Alpine RSW10D4 Shallow Subwoofer in Proline X Micro Series Enclosure|Proline X|Audio Intensity

Proline X

Proline X Single 10" Sealed Micro Series System | Loaded with Alpine RSW10D4

SKU: M10-S Alp

QUICK SPECS

Best For: High-output stealth installs / Space-limited SQ builds
Configuration: Single 10" Sealed — Micro Series
Volume: 0.50 ft³ Net
Tuning: N/A — Sealed
Sonic Character: Deep, Accurate, High-Output

Proline X Enclosure — Built in Tennessee CNC-cut Langboard Elite 3/4" MDF, V-groove + dado joinery, recessed ABS/Carbon Fiber terminal cup.

Driver + Enclosure — Matched and Pre-Wired Subwoofer pre-installed and wired to the correct impedance. Connect your amplifier and it's ready to run.

Shipping Included Assembled to order in 2–5 business days. No freight charges at checkout.

$ 899.99

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Financing available — choose Shop Pay Installments at checkout.

What's Included

Proline X Micro Series sealed enclosure — single 10" configuration
Alpine RSW10D4 10" shallow-mount subwoofer pre-installed
Pre-wired 12g OFC speaker wire — wired to 2-ohm (Dual 4-ohm parallel)
Recessed ABS/Carbon Fiber Composite terminal cup — stainless hardware, copper ring terminals
Pre-installed polyfill — acoustically tuned for this enclosure volume
Threaded inserts for secure driver mounting

Amplifier, power wire, and RCA cables not included

Proline X Single 10" Sealed Micro Series System | Loaded with Alpine RSW10D4

$ 899.99

$ 899.99 ~~$ 899.99~~

Enclosure Type Sealed

External Dimensions 21.5" × 14.5" × 5.25"

Net Volume .50cu ft

Tuning Frequency N/A

Cutout Diameter Direct Fit

Front Panel Thickness 1.5

Max Mounting Depth 3.5"

INSTALLER'S TAKE

The RSW10D4 is a step up in output from the TW3-D4 in the same enclosure footprint. The 4" neodymium voice coil at 3.25" depth is Alpine's answer to JL Audio's concentric tube — different engineering path to a similar goal, with a higher power ceiling as a result. In the 0.50 ft³ Micro Series box with polyfill, the RSW10D4 runs deeper and louder than most people expect from a system this size.

The impedance wiring is the same as the TW3-D4 version — Dual 4-ohm wired parallel to 2 ohms, pre-done at the terminal cup. Verify your amplifier is rated for 2-ohm operation. The RSW10D4 needs 450–600W RMS to perform at its capability. An underpowered amp on a 600W driver is a common install mistake — budget for the amplifier accordingly.

At 21.5" × 14.5" × 5.25" the fitment story is identical to the TW3-D4 Micro Series system. Same footprint, same install locations. The decision between the two comes down to power budget and output requirements.

Product Details

The Proline X Single 10" Sealed Micro Series System pairs the Alpine RSW10D4 10" shallow-mount subwoofer with a Proline X Micro Series sealed enclosure built at our Tennessee facility. Net internal volume is 0.50 ft³ — matched to Alpine's published specification for the RSW10D4 in a sealed alignment. At 3.25" mounting depth, the RSW10D4 uses Alpine's Gen2 DD-Linear Magnetic Circuit technology to achieve 20mm of one-way cone excursion and 600W RMS handling — a specification that matches full-size R-Series Alpine drivers despite the shallow profile. The system ships pre-wired to 2 ohms at the terminal cup. Connect your amplifier and it is ready to run.

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 sealed enclosure this compact, panel rigidity is the entire acoustic story. The sealed air volume behind the driver controls cone motion — any flex or air leak directly corrupts that suspension. 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 this specific volume. Nothing to source. Nothing to add. It ships ready to wire.

Shipping is included in the price. At 21.5" wide and 5.25" deep, this is the same compact footprint as the JL TW3 Micro Series system — but with a substantially more powerful driver inside. That cost is built into what you see. No freight line item on your order confirmation. What you see is what you pay.

Enclosure Specifications

Enclosure Type	Sealed — Micro Series
Configuration	Single 10"
Net Volume	0.50 ft³
Tuning Frequency	N/A — Sealed
External Dimensions	21.5" W × 14.5" H × 5.25" D
MDF	Langboard Elite 3/4"
Joinery	V-groove + dado
Terminal Cup	Recessed ABS/Carbon Fiber Composite
Speaker Wire	12g OFC pre-installed
Acoustic Treatment	Polyfill pre-installed
Finish	Plush Black
Vehicle Fitment	Universal

Woofer Details

The Alpine RSW10D4 is a shallow-mount 10" subwoofer from Alpine's R-Series lineup, engineered around Gen2 DD-Linear Magnetic Circuit technology. At 3.25" mounting depth it delivers 20mm of one-way cone excursion and 600W RMS power handling — the same excursion capability as Alpine's full-size R-Series drivers in a package that fits where standard-depth motors cannot. The 4" neodymium voice coil is larger than most shallow-mount competitors at this depth, which is what enables the 600W RMS rating and the 20mm Xmax simultaneously. Alpine's die-cast aluminum frame provides rigid support that eliminates the basket flex common in stamped steel designs at sustained high power. Frequency response extends down to 29Hz in a sealed enclosure. The RSW10D4 is a Dual 4-ohm driver — pre-wired in parallel to 2 ohms at the terminal cup.

Brand + Model	Alpine RSW10D4
Size	10"
RMS Power	600W
Peak Power	1200W
Voice Coil Config	Dual 4-ohm (wired to 2-ohm)
Voice Coil Diameter	4"
Xmax	20mm one-way
Frequency Response	29–200 Hz
Motor	Gen2 DD-Linear Magnetic Circuit — neodymium
Frame	Die-cast aluminum
Mounting Depth	3.25"
Cutout Diameter	9.25"

Why This Combo Works

Alpine RSW10D4 in a Proline X 0.50 ft³ Sealed Micro Series Enclosure

The RSW10D4 is engineered for compact sealed enclosures — Alpine's published recommendation is 0.50 ft³ sealed, which is exactly what this enclosure delivers. Where the JL TW3-D4 in the same box achieves its performance through JL Audio's concentric tube architecture, the RSW10D4 achieves it through Alpine's Gen2 DD-Linear Magnetic Circuit with a neodymium motor. The neodymium magnet structure produces high flux density in a compact footprint, which is how Alpine gets 20mm Xmax and 600W RMS handling at 3.25" mounting depth.

The 600W RMS rating is the key differentiator from the TW3-D4 in the same enclosure. At 50% more rated power with the same Xmax in the same 0.50 ft³ volume, the RSW10D4 produces meaningfully more output headroom. The frequency response extending to 29Hz means the driver reaches lower than most shallow-mount competitors in sealed alignment. The polyfill pre-installed in the enclosure acoustically extends effective volume, improving low-frequency extension at the bottom of that range.

This system suits builds where output and low-end extension matter more than strict SQ accuracy — daily drivers that want real bass from a compact system, or installs where the TW3-D4's 400W ceiling isn't enough. For amplifier power, target 450–600W RMS at 2 ohms. A Class D monoblock rated at 500–750W at 2 ohms gives you the right operating range. Do not underpower this driver — the RSW10D4 performs best when fed adequate, clean power.

Materials

Material

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.

Specifications

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

Internal Bond

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.

Stiffness

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.

Screw Holding

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.

Sourcing

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.