{"product_id":"b4-x-portable-vacuum-tube-headphone-amplifier-dual-mono-balanced-stereo-eu-plug","title":"B4-X Portable Vacuum Tube Headphone Amplifier - Dual-Mono Balanced Stereo, EU Plug","description":"\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp class=\"detail-desc-decorate-content\"\u003e1. Mini size and unique design: built-in tube makes you have a tube amplifier which can be held by one hand, convenient to carry and can enjoy HiFi music everywhere.\u003cbr\u003e\u003cbr\u003e3. Full, delicate and soft sound: warmer than transistors, independent op amp and power supply inhance the SNR and degree of separation, less interplay and higher sound quality.\u003cbr\u003e4. High-end making material and craft: using gold-plated socket, electrolytic capacitor, and precision ring resistance.\u003cbr\u003e\u003cbr\u003eThe difference between B4 and B4-X\u003cbr\u003e1. B4-X is a dual-mono balanced version. Its left and right channel are amplified by independent components, and power supply, tubes, and op amp are all independent and symmetric. So the degree of sound separation is higher than B4.\u003cbr\u003e2. B4-X adopts 2 groups of independent power supply(+12V and -12V) for 2 op amps, less mutual effects and can drive 300Ω headphones.\u003cbr\u003e3. The circuit adopts dual op amp parallel output, with higher output power.\u003cbr\u003e4. B4-X has 3.5mm and 2.5mm 2 kinds of output interface, suitable for most of balanced and standard headphones.\u003cbr\u003eTube: RAYTHEON JAN5899 x2\u003cbr\u003eLithium Battery: 12V, 1000mA\u003cbr\u003eCharging time: 2-2.5 hours\u003cbr\u003eWorking time: 4-4.5 hours\u003cbr\u003eOutput power: 450mW\u003cbr\u003eVoltage: AC100-240V\u003cbr\u003eSNR: 105dB\u003cbr\u003eColour: Black\u003cbr\u003ematerial: metal\u003cbr\u003e\u003cbr\u003eOutput: 2.5 balanced Jack x 1, 3.5mm Jack x 1\u003cbr\u003eSize: 115 x 69 x 23 mm (LxWxD) (does not include the knob)\u003cbr\u003ePlug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on\u003cbr\u003e\u003cbr\u003ePackage Contents:\u003cbr\u003e1x headphone amplifier\u003cbr\u003e1x power supply\u003cbr\u003e1x 3.5mm audio cable(The style and color of the audio cable are randomly issued Do not accept designation)\u003cbr\u003e2x coils (coil color random Do not accept designation)\u003cbr\u003e\u003cbr\u003eOnly the above package content, other products are not included.\u003cbr\u003eNote: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_image\"\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"http:\/\/luckyretail.com\/Uploadfile\/20222\/111\/202211211\/I500329362\/I500329362-4f.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_image\"\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"http:\/\/luckyretail.com\/Uploadfile\/20222\/111\/202211211\/I500329362\/I500329362-3f.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_image\"\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"http:\/\/luckyretail.com\/Uploadfile\/20222\/111\/202211211\/I500329362\/I500329362-5f.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_image\"\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"http:\/\/luckyretail.com\/Uploadfile\/20222\/111\/202211211\/I500329362\/I500329362-2f.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_image\"\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"http:\/\/luckyretail.com\/Uploadfile\/20222\/111\/202211211\/I500329362\/I500329362-1z.jpg\"\u003e\u003c\/div\u003e","brand":"mickcara","offers":[{"title":"1111","offer_id":42948072800393,"sku":"736534-1-","price":169.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0365\/2131\/2393\/files\/c3439846bae6ecffdf7870585a284a6f.jpg?v=1725325884","url":"https:\/\/mickcara.com\/fr\/products\/b4-x-portable-vacuum-tube-headphone-amplifier-dual-mono-balanced-stereo-eu-plug","provider":"mickcara","version":"1.0","type":"link"}