{"title":"CORE","description":null,"products":[{"product_id":"ray-tubes-core-12au7-copy-1","title":"Ray Tubes CORE 12AU7","description":"\u003ch2\u003eCORE 12AU7\u003c\/h2\u003e\n\u003cp\u003eIntroduced in 1946, the 12AU7 was the world's first noval (nine-pin) vacuum tube. The 12AU7 is a double triode, consisting of two 6C4 tubes in a single envelope. Before the advent of solid-state electronics, it was valued for its versatility and portability. Nowadays, you'll find it in the pre-amp phase of tube amplifiers, where it functions as a phase inverter or driver.\u003c\/p\u003e\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cp\u003eCORE is the Ray Tubes entry tier. Built new for audio, measured, matched, and covered by the Ray Tubes One Year Warranty.\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 specifically for use in audio applications\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 CORE 12AU7 provides a clear and natural sound, with a midrange built for warmth and smoothness in compact systems.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe bass is mild and balanced, well-suited for light music and medium-small dynamic audio.\u003c\/li\u003e\n\u003cli\u003eThe midrange frequencies are clear, natural, and warm. Female vocals are particularly vibrant.\u003c\/li\u003e\n\u003cli\u003eThe treble performance is detailed and non-fatiguing, good for extended listening sessions.\u003c\/li\u003e\n\u003cli\u003eThe dynamics are well balanced and the soundstage is of medium size with good positioning, making it ideal for compact audio systems.\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-CO-12AU7-X1 ) or matched pair\u003cbr\u003e( RT-CO-12AU7-X2 )\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":"Single (1 tube)","offer_id":47539150717012,"sku":null,"price":29.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 tubes)","offer_id":47539150749780,"sku":null,"price":69.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/7321\/3524\/files\/CORE12AU7-01.jpg?v=1787334174"},{"product_id":"ray-tubes-core-12ax7-copy","title":"Ray Tubes CORE 12AX7","description":"\u003ch2\u003eCORE 12AX7\u003c\/h2\u003e\n\u003cp\u003eThe 12AX7 vacuum tube was introduced in 1947 as a replacement for the earlier 6SL7 family of dual triodes, all of which were used extensively in audio applications. As one of a handful of small signal tubes that have remained in production since their first use, the 12AX7 is commonly found in the pre-amp stage of tube amplifiers and is especially associated with the emerging electric guitar sound of the 1950s.\u003c\/p\u003e\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cp\u003eCORE is the Ray Tubes entry tier. Built new for audio, measured, matched, and covered by the Ray Tubes One Year Warranty.\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 specifically for use in audio applications\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 CORE 12AX7 delivers a clear and natural sound profile, detailed and expressive through the vocal range.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe bass has an emphasis on clarity over depth, suited for music with a well-defined bass and less emphasis on the heavy low-end.\u003c\/li\u003e\n\u003cli\u003eThe midrange frequencies offer excellent reproduction of vocals, especially female voices, with clear and prominent detail.\u003c\/li\u003e\n\u003cli\u003eThe treble performance is clear without being overly prominent and remains fatigue-free over long listening sessions.\u003c\/li\u003e\n\u003cli\u003eThe dynamics are well balanced, particularly for small to medium shifts. The soundstage offers clear positioning of instruments and is ideal for small to medium-sized systems.\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-CO-12AX7-X1 ) or matched pair\u003cbr\u003e( RT-CO-12AX7-X2 )\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":"Single (1 tube)","offer_id":47539151241300,"sku":null,"price":29.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 tubes)","offer_id":47539151274068,"sku":null,"price":69.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/7321\/3524\/files\/CORE12AX7-01.jpg?v=1787334602"},{"product_id":"ray-tubes-core-12at7-copy","title":"Ray Tubes CORE 12AT7","description":"\u003ch2\u003eCORE 12AT7\u003c\/h2\u003e\n\u003cp\u003eThe 12AT7 is part of a large family of dual triodes that also includes the common 12AX7 and 12AU7 tubes. Its higher gain and transconductance made it suitable for high frequency applications in devices like TVs and FM radios. In the world of audio, it's commonly used as a driver or phase inverter in push-pull audio circuits. Both of its common cousins are already available in the CORE tier, and now Ray Tubes is completing the set with the CORE 12AT7.\u003c\/p\u003e\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cp\u003eCORE is the Ray Tubes entry tier. Built new for audio, measured, matched, and covered by the Ray Tubes One Year Warranty.\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 specifically for use in audio applications\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 CORE 12AT7 delivers a clear and energetic sound character, articulate in the mid-to-high frequencies and precise with rhythm.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe bass is restrained, prioritizing clarity and a well-defined\u003cbr\u003estructure.\u003c\/li\u003e\n\u003cli\u003eThe midrange frequencies are linear and open, excelling with vocals and acoustic instruments.\u003c\/li\u003e\n\u003cli\u003eThe treble performance is crisp and energetic, staying clean and controlled without introducing harshness.\u003c\/li\u003e\n\u003cli\u003eThe dynamics are responsive with smooth transitions, while the soundstage offers good positioning and layering of notes.\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-CO-12AT7-X1) or matched pair (RT-CO-\u003cbr\u003e12AT7-X2)\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":"Single (1 tube)","offer_id":47539152912468,"sku":null,"price":29.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 tubes)","offer_id":47539152945236,"sku":null,"price":69.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/7321\/3524\/files\/CORE12AT7-01.jpg?v=1787334985"},{"product_id":"ray-tubes-core-el84","title":"Ray Tubes CORE EL84","description":"\u003ch2\u003eCORE EL84\u003c\/h2\u003e\n\u003cp\u003eThe EL84 is a power pentode vacuum tube introduced in 1953. Its original purpose was to eliminate the need for a separate driver tube in cheap radio equipment, but it quickly found a place in music history as a component in guitar amps like the legendary Vox AC30, favored by The Beatles, The Rolling Stones, Queen, and countless other bands.\u003c\/p\u003e\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cp\u003eCORE is the Ray Tubes entry tier. Built new for audio, measured, matched, and covered by the Ray Tubes One Year Warranty.\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 specifically for use in audio applications\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 CORE EL84 offers a natural, clean sound with strong vocal clarity and tonal balance. It pairs well with a variety of low- to mid-power systems.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe bass is tight, with a clean and punchy response. Good for genres like pop and light rock.\u003c\/li\u003e\n\u003cli\u003eThe midrange frequencies are smooth and warm, bringing out the charm in small ensemble instruments and vocals, especially female vocals.\u003c\/li\u003e\n\u003cli\u003eThe treble performance is detailed and non-fatiguing, making it smooth and easy on the ears over longer listening sessions.\u003c\/li\u003e\n\u003cli\u003eThe dynamics are a good fit for simpler arrangements, while the soundstage is focused and precise.\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-CO-EL84-X1 ) or matched pair\u003cbr\u003e( RT-CO-EL84-X2 )\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":"Single (1 tube)","offer_id":47539153502292,"sku":null,"price":44.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 tubes)","offer_id":47539153535060,"sku":null,"price":99.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 tubes)","offer_id":47539153567828,"sku":null,"price":224.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/7321\/3524\/files\/COREEL84-01.jpg?v=1787335619"}],"url":"https:\/\/prospercables.com\/collections\/core.oembed","provider":"Prosper Cables ","version":"1.0","type":"link"}