{"id":28296,"date":"2011-09-27T23:22:32","date_gmt":"2011-09-27T21:22:32","guid":{"rendered":"http:\/\/cyberfarm-wp.flywheelsites.com\/?product=retro-instruments-2a3-dual-program-eq"},"modified":"2026-04-27T10:46:37","modified_gmt":"2026-04-27T08:46:37","slug":"retro-instruments-2a3-dual-program-eq","status":"publish","type":"product","link":"https:\/\/cyberfarm.dk\/en\/retro-instruments-2a3-dual-program-eq\/","title":{"rendered":"Retro Instruments 2A3 Dual Program EQ"},"content":{"rendered":"
\n

Retro Instruments 2A3 Dual Program EQ - Stereo All-Tube Equaliser<\/h2>\n

The Retro Instruments 2A3 Dual Program EQ<\/strong> is a dual-channel, all-tube equaliser<\/strong> inspired by the classic Pultec EQP-1A design - expanded, refined, and optimised for today's mastering and mix engineers.
\nIt combines two complete passive EQ sections<\/strong> with Retro's precision high-voltage tube amplification to deliver rich harmonic warmth, velvety highs, and powerful low-end control.
\nThe 2A3 is a mastering-grade equaliser that maintains all the musicality of the original vintage circuits while offering the consistency, reliability, and stereo precision of a modern professional unit.<\/p>\n

 <\/p>\n

Key Features<\/h3>\n
    \n
  • Dual-channel design<\/strong> - true stereo EQ with fully independent controls for each channel.<\/li>\n
  • Classic Pultec-style passive EQ topology<\/strong> with Retro Instruments\u2019 all-tube makeup gain stage.<\/li>\n
  • Boost and cut simultaneously<\/strong> for the famous Pultec low-end resonance and \u201cpush-pull\u201d tone sculpting.<\/li>\n
  • Three-band EQ<\/strong> with low-frequency shelving, high-frequency peaking, and high cut filters.<\/li>\n
  • Premium tubes and custom transformers<\/strong> for unmatched clarity, warmth, and harmonic balance.<\/li>\n
  • High-voltage power supply<\/strong> for maximum headroom and ultra-low distortion.<\/li>\n
  • Balanced I\/O<\/strong> on XLR for professional studio integration.<\/li>\n
  • Hand-built in the USA with military-grade components for long-term reliability.<\/li>\n
  • Perfect for mix bus, mastering, and tracking<\/strong> applications where musical tone shaping is essential.<\/li>\n<\/ul>\n

     <\/p>\n

    Applications<\/h3>\n
      \n
    • Mastering:<\/strong> Add analogue depth, smoothness, and air to full mixes with classic tube warmth.<\/li>\n
    • Mix Bus:<\/strong> Enhance low-end weight and top-end clarity for mix cohesion and polish.<\/li>\n
    • Vocals:<\/strong> Shape tone and presence naturally without harshness.<\/li>\n
    • Bass & Drums:<\/strong> Add punch, thickness, and analogue character to rhythm sections.<\/li>\n<\/ul>\n

       <\/p>\n

      Technical Specifications<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      Unit Type<\/th>\nDual-Channel \/ Stereo All-Tube Equaliser<\/td>\n<\/tr>\n
      Circuit Type<\/th>\nPassive EQ network with Class A tube amplification<\/td>\n<\/tr>\n
      EQ Bands<\/th>\nLow Shelf Boost\/Cut, High Shelf Boost, High Cut<\/td>\n<\/tr>\n
      Low Frequency Selection<\/th>\n20, 30, 60, 100 Hz<\/td>\n<\/tr>\n
      High Frequency Boost<\/th>\n3, 4, 5, 8, 10, 12, 16 kHz<\/td>\n<\/tr>\n
      High Frequency Cut<\/th>\n5, 10, 20 kHz<\/td>\n<\/tr>\n
      Tubes<\/th>\nMatched high-voltage NOS dual triodes and pentodes<\/td>\n<\/tr>\n
      Transformers<\/th>\nCustom Retro Instruments input and output transformers<\/td>\n<\/tr>\n
      Frequency Response<\/th>\n20 Hz - 20 kHz \u00b10.5 dB<\/td>\n<\/tr>\n
      THD + N<\/th>\n0.05% typical (1 kHz @ +4 dBu)<\/td>\n<\/tr>\n
      Input\/Output Impedance<\/th>\n600 \u03a9 balanced<\/td>\n<\/tr>\n
      Power<\/th>\nInternal universal power supply (100-240V AC)<\/td>\n<\/tr>\n
      Form Factor<\/th>\n3U rackmount chassis<\/td>\n<\/tr>\n
      Weight<\/th>\nApprox. 9.5 kg<\/td>\n<\/tr>\n
      Origin<\/th>\nHand-built in the USA<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

       <\/p>\n

      Why Choose the Retro Instruments 2A3?<\/h3>\n

      The Retro Instruments 2A3 Dual Program EQ<\/strong> captures the legendary Pultec-style tube tone<\/strong> in a precise, stereo-matched format built for modern studios.
      \nIts ability to simultaneously boost and cut frequencies, combined with Retro's impeccable tube amplification, produces the signature silky highs, solid lows, and open midrange<\/strong> that define world-class analogue equalization.
      \nWhether on the mix bus, mastering chain, or individual tracks, the 2A3 delivers vintage warmth with modern fidelity<\/strong> - a must-have for professional engineers seeking timeless musicality.<\/p>\n<\/section>","protected":false},"excerpt":{"rendered":"

      Retro Instruments 2A3 Dual Program EQ \u2013 Stereo All-Tube Equalizer The Retro Instruments 2A3 Dual Program EQ is a dual-channel, all-tube equalizer inspired by the classic Pultec EQP-1A design \u2014 expanded, refined, and optimized for today\u2019s mastering and mix engineers. It combines two complete passive EQ sections with Retro\u2019s precision high-voltage tube amplification to deliver […]\n","protected":false},"featured_media":70201,"template":"","meta":{"_seopress_titles_title":"%%post_title%%","_seopress_titles_desc":"%%post_excerpt%%","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"none","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"both","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"Retro Instruments 2A3,Retro 2A3 EQ,Dual Program EQ,Pultec-style tube EQ,Retro Instruments equalizer,mastering tube EQ,stereo analog EQ,Retro Instruments outboard gear,Retro tube equalizer,high-end analog mastering EQ","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[]},"product_brand":[4185],"product_cat":[1830],"product_tag":[],"class_list":["post-28296","product","type-product","status-publish","has-post-thumbnail","product_brand-retro-instruments","product_cat-equalizer","first","onbackorder","taxable","shipping-taxable","purchasable","product-type-simple"],"publishpress_future_action":{"enabled":false,"date":"2026-06-24 23:16:41","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"product_tag","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/cyberfarm.dk\/en\/wp-json\/wp\/v2\/product\/28296","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cyberfarm.dk\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/cyberfarm.dk\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cyberfarm.dk\/en\/wp-json\/wp\/v2\/media\/70201"}],"wp:attachment":[{"href":"https:\/\/cyberfarm.dk\/en\/wp-json\/wp\/v2\/media?parent=28296"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/cyberfarm.dk\/en\/wp-json\/wp\/v2\/product_brand?post=28296"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/cyberfarm.dk\/en\/wp-json\/wp\/v2\/product_cat?post=28296"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/cyberfarm.dk\/en\/wp-json\/wp\/v2\/product_tag?post=28296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}