{"product_id":"xduoo-mt-603","title":"xDuoo MT-603 Tube Buffer Preamp — 12AU7, 4-Input Switcher, RCA Out","description":"\u003cp class=\"tp-summary\"\u003eThe xDuoo MT-603 is a compact tube buffer and source switcher that routes four analog inputs, three RCA pairs and a front 3.5mm jack, through a 12AU7 tube to one RCA output at 0dB gain. It suits listeners whose amplifier or powered speakers are short on inputs and who want a tube stage in the chain.\u003c\/p\u003e\n\u003ch2\u003eWho the xDuoo MT-603 is for\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmps short on inputs:\u003c\/strong\u003e Four front push buttons select AUX1 to AUX4, so up to four sources share a single input on your amplifier or powered speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdding a tube stage:\u003c\/strong\u003e The selected source runs through a 12AU7 tube buffer at 0dB gain, so the tube joins the chain without raising the signal level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhones and portable players:\u003c\/strong\u003e AUX4 is a front-panel 3.5mm jack for a phone, laptop or portable player, next to three RCA inputs on the back.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact racks and desks:\u003c\/strong\u003e The aluminum chassis measures 12 × 7.8 × 4cm, uses gold-plated RCA jacks and runs from a 12V\/2A DC supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSkip it if:\u003c\/strong\u003e you need volume control, a headphone jack or a DAC; the MT-603 has none of these, so volume stays on your amplifier and digital sources need their own DAC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003exDuoo MT-603 key specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube:\u003c\/strong\u003e 1 × 12AU7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e 4 analog: 3 × RCA (rear), 1 × 3.5mm (front, AUX4)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e 1 × RCA (rear)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControls:\u003c\/strong\u003e Power switch; four input-select push buttons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGain:\u003c\/strong\u003e 0dB; no volume control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 10Hz–40kHz (±0.5dB); THD ≤0.01%; 100dB SNR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e DC 12V\/2A, external adapter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuild:\u003c\/strong\u003e Aluminum alloy chassis with sandblasted panel; gold-plated RCA jacks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize and weight:\u003c\/strong\u003e 12 × 7.8 × 4cm; 0.36kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"tp-trust\"\u003eGenuine xDuoo stock. Free shipping on every order, 45-day returns.\u003c\/p\u003e","brand":"xDuoo","offers":[{"title":"Default Title","offer_id":46347729862791,"sku":"XDUOO MT-603","price":98.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0756\/5833\/0247\/files\/12528662862.jpg?v=1793197441","url":"https:\/\/tonepier.com\/products\/xduoo-mt-603","provider":"TonePier","version":"1.0","type":"link"}