Sundown Audio M-Series Dual 12” Subwoofer & Box Combo
Many in-stock orders ship within 1-2 business days, but timing varies by item. Custom, built-to-order, oversized, special-order and supplier-direct products may need extra processing time. Free shipping applies to qualifying orders over $99 in the contiguous US. Approved returns may be subject to a restocking fee.
Most products are covered by the manufacturer's warranty against defects. Damage from over-powering or improper installation isn't covered — we'll help coordinate any valid claim.
Tell us your vehicle, subwoofers and electrical setup and our team will help you match the right gear. Reach out before you buy.
%0AMassive%20Output%20Meets%20Precision%20Engineering%0APush%20your%20system%20to%20the%20next%20level%20w...
){kind=link}
Sundown Audio M-Series Dual 12” Subwoofer & Custom Birch Box Combo – 4000W RMS / 8000W Peak (Dual 1Ω or Dual 2Ω)
Massive Output Meets Precision Engineering
Push your system to the next level with the Sundown Audio M-Series Dual 12” Subwoofer & Box Combo, engineered for serious bassheads who demand performance, reliability, and craftsmanship. Rated at 4000 Watts RMS / 8000 Watts Peak, this dual setup combines Sundown’s powerful new M-Series subwoofers with a handcrafted Basshead Supply Branded Series dual birch enclosure — designed, tuned, and built for maximum low-end performance.
M-Series Subwoofer Highlights
- Power Handling: 2000 Watts RMS / 4000 Watts Peak per sub (4000W RMS total)
- Impedance Options: Dual 1 Ω or Dual 2 Ω voice coils
- Design: Mega Roll Surround + Patented Mega Frame (U.S. Patent D691596–D741841)
- Motor Structure: Quad-Stack 200 mm (7.87”) magnet with 88 mm stack height
- Voice Coil: 3" 4-layer round-wire aluminum on thick aluminum former
- Excursion: 35 mm one-way linear travel (4.68″ peak-to-peak)
- Cooling System: High-velocity pole vent + vented magnetic gap + cast-aluminum frame venting
- Top Plate: 20 mm thick for maximum magnetic efficiency
- Distortion Control: Inner-diameter aluminum shorting ring for ultra-low inductive distortion
- Appearance: All-black etched backplate with custom M-Series magnet boot
The M-Series 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.
Dual Enclosure Specifications – Basshead Supply Branded Series
- Net Internal Volume: 5.0 cubic feet
- Tuning Frequency: 31 Hz – optimized for musical low-end and chest-pounding SPL
- Port Area: 70 sq in (16″ x 4.375″ slot port)
- Subwoofer Cutout Diameter: 11.01″ (per sub)
- Power Handling: Up to 4000W RMS (2000W RMS per subwoofer)
Premium Materials & Craftsmanship
- Material: Full 1” Russian Baltic Birch plywood – no MDF used
- Baffle Design: Solid 1” front baffle with 24mm internal bracing for dual sub setups
- Construction: Seamless screwless design glued with Titebond III adhesive
- Finish: Carbon gray stain with polyurethane protective topcoat
- Wiring: Prewired with 10-gauge OFC speaker wire
- Terminal: Recessed satin nickel brass binding posts
Enclosure Dimensions
- Height: 18″
- Width: 38.625″
- Depth: 21.75″
Custom Build Timeline & Policy
- Lead Time: 2–3 weeks from order date
- Policy: No refunds once enclosure enters the cut-out phase (made-to-order)
Handcrafted in the USA – Basshead Supply Branded Series 🇺🇸
This dual 12" birch enclosure, purpose-built for the Sundown Audio M-Series, 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.
Whether you’re chasing demo-level output or clean daily lows, this Sundown M-Series Dual 12” Combo delivers unbeatable performance, reliability, and true Sundown quality — exclusively available at JS Ultimate Sounds.
