{"id":17264,"date":"2023-03-01T08:32:03","date_gmt":"2023-03-01T08:32:03","guid":{"rendered":"https:\/\/masteringmansion.com\/pro-audio\/?post_type=product&#038;p=17264"},"modified":"2026-07-07T12:39:58","modified_gmt":"2026-07-07T12:39:58","slug":"sp502-500-series-class-a-preamp","status":"publish","type":"product","link":"https:\/\/masteringmansion.com\/pro-audio\/categorias\/serie-500\/sp502-500-series-class-a-preamp\/","title":{"rendered":"SP502 500 series Class A Preamp"},"content":{"rendered":"<p>Shipping starts at 20 of march 2023&#8230;we accept orders now!<\/p>\n<p>* Selectable output stages, electronically balanced or discrete ClassA.<br \/>\n* Sweepable high-pass filter, 30-400Hz, 12dB\/oct.<br \/>\n* Discrete DIaudio path.<br \/>\n* 70dB of clean gain.<br \/>\n* Selectable saturation circuit for extra harmonics.<br \/>\n* Discrete ClassA output stage with Carnhill transformer.<\/p>\n<p><strong><u>\u00a0<\/u><\/strong><\/p>\n<p><strong><u>Overview<\/u><\/strong><\/p>\n<p>SP502 is a new single slot 500-series preamp with a unique hybrid design including both vintage and modern circuits.<\/p>\n<p>A new transformerless input stage forms a clean and transparent front-end, together with the two selectable output stages you can get the low mid punch and thick sound associated with British Class A from the early 70\u2019s as well as a more modern clean tone from the 80\u2019s and 90\u2019s.<\/p>\n<p>SP502 is also equipped with a saturation stage that can be selected to add some extra harmonics to the signal. The sweepable HPF from 30Hz to 400Hz allows precision crafting of the low end.<\/p>\n<p>A new function is that the instrument input can be routed directly to the output stage without passing the preamp stage (the saturation circuit and HPF can still be inserted).<br \/>\nThe DI direct mode together with the vintage Class A stage gives you a very nice discrete sound path for bass recording.<\/p>\n<p>&nbsp;<\/p>\n<p><strong><u>Specifications<\/u><\/strong><\/p>\n<p>Power requirement: +130mA\u00a0\/ -130mA<br \/>\nInput impedance: 2400 ohm<br \/>\nInstrument input impedance: 1Mohm<br \/>\nMax output level: electronically balanced +25dBu, Class A +24dBu<\/p>\n<p>DI direct gain: +15dB<\/p>\n<p>THD+N @ +20dBu electronic balanced output: 0,0008%<\/p>\n<p>THD+N @ +20dBu Class A output: 0,007%<\/p>\n<p>THD+N @ +20dBu saturation active: 0,9%<\/p>\n<p>Frequency response electronic balanced: -0,6dB @ 80kHz<\/p>\n<p>Frequency response ClassA: -0,5dB @ 20kHz<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Features:<\/strong><\/p>\n<p>Gain switch in 5dB steps: -15 to -70dB. +15dB to -40 with -30dB pad selected<br \/>\n48v phantom power<br \/>\nSelectable output stage: vintage transformer balanced ClassA or electronically balanced<br \/>\nSweepable high pass filter: 30-400Hz, 12dB sloop<br \/>\nSaturation: inserts a saturation stage for extra harmonics after the input stage<br \/>\nPolarity switch<br \/>\nDirect: routs the instrument input directly to the output stage<br \/>\nIn: activates the instrument input<br \/>\nHi-Z input, instrument input with more than 1Mohm input impedance<br \/>\nOutput level control<br \/>\nIlluminated switches (except for the phantom toggle switch which has a separate LED)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Disponible a mediados de mayo. TK Audio is entering the 500 series preamp market with &#8230;<\/p>\n<p>Shipping starts at 20 of march 2023&#8230;we accept orders now!<\/p>\n","protected":false},"featured_media":17265,"template":"","meta":[],"pwb-brand":[219],"product_brand":[],"product_cat":[1032],"product_tag":[489],"class_list":["post-17264","product","type-product","status-publish","has-post-thumbnail","pwb-brand-tk-audio","product_cat-serie-500","product_tag-tk-audio","first","outofstock","sale","taxable","shipping-taxable","purchasable","product-type-simple"],"brands":[{"id":219,"name":"TK AUDIO","slug":"tk-audio"}],"_links":{"self":[{"href":"https:\/\/masteringmansion.com\/pro-audio\/wp-json\/wp\/v2\/product\/17264","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/masteringmansion.com\/pro-audio\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/masteringmansion.com\/pro-audio\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/masteringmansion.com\/pro-audio\/wp-json\/wp\/v2\/media\/17265"}],"wp:attachment":[{"href":"https:\/\/masteringmansion.com\/pro-audio\/wp-json\/wp\/v2\/media?parent=17264"}],"wp:term":[{"taxonomy":"pwb-brand","embeddable":true,"href":"https:\/\/masteringmansion.com\/pro-audio\/wp-json\/wp\/v2\/pwb-brand?post=17264"},{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/masteringmansion.com\/pro-audio\/wp-json\/wp\/v2\/product_brand?post=17264"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/masteringmansion.com\/pro-audio\/wp-json\/wp\/v2\/product_cat?post=17264"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/masteringmansion.com\/pro-audio\/wp-json\/wp\/v2\/product_tag?post=17264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}