{"id":547,"date":"2021-07-22T16:11:22","date_gmt":"2021-07-22T08:11:22","guid":{"rendered":"https:\/\/www.speeddragon.com\/?post_type=product&#038;p=547"},"modified":"2021-07-22T16:12:10","modified_gmt":"2021-07-22T08:12:10","slug":"s21c","status":"publish","type":"product","link":"https:\/\/www.speeddragon.com\/product\/s21c\/","title":{"rendered":"S21C &#8211; Stereo Tri Tone Control Pre-Amp and Headphone Amplifier with battery built-in"},"content":{"rendered":"<p>Specifications:<\/p>\n<ul>\n<li>Input:3.5mm Line-In 1 &#8211; To stereo audio source3.5mm Line-In 2 &#8211; To stereo audio sourceUSB Power (Micro USB 5V input)<\/li>\n<li>Output:3.5mm Headphone Jack3.5mm Line-Out &#8211; To Active speaker<\/li>\n<li>Control Knobs:TrebleMiddleBassBalanceVolume<\/li>\n<li>Switches:Defeat: Bypass the tone controlLoudness: Flat or LoudnessQuad Op-Amp design<\/li>\n<li>3 way equalizing: Treble, Middle, and Bass<\/li>\n<li>Treble:Control Range: 3KHz-20KHzTrim Range: -12dB to +12dBCenter Freq: 18KHz<\/li>\n<li>Middle:Control Range: 200Hz-4KHzTrim Range: -10dB to +10dBCenter Freq: 1KHz<\/li>\n<li><\/li>\n<\/ul>\n<p>All information and specification are subject to change without prior notice<br \/>\nAll brand names and trademarks referenced are the properties of their respective owners<br \/>\nPictures above might differ from the actual product delivered<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Datasheet \/ Driver \/ User&#8217;s Manual<\/b><\/p>\n<a rel=\"noopener noreferrer\" href=\"https:\/\/mega.nz\/file\/wEJhASoL#FoY4SHZ1-ziZuIsMkW-n8wBSMH3wbUSCLZnkANPwi_o\" target=\"_blank\" class=\"button primary\"  >\n    <span>Download<\/span>\n  <\/a>\n\n","protected":false},"featured_media":548,"template":"","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"product_cat":[22,68],"product_tag":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.11 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>S21C - Stereo Tri Tone Control Pre-Amp and Headphone Amplifier with battery built-in - www.speeddragon.com<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"S21C - Stereo Tri Tone Control Pre-Amp and Headphone Amplifier with battery built-in - www.speeddragon.com\" \/>\n<meta property=\"og:description\" content=\"Datasheet \/ Driver \/ User&#039;s Manual\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.speeddragon.com\/product\/s21c\/\" \/>\n<meta property=\"og:site_name\" content=\"www.speeddragon.com\" \/>\n<meta property=\"article:modified_time\" content=\"2021-07-22T08:12:10+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.speeddragon.com\/wp-content\/uploads\/2021\/07\/SD-S21C.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"360\" \/>\n\t<meta property=\"og:image:height\" content=\"360\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\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:\/\/www.speeddragon.com\/product\/s21c\/\",\"url\":\"https:\/\/www.speeddragon.com\/product\/s21c\/\",\"name\":\"S21C - Stereo Tri Tone Control Pre-Amp and Headphone Amplifier with battery built-in - www.speeddragon.com\",\"isPartOf\":{\"@id\":\"https:\/\/www.speeddragon.com\/#website\"},\"datePublished\":\"2021-07-22T08:11:22+00:00\",\"dateModified\":\"2021-07-22T08:12:10+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.speeddragon.com\/product\/s21c\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.speeddragon.com\/product\/s21c\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.speeddragon.com\/product\/s21c\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.speeddragon.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Products\",\"item\":\"https:\/\/www.speeddragon.com\/products\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"S21C &#8211; 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