single Tube","offer_id":42764459016259,"sku":null,"price":92.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair","offer_id":42764459049027,"sku":null,"price":207.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad","offer_id":42764459081795,"sku":null,"price":449.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0572\/0522\/7587\/files\/Ray-Tubes-Select-12AT7-Tweek-Geek-26831156248643.jpg?v=1779252010"},{"product_id":"ray-tubes-select-el34","title":"Ray Tubes Select EL34","description":"\u003ch1\u003eRay Tubes Select EL34\u003c\/h1\u003e\n\n\u003cp\u003eEL34 power pentode, introduced by Mullard 1955. Classic British output tube, warm midrange character. Select tier.\u003c\/p\u003e\n\n\u003ch2\u003eThe Ray Tubes Approach\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes was created specifically for the audiophile and hi-fi market — not repurposed industrial tubes, not rebranded commodity production. They partner with manufacturers to build tubes to audio-specific specifications, then subject every batch to QC that includes both electrical testing and listening evaluation by sound engineers. The Select tier represents the results of that process at an accessible selection standard.\u003c\/p\u003e\n\n\u003ch2\u003ePress Recognition\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes is a newer brand without extensive press coverage yet. Our own evaluation and customer feedback in amplifier applications has been consistently positive — comparable in character to better NOS options at a fraction of the cost.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTube type: EL34\u003c\/li\u003e\n\u003cli\u003eProduction: New production to Ray Tubes specifications\u003c\/li\u003e\n\u003cli\u003eQuality control: Electrical testing plus listening evaluation\u003c\/li\u003e\n\u003cli\u003eTier: Select\u003c\/li\u003e\n\u003cli\u003ePricing: Per pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eQuestions about matching these to your specific amplifier, or which tier is appropriate for your application? Reach out.\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Single Tube","offer_id":42774161686595,"sku":null,"price":69.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair","offer_id":42774161719363,"sku":null,"price":161.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad","offer_id":42774161752131,"sku":null,"price":357.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0572\/0522\/7587\/files\/Ray-Tubes-Select-EL34-Tweek-Geek-26831196160067.jpg?v=1779252009"},{"product_id":"ray-tubes-select-5u4","title":"Ray Tubes Select 5U4","description":"\u003ch1\u003eRay Tubes Select 5U4\u003c\/h1\u003e\n\n\u003cp\u003e5U4 full-wave rectifier, twin-diode. Power supply rectifier that influences amplifier character. Select tier.\u003c\/p\u003e\n\n\u003ch2\u003eThe Ray Tubes Approach\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes was created specifically for the audiophile and hi-fi market — not repurposed industrial tubes, not rebranded commodity production. They partner with manufacturers to build tubes to audio-specific specifications, then subject every batch to QC that includes both electrical testing and listening evaluation by sound engineers. The Select tier represents the results of that process at an accessible selection standard.\u003c\/p\u003e\n\n\u003ch2\u003ePress Recognition\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes is a newer brand without extensive press coverage yet. Our own evaluation and customer feedback in amplifier applications has been consistently positive — comparable in character to better NOS options at a fraction of the cost.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTube type: 5U4\u003c\/li\u003e\n\u003cli\u003eProduction: New production to Ray Tubes specifications\u003c\/li\u003e\n\u003cli\u003eQuality control: Electrical testing plus listening evaluation\u003c\/li\u003e\n\u003cli\u003eTier: Select\u003c\/li\u003e\n\u003cli\u003ePricing: Per pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eQuestions about matching these to your specific amplifier, or which tier is appropriate for your application? Reach out.\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Default Title","offer_id":42780555968579,"sku":null,"price":92.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0572\/0522\/7587\/files\/Ray-Tubes-Select-5U4-Tweek-Geek-26843870330947.jpg?v=1779252009"},{"product_id":"ray-tubes-select-300b","title":"Ray Tubes Select 300B","description":"\u003ch1\u003eRay Tubes Select 300B\u003c\/h1\u003e\n\n\u003cp\u003e300B triode, introduced 1938. The benchmark SET output tube. Lush mids, graceful highs, cohesive musical bass. Select tier.\u003c\/p\u003e\n\n\u003ch2\u003eThe Ray Tubes Approach\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes was created specifically for the audiophile and hi-fi market — not repurposed industrial tubes, not rebranded commodity production. They partner with manufacturers to build tubes to audio-specific specifications, then subject every batch to QC that includes both electrical testing and listening evaluation by sound engineers. The Select tier represents the results of that process at an accessible selection standard.\u003c\/p\u003e\n\n\u003ch2\u003ePress Recognition\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes is a newer brand without extensive press coverage yet. Our own evaluation and customer feedback in amplifier applications has been consistently positive — comparable in character to better NOS options at a fraction of the cost.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTube type: 300B\u003c\/li\u003e\n\u003cli\u003eProduction: New production to Ray Tubes specifications\u003c\/li\u003e\n\u003cli\u003eQuality control: Electrical testing plus listening evaluation\u003c\/li\u003e\n\u003cli\u003eTier: Select\u003c\/li\u003e\n\u003cli\u003ePricing: Per pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eQuestions about matching these to your specific amplifier, or which tier is appropriate for your application? Reach out.\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Single Tube","offer_id":42780563406915,"sku":null,"price":228.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair","offer_id":42780563439683,"sku":null,"price":481.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad","offer_id":42780563472451,"sku":null,"price":999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0572\/0522\/7587\/files\/Ray-Tubes-Select-300B-Tweek-Geek-26843936161859.jpg?v=1779252009"},{"product_id":"ray-tubes-select-kt88","title":"Ray Tubes Select KT88","description":"\u003ch1\u003eRay Tubes Select KT88\u003c\/h1\u003e\n\n\u003cp\u003eKT88 beam tetrode, introduced 1956. Output tube for push-pull and triode-wired amplifiers. Select tier.\u003c\/p\u003e\n\n\u003ch2\u003eThe Ray Tubes Approach\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes was created specifically for the audiophile and hi-fi market — not repurposed industrial tubes, not rebranded commodity production. They partner with manufacturers to build tubes to audio-specific specifications, then subject every batch to QC that includes both electrical testing and listening evaluation by sound engineers. The Select tier represents the results of that process at an accessible selection standard.\u003c\/p\u003e\n\n\u003ch2\u003ePress Recognition\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes is a newer brand without extensive press coverage yet. Our own evaluation and customer feedback in amplifier applications has been consistently positive — comparable in character to better NOS options at a fraction of the cost.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTube type: KT88\u003c\/li\u003e\n\u003cli\u003eProduction: New production to Ray Tubes specifications\u003c\/li\u003e\n\u003cli\u003eQuality control: Electrical testing plus listening evaluation\u003c\/li\u003e\n\u003cli\u003eTier: Select\u003c\/li\u003e\n\u003cli\u003ePricing: Per pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eQuestions about matching these to your specific amplifier, or which tier is appropriate for your application? Reach out.\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Single Tube","offer_id":42780568682563,"sku":null,"price":92.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair","offer_id":42780568715331,"sku":null,"price":207.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad","offer_id":42780568748099,"sku":null,"price":449.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0572\/0522\/7587\/files\/Ray-Tubes-Select-KT88-Tweek-Geek-26843950972995.jpg?v=1779252009"},{"product_id":"ray-tubes-select-template-copy","title":"Ray Tubes Select 6SN7","description":"\u003ch1\u003eRay Tubes Select 6SN7\u003c\/h1\u003e\n\n\u003cp\u003e6SN7 dual triode, 8-pin socket. Driver stage tube used in audio since 1939 and in the famous Williamson circuit from 1949. Select tier.\u003c\/p\u003e\n\n\u003ch2\u003eThe Ray Tubes Approach\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes was created specifically for the audiophile and hi-fi market — not repurposed industrial tubes, not rebranded commodity production. They partner with manufacturers to build tubes to audio-specific specifications, then subject every batch to QC that includes both electrical testing and listening evaluation by sound engineers. The Select tier represents the results of that process at an accessible selection standard.\u003c\/p\u003e\n\n\u003ch2\u003ePress Recognition\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes is a newer brand without extensive press coverage yet. Our own evaluation and customer feedback in amplifier applications has been consistently positive — comparable in character to better NOS options at a fraction of the cost.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTube type: 6SN7\u003c\/li\u003e\n\u003cli\u003eProduction: New production to Ray Tubes specifications\u003c\/li\u003e\n\u003cli\u003eQuality control: Electrical testing plus listening evaluation\u003c\/li\u003e\n\u003cli\u003eTier: Select\u003c\/li\u003e\n\u003cli\u003ePricing: Per pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eQuestions about matching these to your specific amplifier, or which tier is appropriate for your application? Reach out.\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Single Tube","offer_id":42780922937411,"sku":null,"price":75.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair","offer_id":42780922970179,"sku":null,"price":173.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad","offer_id":42780923002947,"sku":null,"price":380.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0572\/0522\/7587\/files\/Ray-Tubes-Select-6SN7-Tweek-Geek-26844473000003.jpg?v=1779251992"},{"product_id":"ray-tubes-reserve-6sn7","title":"Ray Tubes Reserve 6SN7","description":"\u003ch1\u003eRay Tubes Reserve 6SN7\u003c\/h1\u003e\n\n\u003cp\u003e6SN7 dual triode, driver stage tube used since 1939. Reserve tier — highest QC selection standard from Ray Tubes' production.\u003c\/p\u003e\n\n\u003ch2\u003eThe Ray Tubes Approach\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes was created specifically for the audiophile and hi-fi market — not repurposed industrial tubes, not rebranded commodity production. They partner with manufacturers to build tubes to audio-specific specifications, then subject every batch to QC that includes both electrical testing and listening evaluation by sound engineers. The Reserve tier represents the results of that process at the highest selection standard.\u003c\/p\u003e\n\n\u003ch2\u003ePress Recognition\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes is a newer brand without extensive press coverage yet. Our own evaluation and customer feedback in amplifier applications has been consistently positive — comparable in character to better NOS options at a fraction of the cost.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTube type: 6SN7\u003c\/li\u003e\n\u003cli\u003eProduction: New production to Ray Tubes specifications\u003c\/li\u003e\n\u003cli\u003eQuality control: Electrical testing plus listening evaluation\u003c\/li\u003e\n\u003cli\u003eTier: Reserve\u003c\/li\u003e\n\u003cli\u003ePricing: Per pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eQuestions about matching these to your specific amplifier, or which tier is appropriate for your application? Reach out.\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Single Tube","offer_id":42782702764099,"sku":null,"price":242.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair","offer_id":42782702796867,"sku":null,"price":552.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad","offer_id":42782702829635,"sku":null,"price":1173.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0572\/0522\/7587\/files\/Ray-Tubes-Reserve-6SN7-Tweek-Geek-26847225184323.jpg?v=1779251992"},{"product_id":"ray-tubes-reserve-300b","title":"Ray Tubes Reserve 300B","description":"\u003ch1\u003eRay Tubes Reserve 300B\u003c\/h1\u003e\n\n\u003cp\u003eThe 300B is one of the most important tubes in the history of audio. Introduced in 1938 for theater sound amplification, it found its way into audiophile systems in the 1990s and has not left. Low noise, good reliability, extraordinary midrange quality — and an unmistakable presentation that listeners either find essential or find too colored, with relatively little middle ground. If you run a SET amplifier, you've already committed to the 300B's character. Getting the best possible new-production version is the right next step.\u003c\/p\u003e\n\n\u003ch2\u003eThe Ray Tubes Approach\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes builds to their own specifications rather than licensing production from existing facilities. QC includes electrical testing and listening evaluation by sound engineers — every batch, not spot checks. The Reserve designation indicates tubes selected from production at the tightest tolerances, with the most consistent measured performance from the batch.\u003c\/p\u003e\n\n\u003ch2\u003eOur Take\u003c\/h2\u003e\n\n\u003cp\u003eWe've evaluated several current new-production 300B options. The Ray Tubes Reserve is among the best we've heard from a new-production perspective — the midrange has the characteristic 300B liquidity without the softness that can make some new-production versions sound sluggish compared to NOS. The bass is more controlled than some alternatives, which matters in amplifiers where the 300B is working hard into a lower impedance load.\u003c\/p\u003e\n\n\u003ch2\u003ePress Recognition\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes is a newer brand. Extensive press coverage doesn't yet exist. Our evaluation and customer feedback in SET amplifier systems — including Sophia Electric and Triode Corporation designs — has been consistently favorable.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eType: 300B triode\u003c\/li\u003e\n\u003cli\u003eApplication: Single-ended triode amplifiers, output stage\u003c\/li\u003e\n\u003cli\u003eProduction: New production to Ray Tubes specifications\u003c\/li\u003e\n\u003cli\u003eQuality control: Electrical testing plus listening evaluation\u003c\/li\u003e\n\u003cli\u003eTier: Reserve\u003c\/li\u003e\n\u003cli\u003ePricing: Per pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eQuestions about 300B selection for your specific amplifier, or comparing Reserve to Select for your application? Reach out.\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Single Tube","offer_id":42782703222851,"sku":null,"price":450.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair","offer_id":42782703255619,"sku":null,"price":960.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad","offer_id":42782703288387,"sku":null,"price":1980.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0572\/0522\/7587\/files\/Ray-Tubes-Reserve-300b-Tweek-Geek-26847224692803.jpg?v=1779251992"},{"product_id":"ray-tubes-reserve-kt88","title":"Ray Tubes Reserve KT88","description":"\u003ch1\u003eRay Tubes Reserve KT88\u003c\/h1\u003e\n\n\u003cp\u003eThe KT88 has been the output tube of choice for high-power push-pull amplifiers since 1956. Its combination of power capability, linearity, and longevity made it the standard for serious audio amplification from its introduction through the present day. New Old Stock KT88 is increasingly scarce and increasingly expensive. Good new-production alternatives matter.\u003c\/p\u003e\n\n\u003ch2\u003eThe Ray Tubes Approach\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes was created specifically to supply the audiophile market with new-production tubes built to audio-specific standards — not repurposed industrial tubes or rebranded commodity production. They partner with manufacturers to build tubes to their own specifications, then subject every batch to a QC process that includes electrical testing and listening evaluation by sound engineers. Not a cursory test. A meaningful one.\u003c\/p\u003e\n\n\u003cp\u003eThe Reserve line represents Ray Tubes' higher-performance tier — selected from production for tighter tolerances and more consistent performance than the Select line.\u003c\/p\u003e\n\n\u003ch2\u003ePress Recognition\u003c\/h2\u003e\n\n\u003cp\u003eRay Tubes is a newer brand without extensive press coverage yet. Our own evaluation of their KT88 and the feedback from customers who have used them in Unison Research, PrimaLuna, and similar amplifiers has been consistently positive — comparable in character to the better NOS options at a fraction of the price.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eType: KT88 beam tetrode\u003c\/li\u003e\n\u003cli\u003eApplication: Output tube, push-pull and triode amplifiers\u003c\/li\u003e\n\u003cli\u003eProduction: New production to Ray Tubes specifications\u003c\/li\u003e\n\u003cli\u003eQuality control: Electrical testing plus listening evaluation\u003c\/li\u003e\n\u003cli\u003eTier: Reserve (higher selection threshold than Select)\u003c\/li\u003e\n\u003cli\u003ePricing: Per pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eQuestions about matching these to your specific amplifier, or comparing Reserve versus Select for your application? Reach out.\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Single Tube","offer_id":42782705385539,"sku":null,"price":230.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair","offer_id":42782705418307,"sku":null,"price":529.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad","offer_id":42782705451075,"sku":null,"price":1127.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0572\/0522\/7587\/files\/Ray-Tubes-Reserve-KT88-Tweek-Geek-26847226888259.jpg?v=1779251992"}],"url":"https:\/\/tweekgeek.com\/collections\/ray-tubes-1.oembed","provider":"Tweek Geek","version":"1.0","type":"link"}