{"id":140159,"date":"2026-06-10T01:22:32","date_gmt":"2026-06-10T05:22:32","guid":{"rendered":"https:\/\/add-tronique.com\/boutique\/uncategorized\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/"},"modified":"2026-06-10T09:39:43","modified_gmt":"2026-06-10T13:39:43","slug":"fosi-audio-za3-48v-compact-stereo-mono-amplifier","status":"publish","type":"product","link":"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/","title":{"rendered":"Fosi Audio ZA3-48V \u2013 Compact stereo\/mono amplifier"},"content":{"rendered":"

\u26a1 Fosi Audio ZA3-48V \u2013 Compact stereo\/mono amplifier<\/h1>\n

TPA3255 \u2013 RCA \/ XLR \/ TRS \u2013 Sub Out \u2013 48V<\/strong><\/p>\n

\ud83d\udccc Product description<\/h2>\n

The Fosi Audio ZA3-48V is a compact Class-D amplifier based on the Texas Instruments TPA3255 chip, designed to drive passive speakers with excellent power headroom. It operates in either stereo or mono mode, making it highly versatile for a range of audio installation scenarios. <\/p>\n

It accepts RCA, XLR and 1\/4″ TRS inputs, and features a speaker output as well as an active subwoofer output with a low-pass filter. With a 48V power supply, it can deliver up to 155W x 2 in stereo at 4\u03a9 or 235W x 1 in mono at 4\u03a9. <\/p>\n

Key features<\/h2>\n
    \n
  • \n

    Compact Class-D amplifier.<\/p>\n<\/li>\n

  • \n

    Texas Instruments TPA3255 chip.<\/p>\n<\/li>\n

  • \n

    Stereo and mono modes.<\/p>\n<\/li>\n

  • \n

    RCA, XLR and 1\/4″ TRS inputs.<\/p>\n<\/li>\n

  • \n

    Speaker outputs and active subwoofer.<\/p>\n<\/li>\n

  • \n

    Compatible with 2\u03a9 to 8\u03a9.<\/p>\n<\/li>\n

  • \n

    12V trigger input<\/p>\n<\/li>\n

  • \n

    Op-amp swapping is possible.<\/p>\n<\/li>\n<\/ul>\n

    \ud83d\udd27 Technical Specifications<\/h2>\n
      \n
    • \n

      Type: Class-D amplifier.<\/p>\n<\/li>\n

    • \n

      Chipset: Texas Instruments TPA3255.<\/p>\n<\/li>\n

    • \n

      Inputs: RCA, XLR, 1\/4″ TRS.<\/p>\n<\/li>\n

    • \n

      Outputs: Speaker Output, Active Subwoofer Output.<\/p>\n<\/li>\n

    • \n

      Modes: Stereo \/ Mono.<\/p>\n<\/li>\n

    • \n

      Power output: 48V\/5A: 155W x2 @ 4\u03a9 in stereo, 235W x1 @ 4\u03a9 in mono.<\/p>\n<\/li>\n

    • \n

      Power output: 32V\/5A: 95W x2 @ 4\u03a9 in stereo, 110W x1 @ 4\u03a9 in mono.<\/p>\n<\/li>\n

    • \n

      Impedance: 2\u03a9 to 8\u03a9.<\/p>\n<\/li>\n

    • \n

      Frequency response: 20 Hz\u201320 kHz (\u00b10.1 dB).<\/p>\n<\/li>\n

    • \n

      SNR :<\/strong> \u2265106dB.<\/p>\n<\/li>\n

    • \n

      THD :<\/strong> <0.006%.<\/p>\n<\/li>\n

    • \n

      SINAD :<\/strong> 89dB.<\/p>\n<\/li>\n

    • \n

      Power supply: 24V to 48V DC.<\/p>\n<\/li>\n<\/ul>\n

      \ud83c\udfa7 Applications<\/h2>\n
        \n
      • \n

        Setup hi-fi compact.<\/p>\n<\/li>\n

      • \n

        Office or living room.<\/p>\n<\/li>\n

      • \n

        Passive speakers with an impedance of 2\u03a9 to 8\u03a9.<\/p>\n<\/li>\n

      • \n

        Stereo system with active subwoofer.<\/p>\n<\/li>\n

      • \n

        A more powerful mono setup.<\/p>\n<\/li>\n<\/ul>\n

        \ud83d\udcaa Benefits<\/h2>\n
          \n
        • \n

          High power in a compact design.<\/p>\n<\/li>\n

        • \n

          Stereo and mono modes.<\/p>\n<\/li>\n

        • \n

          Balanced and unbalanced inputs.<\/p>\n<\/li>\n

        • \n

          Dedicated subwoofer output.<\/p>\n<\/li>\n

        • \n

          Compatible with a range of audio setups.<\/p>\n<\/li>\n

        • \n

          Option to customise the sound using op-amps.<\/p>\n<\/li>\n<\/ul>\n

          \ud83d\udce6 Box contents<\/h2>\n
            \n
          • \n

            1 \u00d7 Fosi Audio ZA3-48V.<\/p>\n<\/li>\n

          • \n

            1 \u00d7 48V\/5A power supply.<\/p>\n<\/li>\n

          • \n

            1 \u00d7 User manual.<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

            \u26a1 Fosi Audio ZA3-48V \u2013 Compact stereo\/mono amplifier TPA3255 \u2013 RCA \/ XLR \/ TRS \u2013 Sub Out \u2013 48V \ud83d\udccc Product description The Fosi Audio ZA3-48V is a compact Class-D amplifier based on the Texas Instruments TPA3255 chip, designed to drive passive speakers with excellent power headroom. It operates in either stereo or mono […]<\/p>\n","protected":false},"featured_media":140149,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[13403,11342,27835],"product_tag":[27862,27859,27858,14165,11692,27857,27861,27860,22241,12337],"class_list":{"0":"post-140159","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-amplifiers","7":"product_cat-audio-audio-and-accessories","8":"product_cat-fosi-audio","9":"product_tag-48v","10":"product_tag-class-d-amplifier-2","11":"product_tag-fosi-audio-za3-48v","12":"product_tag-mono-amplifier","13":"product_tag-rca-en","14":"product_tag-stereo-amplifier-2","15":"product_tag-sub-out","16":"product_tag-tpa3255","17":"product_tag-trs-en","18":"product_tag-xlr-en","20":"first","21":"instock","22":"taxable","23":"shipping-taxable","24":"purchasable","25":"product-type-simple"},"bundled_by":[],"bundle_stock_status":"instock","bundle_stock_quantity":3,"bundle_virtual":false,"bundle_layout":"","bundle_add_to_cart_form_location":"","bundle_editable_in_cart":false,"bundle_sold_individually_context":"","bundle_item_grouping":"","bundle_min_size":"","bundle_max_size":"","bundle_price":[],"bundled_items":[],"bundle_sell_ids":[],"yoast_head":"\nFosi Audio ZA3-48V \u2013 Compact stereo\/mono amplifier - Add-Tronique<\/title>\n<meta name=\"description\" content=\"Fosi Audio ZA3-48V: compact TPA3255 Class-D amplifier with RCA, XLR, TRS, sub out, stereo\/mono mode and 48V power supply.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fosi Audio ZA3-48V \u2013 Compact stereo\/mono amplifier - Add-Tronique\" \/>\n<meta property=\"og:description\" content=\"Fosi Audio ZA3-48V: compact TPA3255 Class-D amplifier with RCA, XLR, TRS, sub out, stereo\/mono mode and 48V power supply.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/\" \/>\n<meta property=\"og:site_name\" content=\"Add-Tronique\" \/>\n<meta property=\"article:modified_time\" content=\"2026-06-10T13:39:43+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/add-tronique.com\/wp-content\/uploads\/2026\/06\/ZA3_a9210344-fd70-4617-a836-ea3aa22bdbaf.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1600\" \/>\n\t<meta property=\"og:image:height\" content=\"1600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/\",\"url\":\"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/\",\"name\":\"Fosi Audio ZA3-48V \u2013 Compact stereo\/mono amplifier - Add-Tronique\",\"isPartOf\":{\"@id\":\"https:\/\/add-tronique.com\/en\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/add-tronique.com\/wp-content\/uploads\/2026\/06\/ZA3_a9210344-fd70-4617-a836-ea3aa22bdbaf.webp\",\"datePublished\":\"2026-06-10T05:22:32+00:00\",\"dateModified\":\"2026-06-10T13:39:43+00:00\",\"description\":\"Fosi Audio ZA3-48V: compact TPA3255 Class-D amplifier with RCA, XLR, TRS, sub out, stereo\/mono mode and 48V power supply.\",\"breadcrumb\":{\"@id\":\"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/#primaryimage\",\"url\":\"https:\/\/add-tronique.com\/wp-content\/uploads\/2026\/06\/ZA3_a9210344-fd70-4617-a836-ea3aa22bdbaf.webp\",\"contentUrl\":\"https:\/\/add-tronique.com\/wp-content\/uploads\/2026\/06\/ZA3_a9210344-fd70-4617-a836-ea3aa22bdbaf.webp\",\"width\":1600,\"height\":1600,\"caption\":\"Fosi Audio ZA3-48V: compact TPA3255 Class-D amplifier with RCA, XLR, TRS, sub out, stereo\/mono mode and 48V power supply.\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Shop\",\"item\":\"https:\/\/add-tronique.com\/en\/shop\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Fosi Audio ZA3-48V \u2013 Compact stereo\/mono amplifier\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/add-tronique.com\/en\/#website\",\"url\":\"https:\/\/add-tronique.com\/en\/\",\"name\":\"Add-Tronique\",\"description\":\"Un site utilisant WordPress\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/add-tronique.com\/en\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Fosi Audio ZA3-48V \u2013 Compact stereo\/mono amplifier - Add-Tronique","description":"Fosi Audio ZA3-48V: compact TPA3255 Class-D amplifier with RCA, XLR, TRS, sub out, stereo\/mono mode and 48V power supply.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/","og_locale":"en_US","og_type":"article","og_title":"Fosi Audio ZA3-48V \u2013 Compact stereo\/mono amplifier - Add-Tronique","og_description":"Fosi Audio ZA3-48V: compact TPA3255 Class-D amplifier with RCA, XLR, TRS, sub out, stereo\/mono mode and 48V power supply.","og_url":"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/","og_site_name":"Add-Tronique","article_modified_time":"2026-06-10T13:39:43+00:00","og_image":[{"width":1600,"height":1600,"url":"https:\/\/add-tronique.com\/wp-content\/uploads\/2026\/06\/ZA3_a9210344-fd70-4617-a836-ea3aa22bdbaf.webp","type":"image\/webp"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/","url":"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/","name":"Fosi Audio ZA3-48V \u2013 Compact stereo\/mono amplifier - Add-Tronique","isPartOf":{"@id":"https:\/\/add-tronique.com\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/#primaryimage"},"image":{"@id":"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/#primaryimage"},"thumbnailUrl":"https:\/\/add-tronique.com\/wp-content\/uploads\/2026\/06\/ZA3_a9210344-fd70-4617-a836-ea3aa22bdbaf.webp","datePublished":"2026-06-10T05:22:32+00:00","dateModified":"2026-06-10T13:39:43+00:00","description":"Fosi Audio ZA3-48V: compact TPA3255 Class-D amplifier with RCA, XLR, TRS, sub out, stereo\/mono mode and 48V power supply.","breadcrumb":{"@id":"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/#primaryimage","url":"https:\/\/add-tronique.com\/wp-content\/uploads\/2026\/06\/ZA3_a9210344-fd70-4617-a836-ea3aa22bdbaf.webp","contentUrl":"https:\/\/add-tronique.com\/wp-content\/uploads\/2026\/06\/ZA3_a9210344-fd70-4617-a836-ea3aa22bdbaf.webp","width":1600,"height":1600,"caption":"Fosi Audio ZA3-48V: compact TPA3255 Class-D amplifier with RCA, XLR, TRS, sub out, stereo\/mono mode and 48V power supply."},{"@type":"BreadcrumbList","@id":"https:\/\/add-tronique.com\/en\/boutique\/audio-audio-and-accessories\/amplifiers\/fosi-audio-za3-48v-compact-stereo-mono-amplifier\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Shop","item":"https:\/\/add-tronique.com\/en\/shop\/"},{"@type":"ListItem","position":2,"name":"Fosi Audio ZA3-48V \u2013 Compact stereo\/mono amplifier"}]},{"@type":"WebSite","@id":"https:\/\/add-tronique.com\/en\/#website","url":"https:\/\/add-tronique.com\/en\/","name":"Add-Tronique","description":"Un site utilisant WordPress","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/add-tronique.com\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/add-tronique.com\/en\/wp-json\/wp\/v2\/product\/140159","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/add-tronique.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/add-tronique.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/add-tronique.com\/en\/wp-json\/wp\/v2\/comments?post=140159"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/add-tronique.com\/en\/wp-json\/wp\/v2\/media\/140149"}],"wp:attachment":[{"href":"https:\/\/add-tronique.com\/en\/wp-json\/wp\/v2\/media?parent=140159"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/add-tronique.com\/en\/wp-json\/wp\/v2\/product_brand?post=140159"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/add-tronique.com\/en\/wp-json\/wp\/v2\/product_cat?post=140159"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/add-tronique.com\/en\/wp-json\/wp\/v2\/product_tag?post=140159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}