{"product_id":"upgraded-6k4-6a2-tube-preamplifier-amplifiers-hifi-tube-preamp-bile-buffer-auido-amp-speaker-sound-amplifier-home-theater-diy","title":"Upgraded 6K4\/6A2 Tube Preamplifier Amplifiers HiFi Tube Preamp Bile Buffer Auido Amp Speaker Sound Amplifier Home Theater DIY","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eWAPUNO\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eCertification\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eCE,None\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eChannels\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e2 (2.0)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eChoice\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eyes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh-concerned chemical\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNone\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMaximum Power Per Channel\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNO POWER\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eModel Number\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e6K4\/6A2 Tube\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOrigin\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMainland China\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003ePackage\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eYes\u003c\/span\u003e\u003c\/p\u003e\u003cdiv class=\"detailmodule_html\"\u003e\u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cstrong\u003eProduct description:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003e--This product is a tube pre-amplifier and needs to be connected to an active speaker or power amplifier.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003e--It cannot directly connect speakers and passive speakers, headphones, phono amplifiers, cars.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003eProduct name: tube preamplifier\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-size:16px\"\u003eTube: \u003c\/span\u003e\u003cspan style=\"color:rgb(0, 98, 177);font-size:16px\"\u003e6K4\u003c\/span\u003e\u003cspan style=\"font-size:16px\"\u003e\/\u003c\/span\u003e\u003cspan style=\"color:rgb(159, 5, 0);font-size:16px\"\u003e6A2\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003ePower supply: DC12-16V, current 1A or more (DC12V 1.5A supply power is recommended)(without supply power)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003ePower socket: DC3.5\/5.5*2.1\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003eProduct support replace tube: 6J1 6J2 6J3 6J4 6J5 6A2 6K4 6K5 6AK5 6AU6 6BA6 6BD6 EF93 6K7 GE5654 etc.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003ePre-stage magnification: voltage magnification 5 times\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003ePre-stage frequency response: 5HZ-500KHZ\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003ePre-level sensitivity: 3V\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003eAudio input: low-level signal input such as mobile phone, CD, computer, TV, MP3, etc.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003eAudio output: connect to power amplifier or active speakers\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003eSize: 87*75MM\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003e1.The tube preamp is a class A amplification state.. It is recommended to use shielded wire for the signal wire. Common wires may cause leakage or noise.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003e2.The high-fidelity lift can be adjusted freely, and the three-gear adjustment with a wave switch.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003eThe switch on the far left is Hi-Fi\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003eThe switch is in the middle to raise a\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003eThe switch on the far right is the lift two.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003e1. If the signal line is not shielded or the power supply is not well filtered, noise may be generated. It is recommended to use shielded wires and a clean power supply for testing.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:16px\"\u003e2. The tube buffer is amplified by about 5 times. The pre-amp has an amplification function, which is connected between the audio source, the pre-amp and the power amplifier. The noise from the audio source is amplified, so please use a good audio source to test.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:18px\"\u003e\u003cstrong\u003ePackage included:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-size:16px\"\u003e1* 6K4 \/6A2Tube Preampoptional\u003c\/span\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cspan style=\"color:rgb(255, 0, 0)\"\u003e(without supply power)\u003c\/span\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S007e5cbb8f104616b564d3f2b1690f36C.jpg\" slate-data-type=\"image\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sd337675900084fb6bdd62ab2ad7980bel.jpg\" slate-data-type=\"image\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S0ac00a7cf4b549a39d6e9d527621212b8.jpg\" slate-data-type=\"image\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S0e376817fdc04befb85a2f155b8d4b5dP.jpg\" slate-data-type=\"image\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S98a2c9a109bb4af68020b85c86886b29T.jpg\" slate-data-type=\"image\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S55404a60b199476f905123deb854f697K.jpg\" slate-data-type=\"image\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S5e84b2ea3ce94d208661d09849e7c4d36.jpg\" slate-data-type=\"image\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sd968cb41baca4d96adfe22e86652922dU.jpg\" slate-data-type=\"image\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S9fc3560401ee474b9de7fcb0cc7dcbd9m.jpg\" slate-data-type=\"image\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S361c25087d61455cbe08b9e4dd1175453.jpg\" slate-data-type=\"image\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S3a81bdfeb2a04e0b971a1b69ae5b2db25.jpg\" slate-data-type=\"image\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Safc0b076ab7d45c69ddf88310abbe7a2b.jpg\" slate-data-type=\"image\"\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-size:18px\"\u003e\u003cstrong\u003eNew upgrade: DC boost version:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"font-size:16px\"\u003eWorking principle of power supply:\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-size:16px\"\u003eAs soon as the machine is turned on, the electronic tube filament begins to heat up, and at this point, the voltage rises from zero. Once the electronic tube filament heats up, the voltage just rises.\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-size:16px\"\u003eFilament principle:\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-size:16px\"\u003eAn excellent power supply system will prevent current noise. The filament is powered by DC 12V, and the filaments of the two tubes are connected in series. The use of DC filament power supply is also to reduce noise.\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"HHRummurz.com","offers":[{"title":"6A2 tube Pre-amp","offer_id":43522424799310,"sku":"14:350853#6A2 tube Pre-amp","price":84.56,"currency_code":"USD","in_stock":true},{"title":"6K4 tube Pre-amp","offer_id":43522424832078,"sku":"14:193#6K4 tube Pre-amp","price":84.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/9066\/7598\/files\/Sd66eeab040a74bdbabb64446a67bd3fbR.webp?v=1773490431","url":"https:\/\/www.hhrumurz.com\/products\/upgraded-6k4-6a2-tube-preamplifier-amplifiers-hifi-tube-preamp-bile-buffer-auido-amp-speaker-sound-amplifier-home-theater-diy","provider":"HHrumurz.com","version":"1.0","type":"link"}