Audio Intensity
Proline X Dual 12" Sealed Micro Series System | Loaded with Wavtech thinPRO 12
SKU: M12D-S Wav Loaded 4ohm Final
- Best For: Maximum output stealth builds / High-power shallow installs
- Configuration: Dual 12" Sealed — Micro Series
- Volume: 1.20 ft³ Net (0.60 ft³ per driver)
- Tuning: N/A — Sealed
- Sonic Character: High-Output, Deep, Controlled
Financing available — choose Shop Pay Installments at checkout.
What's Included
Proline X Dual 12" Sealed Micro Series System | Loaded with Wavtech thinPRO 12
The Proline X Dual 12" Sealed Micro Series System pairs two Wavtech thinPRO 12 subwoofers with a Proline X Micro Series sealed enclosure built at our Tennessee facility. Total net internal volume is 1.20 ft³ — 0.60 ft³ per driver — the optimum sealed volume per Wavtech's published specification for the thinPRO 12. Combined system power handling is 1,500W RMS with 20mm of one-way linear Xmax per driver and a 5" voice coil on each — all in an enclosure that measures 29" wide and 8" tall. Select your final impedance at checkout: 1 ohm (two Single 2-ohm drivers wired in parallel), 2 ohm (two Single 4-ohm drivers wired in parallel), or 4 ohm (two Single 2-ohm drivers wired in series). The system ships pre-wired to your selected configuration.
Every panel is CNC-cut from 3/4" Langboard Elite MDF at our Tennessee facility — a mill-certified panel stock with a 200 psi internal bond rating, 410,000 psi modulus of elasticity, and 325 lb face screw holding strength. In a dual sealed enclosure, panel rigidity is the entire acoustic story for both chambers. Any flex or air leak corrupts the sealed suspension independently for each driver. This box does not flex and does not leak.
Version III construction uses V-groove combined with dado joinery throughout. The terminal cup is built in-house at our Tennessee facility — ABS/Carbon Fiber Composite body, recessed mount, stainless steel hardware, aluminum landing plates, copper ring terminals, and 12g OFC speaker wire pre-installed. Polyfill is pre-installed and tuned for each chamber. Threaded inserts and stainless 8/32 screws secure both drivers. Nothing to source. Nothing to assemble. It ships ready to wire.
Shipping is included in the price. At 29" wide and 8" tall, this is the largest enclosure in the Micro Series lineup. Two competition-grade 12" drivers in a sealed system at 8" total depth ships as a freight unit. That cost is built into what you see. No freight line item on your order confirmation. What you see is what you pay.
| Enclosure Type | Sealed — Micro Series |
| Configuration | Dual 12" |
| Net Volume | 1.20 ft³ total (0.60 ft³ per driver) |
| Tuning Frequency | N/A — Sealed |
| External Dimensions | 29" W × 8" H × 15" D |
| MDF | Langboard Elite 3/4" |
| Joinery | V-groove + dado |
| Terminal Cup | Recessed ABS/Carbon Fiber Composite |
| Speaker Wire | 12g OFC pre-installed |
| Hardware | Threaded inserts, stainless 8/32 screws |
| Acoustic Treatment | Polyfill pre-installed per chamber |
| Firing Options | Front-fire or down-fire (feet included) |
| Finish | Plush Black |
| Vehicle Fitment | Universal |
| Brand + Model | Wavtech thinPRO 12 |
| Size | 12" |
| Quantity | 2 |
| RMS Power | 750W per driver (1,500W total) |
| Peak Power | 2,250W per driver (4,500W total) |
| Final Impedance Options | 1 ohm / 2 ohm / 4 ohm (select at checkout) |
| 1 ohm wiring | Two Single 2-ohm drivers — parallel |
| 2 ohm wiring | Two Single 4-ohm drivers — parallel |
| 4 ohm wiring | Two Single 2-ohm drivers — series |
| Voice Coil Diameter | 5" (127mm) |
| Xmax | 20mm one-way linear |
| Xmech (peak-to-peak) | 54mm (2.13") |
| Fs (4-ohm driver) | 26 Hz |
| Fs (2-ohm driver) | 25 Hz |
| Qts (4-ohm driver) | 0.46 |
| Qts (2-ohm driver) | 0.49 |
| Cone | Honeycomb Nomex + glass fiber composite |
| Frame | Vented cast aluminum |
| Mounting Depth | 3.0" |
| Cutout Diameter | 11-1/8" |
Built From a Spec Sheet, Not a Sales Sheet
Every Proline X Performance Series enclosure is CNC-cut from Langboard Elite MDF — 3/4" (18mm) panels produced to published mill specifications. Most enclosure manufacturers source generic MDF without published data. We can tell you the internal bond rating, the modulus of elasticity, the modulus of rupture, and the face and edge screw holding strength for every panel in this enclosure — because we chose the material based on those numbers, not on price or availability.
Langboard Elite is produced in the United States. The specifications below are pulled directly from Langboard's published mill data and are verifiable. This is the same panel stock used in our full Proline X lineup.
Langboard Elite MDF — Published Mill Data
| Property | Value | Why It Matters |
|---|---|---|
| Panel Stock | Langboard Elite MDF | Named, verifiable panel source — not generic "high-density MDF" |
| Thickness | 3/4" (18mm) | Industry standard for subwoofer enclosures; panels below this flex under pressure |
| Density | 48.5 lbs/ft³ | Higher density = less porosity, better screw retention, reduced resonance |
| Internal Bond | 200 psi | Measures resistance to delamination under sustained internal pressure — the most enclosure-relevant spec on this sheet |
| Modulus of Rupture (MOR) | 4,200 psi | Bending strength before the panel breaks — relevant for larger unsupported baffle spans |
| Modulus of Elasticity (MOE) | 410,000 psi | Stiffness under load; higher MOE means less panel flex under bass pressure, less resonance |
| Face Screw Holding | 325 lbs | How firmly the panel surface holds a screw; critical for baffle joint integrity over time |
| Edge Screw Holding | 250 lbs | Panel edge retention — relevant for every joint that isn't face-to-face |
200 psi — The Number That Actually Matters for Enclosures
The internal bond rating measures how well the MDF panel resists delamination under sustained pressure applied perpendicular to the face. In a subwoofer enclosure, every bass transient generates a pressure pulse that pushes outward on every panel simultaneously. A panel that begins to delaminate internally loses stiffness gradually — the symptoms are slow: a box that starts to sound softer, less defined, less punchy over months of use. 200 psi internal bond is the spec that determines how long this enclosure holds its acoustic integrity under daily use at real power levels.
410,000 psi MOE — Less Flex, Less Resonance
The modulus of elasticity measures panel stiffness — resistance to bending under load. A stiffer panel flexes less under the pressure generated by a high-excursion driver at volume. Panel flex is a source of acoustic coloration: the panel itself begins to radiate sound at its own resonant frequency, adding distortion to the output. 410,000 psi stiffness combined with V-groove and dado joinery means the panels stay rigid and the bracing controls resonance at the structure level — not the panel level. The bass you hear comes from the driver, not the box.
325 lb Face / 250 lb Edge — Joints That Stay Locked
Screw holding strength determines how firmly the panel grips a fastener at the face and at the edge. This matters most at the baffle joint — where the front panel meets the side panels and where the driver is mounted. A panel with low screw holding strength allows fasteners to loosen over time under vibration, leading to air gaps at the joint and loss of acoustic seal. 325 lb face screw holding strength means the baffle hardware stays put. Combined with dado joinery and adhesive, the front panel on a Proline X Performance Series enclosure is not going anywhere.
Named Panel Stock — Not "Premium MDF"
The phrase "premium MDF" or "high-density MDF" appears on marketing copy for enclosures across every price point, from $40 to $400. It is not a specification — it is a description with no defined standard. Langboard Elite is a named, sourced, mill-documented product with published data. We name it in our copy because naming it holds us accountable to the spec. You can look up Langboard Elite independently, verify the numbers on this page, and confirm you are getting what we say you are getting. That is the point.
Why Proline X?
Most enclosures are built to a price point. Proline X is built to a spec. Every box starts with published-data MDF, gets CNC-cut to exact internal volume, and is assembled by hand in our Tennessee facility. The difference shows up in the measurements — and in how the box holds up two years into daily use.
CNC-Cut to Spec
Panels are machine-cut on ShopSabre CNC routers and joined with V-groove and dado joinery. Consistent geometry, no hand-cut variance, no gaps at the joints.
Handcrafted in USA
Hand-assembled at our facility in Tullahoma, TN. Every enclosure is inspected before it ships.
Tuned to the Build
Internal volume and port geometry are calculated to spec and CNC-cut to exact dimensions. The box performs the same way every time.
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