{"id":24436,"date":"2010-12-04T17:50:19","date_gmt":"2010-12-05T01:50:19","guid":{"rendered":"http:\/\/9n2.ac0.myftpupload.com\/1313\/?p=2347"},"modified":"2010-12-04T17:50:19","modified_gmt":"2010-12-05T01:50:19","slug":"inside-the-langevin-eq-259-a-passive-filter","status":"publish","type":"post","link":"https:\/\/ericbeam.com\/?p=24436","title":{"rendered":"Inside the Langevin EQ-259-A Passive Filter"},"content":{"rendered":"\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[5],"tags":[50,196],"class_list":["post-24436","post","type-post","status-publish","format-standard","hentry","category-hardware","tag-filter","tag-langevin","excerpt","zoom","full-without-featured","even","excerpt-0"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":24465,"url":"https:\/\/ericbeam.com\/?p=24465","url_meta":{"origin":24436,"position":0},"title":"DIY TB550A","author":"Eric","date":"April 5, 2012","format":false,"excerpt":"Finished this guy up tonight (TB550A). Not the easiest of builds, as mentioned patience is key. I made a couple careless mistakes along the way, but all are resolved. TIP - Triple check alignment\/orientations at all stages. For the time being I've loaded it up with a pair of 990's\u2026","rel":"","context":"In "Daily Noize"","block_context":{"text":"Daily Noize","link":"https:\/\/ericbeam.com\/?cat=4"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/uploads\/2012\/04\/13548654275_9db8abff03_c.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/uploads\/2012\/04\/13548654275_9db8abff03_c.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/uploads\/2012\/04\/13548654275_9db8abff03_c.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":24368,"url":"https:\/\/ericbeam.com\/?p=24368","url_meta":{"origin":24436,"position":1},"title":"Digital EQ Fact & Myth.","author":"Eric","date":"March 11, 2009","format":false,"excerpt":"\u00a0 All Digital Parametric EQ's are the same. Read the entire post to fully understand the statement. You might be sitting there thinking (hey my Waves, URS, Vox, blah blah sound completely different). With some emulation plugins you have EQ+X. X can = Saturation, bandwidth limits, softclips, offset numerical values,\u2026","rel":"","context":"In "Analysis"","block_context":{"text":"Analysis","link":"https:\/\/ericbeam.com\/?cat=3"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/uploads\/2009\/03\/517-150x102.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/uploads\/2009\/03\/517-150x102.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/uploads\/2009\/03\/517-150x102.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/uploads\/2009\/03\/517-150x102.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/uploads\/2009\/03\/517-150x102.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":24492,"url":"https:\/\/ericbeam.com\/?p=24492","url_meta":{"origin":24436,"position":2},"title":"Kick drum mics with on-board EQ – recordinghacks.com article.","author":"Eric","date":"May 31, 2013","format":false,"excerpt":"Finished up part two of the kick mic review for\u00a0recordinghacks.com. Visit this link to read\/hear more\u00a0http:\/\/recordinghacks.com\/2013\/05\/26\/d12vr-m82-shootout\/","rel":"","context":"In "Analysis"","block_context":{"text":"Analysis","link":"https:\/\/ericbeam.com\/?cat=3"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/uploads\/2025\/03\/kick-drum-mics-with-on-board-eq.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/uploads\/2025\/03\/kick-drum-mics-with-on-board-eq.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/uploads\/2025\/03\/kick-drum-mics-with-on-board-eq.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/uploads\/2025\/03\/kick-drum-mics-with-on-board-eq.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/uploads\/2025\/03\/kick-drum-mics-with-on-board-eq.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":24440,"url":"https:\/\/ericbeam.com\/?p=24440","url_meta":{"origin":24436,"position":3},"title":"Circuit stroking & solder fumes.","author":"Eric","date":"March 3, 2011","format":false,"excerpt":"Well I've been spending a fair amount of time analog prototyping future designs. Currently have a few a pre\/driver\/filter\/dist ideas in mind. I find there is a need\/demand for those outside of the \"euro rack\" crowd\/format.\u00a0 Also been piecing together a MNAT rev A on my off time.","rel":"","context":"In "Hardware"","block_context":{"text":"Hardware","link":"https:\/\/ericbeam.com\/?cat=5"},"img":{"alt_text":"analog prototyping.","src":"https:\/\/i0.wp.com\/farm6.static.flickr.com\/5020\/5495268580_b95e485b0e_m.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":24430,"url":"https:\/\/ericbeam.com\/?p=24430","url_meta":{"origin":24436,"position":4},"title":"Duende Ver 2.5.9 DSP vs Ver 3.5.2 "Hybrid" Signal analysis","author":"Eric","date":"September 15, 2010","format":false,"excerpt":"Duende Ver 2.5.9 DSP vs Ver 3.5.2 \"Hybrid\" Signal analysis Bus Comp Sampling mode: 24-bit, 48 kHz Summary Frequency response +0.20, -0.59 +0.24, -1.27 Noise level, dB (A): -135.4 -138.1 Dynamic range, dB (A): 124.6 127.2 THD, %: 0.069 0.179 IMD + Noise, %: 2.277 2.197 Stereo crosstalk, dB: -138.9\u2026","rel":"","context":"In "Analysis"","block_context":{"text":"Analysis","link":"https:\/\/ericbeam.com\/?cat=3"},"img":{"alt_text":"Spectrum graph","src":"https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/mediaarchive\/wp-content\/uploads\/2010\/09\/Buscomp\/fr.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":24545,"url":"https:\/\/ericbeam.com\/?p=24545","url_meta":{"origin":24436,"position":5},"title":"Audix D1 \/ Beyerdynamic M422","author":"Eric","date":"December 29, 2014","format":false,"excerpt":"Audix-D1-Snare-Batter-No-EQ Beyerdynamic-M422-Snare-Batter-No-EQ","rel":"","context":"In "Analysis"","block_context":{"text":"Analysis","link":"https:\/\/ericbeam.com\/?cat=3"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/ericbeam.com\/wp-content\/uploads\/2015\/12\/artworks-000086233637-0jgejb-t500x500.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/ericbeam.com\/index.php?rest_route=\/wp\/v2\/posts\/24436","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ericbeam.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ericbeam.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ericbeam.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ericbeam.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=24436"}],"version-history":[{"count":0,"href":"https:\/\/ericbeam.com\/index.php?rest_route=\/wp\/v2\/posts\/24436\/revisions"}],"wp:attachment":[{"href":"https:\/\/ericbeam.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=24436"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ericbeam.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24436"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ericbeam.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24436"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}