{"id":457902,"date":"2024-11-17T08:27:33","date_gmt":"2024-11-17T08:27:33","guid":{"rendered":"https:\/\/www.techforbrains.com\/?p=457902"},"modified":"2024-11-17T08:27:39","modified_gmt":"2024-11-17T08:27:39","slug":"limestone-pp1-monoblock-utilizing-kt88-tubes","status":"publish","type":"post","link":"https:\/\/www.stereoindex.com\/tech\/hi-fi\/limestone-pp1-monoblock-utilizing-kt88-tubes\/","title":{"rendered":"Limestone PP1: Monoblock utilizing KT88 tubes"},"content":{"rendered":"<p>The Limestone PP1 mono tube power amplifier, produced by the Croatian brand Limestone, merges traditional circuit design with contemporary aesthetics. Its chassis, crafted from 1.5 mm stainless steel, ensures durability while offering a sleek finish that embodies the classic charm of vintage audio equipment. Furthermore, the inclusion of decorative Kerrock overlays enhances its overall sophistication.<\/p>\n<figure id=\"attachment_457904\" aria-describedby=\"caption-attachment-457904\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-457904\" src=\"https:\/\/www.stereoindex.com\/tech\/wp-content\/uploads\/2024\/11\/Limestone-PP1-\u2013-monoblock-on-KT88-lamps.jpg\" alt=\"Limestone PP1 \u2013 monoblock on KT88 lamps\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.stereoindex.com\/tech\/wp-content\/uploads\/2024\/11\/Limestone-PP1-\u2013-monoblock-on-KT88-lamps.jpg 1280w, https:\/\/www.stereoindex.com\/tech\/wp-content\/uploads\/2024\/11\/Limestone-PP1-\u2013-monoblock-on-KT88-lamps-800x450.jpg 800w, https:\/\/www.stereoindex.com\/tech\/wp-content\/uploads\/2024\/11\/Limestone-PP1-\u2013-monoblock-on-KT88-lamps-1030x579.jpg 1030w, https:\/\/www.stereoindex.com\/tech\/wp-content\/uploads\/2024\/11\/Limestone-PP1-\u2013-monoblock-on-KT88-lamps-100x56.jpg 100w, https:\/\/www.stereoindex.com\/tech\/wp-content\/uploads\/2024\/11\/Limestone-PP1-\u2013-monoblock-on-KT88-lamps-909x511.jpg 909w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><figcaption id=\"caption-attachment-457904\" class=\"wp-caption-text\">Limestone PP1 \u2013 monoblock on KT88 lamps<\/figcaption><\/figure>\n<p>The output stage of the Limestone PP1 amplifier employs a push-pull configuration utilizing KT88 tubes. For the phase splitter and driver stage, Shuguang Black Treasure CV181-Z tubes are used, which can be substituted with 6SN7 TAD or NOS Sylvania &#8220;Bad Boy&#8221; tubes upon request. It features high-quality gold-plated WBT connectors for speaker system connections. This meticulously hand-assembled tube amplifier offers outstanding audio performance, merging expert engineering with top-tier components.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.stereoindex.com\/tech\/wp-content\/uploads\/2024\/11\/673789d0ef49d_870.webp\" alt=\"Limestone PP1 Tube Mono Power Amplifier\" \/><\/p>\n<h3><b>Specifications:<\/b><b><\/b><\/h3>\n<ul>\n<li><b>Output power:<\/b>\u00a045 watts per channel<\/li>\n<li><b>Frequency response:<\/b>\u00a030 Hz \u2013 30 kHz (-3 dB)<\/li>\n<li><b>Total Harmonic Distortion:<\/b>\u00a0Less than 1% at 1 kHz<\/li>\n<li><b>Signal to noise ratio:<\/b>\u00a085 dB (noise about 1 mV)<\/li>\n<li><b>Input sensitivity:<\/b>\u00a00.7V RMS for full 45W output power<\/li>\n<li><b>Load resistance:<\/b>\u00a04 Ohm and 8 Ohm<\/li>\n<li><b>Dimensions (W\u00a0<\/b><b>x\u00a0<\/b><b>H\u00a0<\/b><b>x\u00a0<\/b><b>D):<\/b>\u00a025 x 25 x 55 cm<b><\/b><b><\/b><b><\/b><b><\/b><b><\/b><\/li>\n<li><b>Weight\u00a0<\/b><b>:<\/b>\u00a018 kg<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The Limestone PP1 mono tube power amplifier, produced by the Croatian brand Limestone, merges traditional circuit design with contemporary aesthetics. Its chassis, crafted from 1.5 mm stainless steel, ensures durability while offering a sleek finish that embodies the classic charm of vintage audio equipment. Furthermore, the inclusion of decorative Kerrock overlays enhances its overall sophistication. [&hellip;] <a class=\"g1-link g1-link-more\" href=\"https:\/\/www.stereoindex.com\/tech\/hi-fi\/limestone-pp1-monoblock-utilizing-kt88-tubes\/\">More<\/a><\/p>\n","protected":false},"author":10402,"featured_media":457903,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"categories":[642],"tags":[779],"class_list":{"0":"post-457902","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-hi-fi","8":"tag-news"},"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/posts\/457902","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/users\/10402"}],"replies":[{"embeddable":true,"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/comments?post=457902"}],"version-history":[{"count":1,"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/posts\/457902\/revisions"}],"predecessor-version":[{"id":457906,"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/posts\/457902\/revisions\/457906"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/media\/457903"}],"wp:attachment":[{"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/media?parent=457902"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/categories?post=457902"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.stereoindex.com\/tech\/wp-json\/wp\/v2\/tags?post=457902"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}