{"product_id":"mullard-new-production-cv4004-12ax7","title":"Mullard New Production CV4004 \/ 12AX7","description":"\u003cp\u003e\u003cstrong\u003eMullard CV4004 \/ 12AX7\u003c\/strong\u003e - Price of NOS 12AX7s got you down? This new re-issue of the famous Mullard CV4004 made in Russia is the answer to your woes! This is a short plate version of New Sensor's excellent Mullard 12AX7.  Very low noise and microphony make this tube an excellent candidate for many touchy preamps and phonostage applications. By all reports, these are even quieter than the long plates, so if you have a difficult circuit, this tube may be your solution.\u003c\/p\u003e\u003cp\u003eLike it's long plate brother, the CV4004 has a smooth midrange. Some folks have reported them to be a smidge relaxed on top. If you want something with a little more lively presentation, try the new production \u003cstrong\u003eTung-Sol 12AX7.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cem\u003e\u003cstrong\u003eA quick note on this tube:\u003c\/strong\u003e\u003c\/em\u003e The filaments on these tubes are almost completely encased in the plate structure. So if you don't see them glowing as bright as some of your other 12AX7s... don't sweat it. It's normal for this tube.\u003c\/p\u003e\u003cp\u003eThis tube tested extremely low in noise and microphonics across the board, so we do not have any Driver Grade.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePlatinum grade -\u003c\/strong\u003e The best of the best. Lowest noise and microphony with the tightest triode balance we have available. This is typically 10% or tighter, but may be higher depending on available stock.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGold grade -\u003c\/strong\u003e Low noise and microphonics with a triode balance typically between 15% and 20%, but may be higher depending on available stock.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDriver\/Buffer grade -\u003c\/strong\u003e Lowest noise but not the lowest in microphony. Triode balance will be similar to Gold grade.\u003cbr\u003e\u003cem\u003eThis grade is only suitable for use in the driver stage of an amplifier, or the output\/buffer stage of a DAC or CD Player.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIf you have a preamp or phonostage, you need at least Gold grade.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/grading-and-matching-small-signal-tubes\" target=\"_blank\"\u003e\u003cstrong\u003eClick here for a more in depth discussion on how we grade tubes.\u003cbr\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Mullard","offers":[{"title":"Platinum Grade \/ No Cryo","offer_id":21831306629,"sku":"MULLARDNS CV4004 P","price":46.95,"currency_code":"USD","in_stock":true},{"title":"Platinum Grade \/ Yes Cryo","offer_id":21831306565,"sku":"MULLARDNS CV4004 P C","price":54.95,"currency_code":"USD","in_stock":true},{"title":"Gold Grade \/ No Cryo","offer_id":41659670397112,"sku":"MULLARDNS CV4004 G","price":36.95,"currency_code":"USD","in_stock":true},{"title":"Gold Grade \/ Yes Cryo","offer_id":41659670429880,"sku":"MULLARDNS CV4004 G C","price":44.95,"currency_code":"USD","in_stock":true},{"title":"Kevin's Stash \/ No Cryo","offer_id":29530419429436,"sku":"MULLARDNS CV4004 KS","price":56.95,"currency_code":"USD","in_stock":true},{"title":"Kevin's Stash \/ Yes Cryo","offer_id":29530419462204,"sku":"MULLARDNS CV4004 KS C","price":64.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/products\/17f1164adb746827e880226caf45354c.jpg?v=1741632490","url":"https:\/\/upscaleaudio.pro\/products\/mullard-new-production-cv4004-12ax7","provider":"Upscale Audio","version":"1.0","type":"link"}