{"id":652,"date":"2026-10-04T12:26:48","date_gmt":"2026-10-04T12:26:48","guid":{"rendered":"https:\/\/soundslekker.com\/?post_type=product&#038;p=652"},"modified":"2026-10-04T12:28:35","modified_gmt":"2026-10-04T12:28:35","slug":"sennheiser-md421-u-4-dynamic-microphone-1970s","status":"publish","type":"product","link":"https:\/\/soundslekker.com\/?product=sennheiser-md421-u-4-dynamic-microphone-1970s","title":{"rendered":"Sennheiser MD421 U-4 Dynamic Microphone (1970&#8217;s)"},"content":{"rendered":"<p>The first standard black 421! The MD421-U4 was a 70&#8217;s innovation of the classic MD-421 series. Featuring the 5 way low roll-off switch, this is still a 421 from the golden age despite it&#8217;s modern appearance and XLR connector!<\/p>\n<p>Sounds wonder<em>full\u00a0<\/em>thanks to an internal diaphragm cleaning. This also had a touch of grill reshaping &amp; painting to get it back looking nice. This is operating at full frequency response, the 5 way switch is function properly. All ready to rock on stage or in studio.<\/p>\n<p>Includes custom 3D printed clip as well as an original Sennheiser leatherette case.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The first standard black MD421! Five way low end roll off, one way ticket to tone-town.<\/p>\n<p>Many don&#8217;t realize that Sennheiser made black 421&#8217;s this far back, but these U4&#8217;s have high quality components like the early 421&#8217;s and sound fantastic, plus they have the added benefit of an XLR connection.<\/p>\n","protected":false},"featured_media":659,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[57],"product_cat":[47],"product_tag":[53],"class_list":["post-652","product","type-product","status-publish","has-post-thumbnail","product_brand-sennheiser","product_cat-dynamic","product_tag-1970s","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sennheiser MD421 U-4 Dynamic Microphone (1970&#039;s) - Sounds Lekker<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/soundslekker.com\/?product=sennheiser-md421-u-4-dynamic-microphone-1970s\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sennheiser MD421 U-4 Dynamic Microphone (1970&#039;s) - Sounds Lekker\" \/>\n<meta property=\"og:description\" content=\"The first standard black MD421! Five way low end roll off, one way ticket to tone-town.  Many don&#039;t realize that Sennheiser made black 421&#039;s this far back, but these U4&#039;s have high quality components like the early 421&#039;s and sound fantastic, plus they have the added benefit of an XLR connection.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/soundslekker.com\/?product=sennheiser-md421-u-4-dynamic-microphone-1970s\" \/>\n<meta property=\"og:site_name\" content=\"Sounds Lekker\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-04T12:28:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/soundslekker.com\/wp-content\/uploads\/2026\/10\/Library-1-of-6-1-scaled.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"2560\" \/>\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:\\\/\\\/soundslekker.com\\\/?product=sennheiser-md421-u-4-dynamic-microphone-1970s\",\"url\":\"https:\\\/\\\/soundslekker.com\\\/?product=sennheiser-md421-u-4-dynamic-microphone-1970s\",\"name\":\"Sennheiser MD421 U-4 Dynamic Microphone (1970's) - Sounds Lekker\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/soundslekker.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/soundslekker.com\\\/?product=sennheiser-md421-u-4-dynamic-microphone-1970s#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/soundslekker.com\\\/?product=sennheiser-md421-u-4-dynamic-microphone-1970s#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/soundslekker.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/Library-1-of-6-1-scaled.jpeg\",\"datePublished\":\"2026-10-04T12:26:48+00:00\",\"dateModified\":\"2026-10-04T12:28:35+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/soundslekker.com\\\/?product=sennheiser-md421-u-4-dynamic-microphone-1970s#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/soundslekker.com\\\/?product=sennheiser-md421-u-4-dynamic-microphone-1970s\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/soundslekker.com\\\/?product=sennheiser-md421-u-4-dynamic-microphone-1970s#primaryimage\",\"url\":\"https:\\\/\\\/soundslekker.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/Library-1-of-6-1-scaled.jpeg\",\"contentUrl\":\"https:\\\/\\\/soundslekker.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/Library-1-of-6-1-scaled.jpeg\",\"width\":1920,\"height\":2560},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/soundslekker.com\\\/?product=sennheiser-md421-u-4-dynamic-microphone-1970s#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/soundslekker.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Shop\",\"item\":\"https:\\\/\\\/soundslekker.com\\\/?page_id=5\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Sennheiser MD421 U-4 Dynamic Microphone (1970&#8217;s)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/soundslekker.com\\\/#website\",\"url\":\"https:\\\/\\\/soundslekker.com\\\/\",\"name\":\"Sounds Lekker\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/soundslekker.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Sennheiser MD421 U-4 Dynamic Microphone (1970's) - Sounds Lekker","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/soundslekker.com\/?product=sennheiser-md421-u-4-dynamic-microphone-1970s","og_locale":"en_US","og_type":"article","og_title":"Sennheiser MD421 U-4 Dynamic Microphone (1970's) - Sounds Lekker","og_description":"The first standard black MD421! 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