{"product_id":"best-pair-2-cv4003-12au7-6189-mullard-uk-nos-1978-rebranded-6189-rtc-1981-8-4-9-0ma-and-8-4-9-0ma-1-3-matched","title":"(!!!!) (Best Pair #2) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded \"6189 RTC\" 1981 (8.4\/9.0ma and 8.4\/9.0ma) 1-3% matched","description":"\u003cp\u003e1 very low noise pair) CV4003=M8136=12AU7=6189 Mullard UK box plates NOS 1978 rebranded \"6189 RTC\" 1981 in white boxes (RTC=Radiotechnique, France)\u003c\/p\u003e\n\u003cp\u003e1 section) 8.4\/9.0ma Gm=2000\/2100\u003c\/p\u003e\n\u003cp\u003e1 section) 8.4\/9.0ma Gm=1900\/2000\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTested on Amplitrex\u003c\/p\u003e\n\u003cp\u003eGood Ma range 8-10ma\u003c\/p\u003e\n\u003cp\u003eGood Gm range 1800-2200\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003egreat midrange and good bass \u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003eLow Noise and zero microphonics\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e  \u003cbr\u003e\u003c\/p\u003e\n\u003ch1\u003eRecommended for\u003c\/h1\u003e\n\u003cp\u003e- Concert Fidelity CF-080LS Hybrid Line Stage Preamplifier\u003c\/p\u003e\n\u003cp\u003e- Ampeg SVP-PRO Bass Preamp\u003c\/p\u003e\n\u003cp\u003e- Velleman K4000 kit\u003c\/p\u003e\n\u003cp\u003e- Audio Note CD2\u003c\/p\u003e\n\u003cp\u003e- ROTH AUDIO MC4 MUSIC COCOON 2009\u003c\/p\u003e\n\u003cp\u003e- Eastern Electric Minimax\u003c\/p\u003e\n\u003cp\u003e- Hovland\u003c\/p\u003e\n\u003cp\u003e- Schiit Vali 2\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded \"6189 RT\" 1981","offer_id":50915203383548,"sku":"CV4003mull","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_2df58a9a-25e9-498f-adc6-b5a0092f885b.jpg?v=1684102277","url":"https:\/\/tubeworldexpress.com\/products\/best-pair-2-cv4003-12au7-6189-mullard-uk-nos-1978-rebranded-6189-rtc-1981-8-4-9-0ma-and-8-4-9-0ma-1-3-matched","provider":"Tube World Express","version":"1.0","type":"link"}