{"product_id":"used-open-box-matrix-audio-na-1-headphone-amplifier","title":"Matrix Audio NA-1 Used \/ Open-Box Headphone Amplifier","description":"\u003ch2\u003eProduct overview\u003c\/h2\u003e\n\u003cp\u003eThe Matrix Audio NA-1 is a desktop Class A headphone amplifier and preamp for flagship headphones, power amplifiers, and active speaker systems. This used \/ open-box private quote page helps HiFiLoop confirm the right unit and configuration before quotation.\u003c\/p\u003e\n\u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFully discrete pure Class A circuit design with fully balanced architecture.\u003c\/li\u003e\n\u003cli\u003eFour independent amplification units for balanced signal handling.\u003c\/li\u003e\n\u003cli\u003eIndependent dual-gain control for both headphone output and preamp output.\u003c\/li\u003e\n\u003cli\u003eHeadphone outputs include 6.35 mm single-ended, 4.4 mm balanced, and 4-pin XLR balanced connections.\u003c\/li\u003e\n\u003cli\u003ePreamp outputs include XLR and RCA for connection to a power amplifier or active speakers.\u003c\/li\u003e\n\u003cli\u003eMotor-driven ALPS Type 27 quad-unit potentiometer with IR remote volume control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eMatrix Audio NA-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct category\u003c\/th\u003e\n\u003ctd\u003eHeadphone amplifier \/ preamplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAnalog inputs\u003c\/th\u003e\n\u003ctd\u003e1 balanced input and 2 single-ended inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphone output power\u003c\/th\u003e\n\u003ctd\u003eBalanced: 18 W @ 33 Ω, 4.5 W @ 300 Ω, 2.3 W @ 600 Ω; single-ended: 7 W @ 33 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphone output impedance\u003c\/th\u003e\n\u003ctd\u003e\u0026lt; 1 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePre out THD+N\u003c\/th\u003e\n\u003ctd\u003e\u0026lt; 0.0003% @ 20 Hz-20 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e330 × 275 × 97 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e6.16 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eSeries \/ category notes\u003c\/h2\u003e\n\u003cp\u003eNA-1 is part of the Matrix Audio N Series desktop separates system with NT-1 and ND-1.\u003c\/p\u003e\n\u003ch2\u003eCondition \u0026amp; availability\u003c\/h2\u003e\n\u003cp\u003eThis is a used \/ open-box reference listing.\u003c\/p\u003e\n\u003cp\u003eFinal pricing, condition, accessories, and availability are confirmed case by case.\u003c\/p\u003e\n\u003ch2\u003eShipping \u0026amp; support\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e3-5 business days processing after confirmation\u003c\/li\u003e\n\u003cli\u003e7-15 days typical international shipping\u003c\/li\u003e\n\u003cli\u003eFree shipping over $199\u003c\/li\u003e\n\u003cli\u003e14-day DOA support\u003c\/li\u003e\n\u003cli\u003eRepair path from day 15 to day 180\u003c\/li\u003e\n\u003cli\u003eBuyer may be responsible for return shipping, taxes, and duties\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eWhat does this Reference Listing mean?\u003c\/h3\u003e\n\u003cp\u003eIt is a private quote page for a used or open-box unit. HiFiLoop confirms the final unit details before quotation.\u003c\/p\u003e\n\u003ch3\u003eIs this exact unit ready to ship?\u003c\/h3\u003e\n\u003cp\u003eNot automatically. Each unit is checked case by case before a quote is confirmed.\u003c\/p\u003e\n\u003ch3\u003eCan HiFiLoop help me find another unit?\u003c\/h3\u003e\n\u003cp\u003eYes. Send your target model, destination country, condition preference, and any version or accessory requirements.\u003c\/p\u003e","brand":"Matrix Audio","offers":[{"title":"Default Title","offer_id":48350854545622,"sku":null,"price":1779.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/7445\/9862\/files\/1_1__1_211d7963-c64c-479d-87f2-0bf83d4d2666.png?v=1781167840","url":"https:\/\/www.hifiloop.com\/ja\/products\/used-open-box-matrix-audio-na-1-headphone-amplifier","provider":"HiFiLoop","version":"1.0","type":"link"}