{"product_id":"mackie-hm-4-4-way-headphone-amplifier-mixer","title":"Mackie HM-4 4-Way Headphone Amplifier Mixer","description":"\u003cp\u003e\u003cstrong\u003eThe Mackie HM-4 is a compact 4-way headphone amplifier that lets one stereo source feed four headphones with independent volume control.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe HM-4 is an ultra-compact accessory designed to split a single 1\/4\" stereo input across four 1\/4\" headphone outputs without sacrificing control or build quality. Its metal enclosure, included 12V adapter, and dedicated level knobs make it a practical choice for home studios, rehearsal rooms, classroom setups, or collaborative listening sessions. It keeps signal routing simple while giving each listener the ability to set their preferred volume.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I connect the HM-4 to my audio setup?\u003c\/h3\u003e\n\u003cp\u003eConnecting is straightforward: plug your stereo source into the single 1\/4\" input and connect up to four headphones to the outputs. Power the unit with the included 12V AC adapter and use the front-mounted volume knobs to set each listener's level independently.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOne 1\/4\" stereo input accepts line\/headphone outputs from mixers, interfaces, or phones (with adapter).\u003c\/li\u003e\n  \u003cli\u003eFour 1\/4\" outputs for standard headphones—no splitters required.\u003c\/li\u003e\n  \u003cli\u003eSupplied 12V adapter powers the amplifier for consistent performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill the HM-4 affect sound quality or introduce noise?\u003c\/h3\u003e\n\u003cp\u003eThe HM-4 is engineered to preserve the incoming stereo signal while distributing it to multiple listeners. Its solid metal chassis and dedicated amplification circuitry minimize crosstalk and preserve clarity at reasonable listening levels, though extreme volumes may still be limited by headphone power requirements.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIndividual level pots reduce channel interaction between outputs.\u003c\/li\u003e\n  \u003cli\u003eRugged construction helps shield electronics from interference.\u003c\/li\u003e\n  \u003cli\u003eDesigned for clean splitting of a single stereo source to four outputs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow portable and durable is this unit for studio or live use?\u003c\/h3\u003e\n\u003cp\u003eThe HM-4's compact footprint and robust metal housing make it easy to carry and durable enough for frequent use. It fits comfortably on a desk, in a rack case, or inside a gig bag, and the included power supply means you can set it up quickly without hunting for adapters.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUltra-compact design occupies minimal desk or stage space.\u003c\/li\u003e\n  \u003cli\u003eMetal chassis withstands regular handling and transport.\u003c\/li\u003e\n  \u003cli\u003eLightweight enough to add to portable setups without bulk.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat control features does each headphone have?\u003c\/h3\u003e\n\u003cp\u003eEach headphone output features its own level control so listeners can personalize volume without affecting others. The front-panel knobs are easy to reach and provide smooth adjustment for rehearsal, tracking, or casual listening.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFour independent volume knobs—one per headphone output.\u003c\/li\u003e\n  \u003cli\u003eFront-panel placement for quick, tactile control during sessions.\u003c\/li\u003e\n  \u003cli\u003eSimple layout reduces setup time and user confusion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Mackie HM-4 suits home producers, small project studios, music teachers, and bands who need a compact, reliable way to share one stereo feed with up to four listeners. If you require portable multi-listening with independent volume control and a tough build, the HM-4 offers a practical, no-frills solution without complex routing.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How many headphones can the HM-4 support at once?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The HM-4 supports up to four pairs of headphones simultaneously from one stereo input.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the HM-4 include a power supply?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the HM-4 includes a 12V AC adapter for immediate use and consistent operation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Mackie","offers":[{"title":"Default Title","offer_id":48444251209885,"sku":"B079C8MLG8","price":70.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/9596\/1757\/files\/mackie-hm4-front-panel.jpg?v=1781542115","url":"https:\/\/nexoltic.com\/products\/mackie-hm-4-4-way-headphone-amplifier-mixer","provider":"Nexoltic","version":"1.0","type":"link"}