{"product_id":"tube-usb-decoding-ear-daring-preamp-machine-hifi-audio-amplifier-preamplifier","title":"Tube USB Decoding Ear Daring Preamp Machine Hi-Fi Audio Amplifier Preamplifier","description":"Features:\u003cbr\u003e\nThe original 6J9 tube is used, and the USB decoding uses PCM2706. \u003cbr\u003e\nThe main filter capacitor adopts the original imported electrolytic capacitor, and the coupling capacitor adopts the imported Weimar capacitor 3.9UF. \u003cbr\u003e\nThe resistance uses five-ring 1% metal resistance to ensure a good signal-to-noise ratio of the whole machine. \u003cbr\u003e\nPCB adopts a 1.6mm thick double-sided board, 2.0 oz copper thickness, and a full tinning process to ensure the good passing performance of large and small currents. First-class PCB quality. \u003cbr\u003e\nThe input and output adopt a gold-plated RCA lotus seat, which is durable and beautiful. \u003cbr\u003e\nThis board has reasonable wiring, a beautiful appearance and low current noise. \u003cbr\u003e\nPower supply:DC12V2A (direct current); \u003cbr\u003e\nNet weight:0.2KG; \u003cbr\u003e\nSize:length 120*width 74.5*height 34MM (excluding tube height); \u003cbr\u003e\n  \u003cbr\u003e\nTips:\u003cbr\u003e\n1. This finished machine is a pre-amplifier, not a power amplifier, it should be used with a post-amp or active speaker. Don't directly connect passive speakers, speakers, earphones as power amplifiers; it can't be used in cars, because the car's voltage is unstable and it will burn out. \u003cbr\u003e\n2. In general, poor audio cables or power supply filters have a very high probability of causing noise at the bottom of the current. It is recommended to use a good audio cable or power supply. \u003cbr\u003e\n3. Make sure that there is no problem with your sound source. The preamplifier itself has a preamplifier function. If the sound source itself is noisy, the preamplifier will only amplify the noise. Please use a good sound source to test. \u003cbr\u003e\n4. Check whether the electron tube is properly inserted into the base, please insert the electron tube into the base, and be sure to insert the electron tube properly when the power is off. \u003cbr\u003e\n  \u003cbr\u003e\nPackage Included:     \u003cbr\u003e\n1 x Amplifier","brand":"GreenZech","offers":[{"title":"Black","offer_id":42813879058602,"sku":"MD-00043-BLCK-01","price":68.1,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0280\/6179\/4375\/products\/6ba25ba4-aa35-4a8a-b62a-7b3270b64c1b.jpg?v=1649661331","url":"https:\/\/greenzech.com\/products\/tube-usb-decoding-ear-daring-preamp-machine-hifi-audio-amplifier-preamplifier","provider":"GreenZech","version":"1.0","type":"link"}