{"product_id":"sundown-audio-m-series-dual-12-sub-and-box-combo-4000w-rms","title":"Sundown Audio M-Series Dual 12” Subwoofer \u0026 Box Combo","description":"\u003cdiv class=\"product-description\"\u003e\n\u003ch2\u003eSundown Audio M-Series Dual 12” Subwoofer \u0026amp; Custom Birch Box Combo – 4000W RMS \/ 8000W Peak (Dual 1Ω or Dual 2Ω)\u003c\/h2\u003e\n\u003ch3\u003eMassive Output Meets Precision Engineering\u003c\/h3\u003e\n\u003cp\u003ePush your system to the next level with the \u003cstrong\u003eSundown Audio M-Series Dual 12” Subwoofer \u0026amp; Box Combo\u003c\/strong\u003e, engineered for serious bassheads who demand performance, reliability, and craftsmanship. Rated at \u003cstrong\u003e4000 Watts RMS \/ 8000 Watts Peak\u003c\/strong\u003e, this dual setup combines Sundown’s powerful new M-Series subwoofers with a handcrafted \u003cstrong\u003eBasshead Supply Branded Series dual birch enclosure\u003c\/strong\u003e — designed, tuned, and built for maximum low-end performance.\u003c\/p\u003e\n\u003ch3\u003eM-Series Subwoofer Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Handling:\u003c\/strong\u003e 2000 Watts RMS \/ 4000 Watts Peak per sub (4000W RMS total)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImpedance Options:\u003c\/strong\u003e Dual 1 Ω or Dual 2 Ω voice coils\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Mega Roll Surround + Patented Mega Frame (U.S. Patent D691596–D741841)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Structure:\u003c\/strong\u003e Quad-Stack 200 mm (7.87”) magnet with 88 mm stack height\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoice Coil:\u003c\/strong\u003e 3\" 4-layer round-wire aluminum on thick aluminum former\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcursion:\u003c\/strong\u003e 35 mm one-way linear travel (4.68″ peak-to-peak)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling System:\u003c\/strong\u003e High-velocity pole vent + vented magnetic gap + cast-aluminum frame venting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop Plate:\u003c\/strong\u003e 20 mm thick for maximum magnetic efficiency\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDistortion Control:\u003c\/strong\u003e Inner-diameter aluminum shorting ring for ultra-low inductive distortion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAppearance:\u003c\/strong\u003e All-black etched backplate with custom M-Series magnet boot\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe \u003cstrong\u003eM-Series\u003c\/strong\u003e brings Sundown’s Mega-platform performance to an affordable level — offering clean, deep, low-distortion bass inspired by the X, Z, and NS lines. Built for both daily drivers and demo walls, it’s one of the most capable subwoofers per dollar ever made.\u003c\/p\u003e\n\u003ch3\u003eDual Enclosure Specifications – Basshead Supply Branded Series\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNet Internal Volume:\u003c\/strong\u003e 5.0 cubic feet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTuning Frequency:\u003c\/strong\u003e 31 Hz – optimized for musical low-end and chest-pounding SPL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePort Area:\u003c\/strong\u003e 70 sq in (16″ x 4.375″ slot port)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubwoofer Cutout Diameter:\u003c\/strong\u003e 11.01″ (per sub)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Handling:\u003c\/strong\u003e Up to 4000W RMS (2000W RMS per subwoofer)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePremium Materials \u0026amp; Craftsmanship\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Full 1” Russian Baltic Birch plywood – no MDF used\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaffle Design:\u003c\/strong\u003e Solid 1” front baffle with 24mm internal bracing for dual sub setups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Seamless screwless design glued with Titebond III adhesive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Carbon gray stain with polyurethane protective topcoat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring:\u003c\/strong\u003e Prewired with 10-gauge OFC speaker wire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal:\u003c\/strong\u003e Recessed satin nickel brass binding posts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEnclosure Dimensions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 18″\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 38.625″\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e 21.75″\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom Build Timeline \u0026amp; Policy\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead Time:\u003c\/strong\u003e 2–3 weeks from order date\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolicy:\u003c\/strong\u003e No refunds once enclosure enters the cut-out phase (made-to-order)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHandcrafted in the USA – Basshead Supply Branded Series 🇺🇸\u003c\/h3\u003e\n\u003cp\u003eThis dual 12\" birch enclosure, purpose-built for the \u003cstrong\u003eSundown Audio M-Series\u003c\/strong\u003e, is part of the Basshead Supply “Branded Series” — created for hardcore enthusiasts demanding unmatched sound quality, strength, and precision. Every enclosure is handcrafted in the USA with superior materials and expert tuning for extreme output and clean, musical response.\u003c\/p\u003e\n\u003cp\u003eWhether you’re chasing demo-level output or clean daily lows, this \u003cstrong\u003eSundown M-Series Dual 12” Combo\u003c\/strong\u003e delivers unbeatable performance, reliability, and true Sundown quality — exclusively available at \u003cstrong\u003eJS Ultimate Sounds\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- SEO Metadata --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- Suggested URL Handle: \/products\/sundown-audio-m-series-dual-12-sub-and-box-combo-4000w-rms --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- Meta Description: Experience chest-pounding bass with the Sundown Audio M-Series Dual 12” Sub \u0026 Box Combo – 4000W RMS, 8000W Peak. Handcrafted Baltic Birch enclosure tuned to 31Hz. Available now at JS Ultimate Sounds. --\u003e","brand":"Bundle","offers":[{"title":"Dual 1 Ohm","offer_id":66741610119213,"sku":null,"price":1829.99,"currency_code":"USD","in_stock":true},{"title":"Dual 2 Ohm","offer_id":66741610151981,"sku":null,"price":1829.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/8096\/4909\/files\/Sundown_Audio_M-Series_Dual_12_Subwoofer_Box_Combo.webp?v=1782197046","url":"https:\/\/www.jsultimatesounds.com\/products\/sundown-audio-m-series-dual-12-sub-and-box-combo-4000w-rms","provider":"JS Ultimate Sounds","version":"1.0","type":"link"}