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Proline X
Professional Series Sealed 12" Enclosure | Image Dynamics IDMAX12 V4
SKU: Pro12-S IDMAX
QUICK SPECS
- Alignment: Sealed, 1.100 cu ft net. Qtc 1.15, Fc 47.4 Hz, F3 35.3 Hz
- Driver: Image Dynamics IDMAX12 V4 D2, 500 W RMS
- Build: Front-firing standard box, triple 2.25" baffle with the woofer flush-mounted in the outer layer, Image Dynamics logo acrylic, dado joinery, polyfill included
- Cabinet: 24.00" W x 14.00" H x 10.00" D, 30 lb
Shipping Included
No freight charges at checkout on US orders. International orders are quoted live carrier rates at checkout.
Built in Tennessee
CNC cut from 3/4" Langboard Elite MDF. V-groove and dado joinery.
Advanced Terminal Cup
Built in-house. ABS/Carbon Fiber. Stainless steel hardware. Copper ring terminals.
$ 280.99
Financing available. Choose Shop Pay Installments at checkout.
Professional Series Sealed 12" Enclosure | Image Dynamics IDMAX12 V4
Regular price
$ 280.99
Sale price
$ 280.99
Regular price
Unit price
Enclosure Type
Sealed
External Dimensions
24.00" W x 14.00" H x 10.00" D
Gross Volume
1.14 cu ft
Net Volume
1.10 cu ft
Tuning Frequency
N/A (Sealed)
Port Area
N/A
Cutout Diameter
Direct Fit
Weight
30 lbs
Front Panel Thickness
2.25
Max Mounting Depth
Direct Fit
INSTALLER'S TAKE
Product Details
Enclosure Specifications
Woofer Details
Materials
Related Video
Professional Series Sealed 12" Enclosure | Image Dynamics IDMAX12 V4
The IDMAX12 V4 shares the IDMAX10's tight suspension and heavy motor, scaled up, and Image Dynamics again recommend a sealed box over a ported one. This cabinet holds 1.10 cubic feet net, landing the D2 coil at a Qtc of 1.15 and an Fc of 47.4 Hz. It is the single-driver sealed box in the professional Image Dynamics line sized for the larger frame.
Sealed
Qtc 1.15
F3 35.3 Hz
Cut for the Image Dynamics IDMAX12 V4
Built in Tennessee
Why this driver is sealed
The IDMAX12 V4 shares the IDMAX10's tight suspension and heavy motor, scaled up, and Image Dynamics again recommend a sealed box over a ported one. This cabinet holds 1.10 cubic feet net, landing the D2 coil at a Qtc of 1.15 and an Fc of 47.4 Hz. It is the single-driver sealed box in the professional Image Dynamics line sized for the larger frame.
A Qtc of 1.15 is a step tighter than the IDMAX10's own alignment: still a controlled, punchy sealed box rather than a deep-reaching one. Image Dynamics' own manual lists three sealed volumes for the IDMAX12, a Compact box at 44 Hz, a Universal box at 40 Hz, and an Audiophile box at 37 Hz, all gross including the driver's displacement. This cabinet's 1.10 cubic feet net works out to about one and a quarter cubic feet gross, close to their Universal figure. F3 on this box comes out to 35.3 Hz.
The alignment
1.100 cu ft net at Qtc 1.15, Fc 47.4 Hz, F3 35.3 Hz.
Polyfill is included, sized to the chamber. It is part of the alignment above, not packing material, so it should not be removed.
The cabinet
24.00" W x 14.00" H x 10.00" D external. It ships as a UPS parcel; the price includes shipping in the 48 states.
This is our single-twelve sealed envelope for one IDMAX12, sized to the driver's larger frame and motor depth.
T/S for the IDMAX12 D2 come from loudspeakerdatabase.com's mirror of Image Dynamics' own coil-specific publication; Vas here is derived from the other T/S rather than a number Image Dynamics print directly. Scott's Q2 catalog sheet lists this cabinet at 23 by 14 by 10 inches; the store's 24 by 14 by 10 is what actually shipped and is the figure used here. Image Dynamics recommend a sealed box for the IDMAX12, and this cabinet is exactly that.
| Series | Proline X Professional |
| Driver-Specific Fitment | Image Dynamics IDMAX12 V4 D2 (Dual 2 Ohm) |
| Enclosure Type | Sealed | Front-Firing Standard Box |
| External Width | 24.00 Inches |
| External Height | 14.00 Inches |
| External Depth | 10.00 Inches |
| Internal Volume (Net) | 1.100 Cubic Feet |
| Alignment | Sealed | Qtc 1.15 | Fc 47.4 Hz | F3 35.3 Hz |
| Damping | Polyfill Included, Sized To The Chamber |
| Driver Fs | 26.00 Hz |
| Driver Qts | 0.630 |
| Driver Qes / Qms | 0.730 / 4.720 |
| Driver Vas | 72.200 Liters / 2.550 Cubic Feet |
| Driver Sd | 547.0 Square Centimeters |
| Driver Mms | 214.00 g |
| Driver BL | 12.70 |
| Driver Re | 3.4 Ohm |
| Driver Xmax | 19mm (One-Way) |
| Driver Power Handling | 500 Watts RMS |
| Driver Overall Diameter | 12.382 Inches (Image Dynamics Spec) |
| Mounting Depth Required | 8.071 Inches (Image Dynamics Spec) |
| Cutout Diameter | 11.024 Inches (Image Dynamics Spec) |
| Flush Mount Recess | 13.375 Inches In The Outer Layer |
| Voice Coil Configuration | Dual 2 Ohm |
| Material | Langboard Elite 3/4" MDF |
| Joinery | Dado Joinery (CNC-Cut), Flat Panels |
| Front Baffle Construction | Triple-Layer 2.25" MDF | Woofer Flush-Mounted In The Outer Layer |
| Baffle Layers | 3 |
| Acrylic | Glossy Black Image Dynamics Logo Insert, Outer Layer, Standard |
| Terminal Cup | Proline X ABS/Carbon Fiber Composite | Back Panel, Terminal-Cup Side | 12g OFC Pre-Wired |
| Carpet Finish | Plush Black |
| Weight | 30 lb |
| Shipping | UPS Ground Parcel, Included In The 48 States |
| Bundle Options | Enclosure Only (Bring Your Own Image Dynamics IDMAX12 V4) |
| Warranty | 2-Year Limited (Enclosure) |
| Manufactured | Tullahoma, Tennessee, USA |
The Image Dynamics IDMAX 12 V4 is the flagship 12" driver in the IDMAX lineup, a high-excursion, SQ-focused subwoofer built for competitors and serious enthusiasts who need accurate, controlled low-frequency output at sustained high power. It is one of the few 12" drivers on the market that genuinely rewards a correctly engineered enclosure, which is exactly why we built this Professional Series box around it. We carry the IDMAX 12 V4 in both D2 and D4 configurations. If you need the driver to go with this enclosure, you can find it here.
| Driver | Image Dynamics IDMAX 12 V4 |
| Size | 12" |
| RMS Power | 500W |
| Peak Power | 1000W |
| Recommended Power Range | 200–1000W |
| Impedance Options | Dual 2Ω / Dual 4Ω |
| Fs (Resonant Frequency) | 27.8 Hz |
| Qts | 0.58 |
| Vas | 72.2 L |
| Xmax (One Way) | 19.5mm |
| Sensitivity | 85.2 dB (1W/1m) |
| Cutout Diameter | 280mm (11.02") |
| Mounting Depth | 207mm (8.15") |
| Recommended Enclosure | Sealed, 0.65–1.8 ft³ |
| Cone Material | Pressed Paper Composite |
| Surround | Parabolic EPDM Rubber |
Material
Built From a Spec Sheet, Not a Sales Sheet
Every Proline X Professional 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, its 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 Professional 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.
Featured Video
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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Economy Series
Value Driven - Standard Output
Performance Series
High Output - Universal Ported & Sealed
Performance Optimized Series
Precision Tuned - Brand Specific Geometry
Performance Wedge Series
Angled Back - Truck & Hatchback Ready
Professional Series
Competition Grade - Double Baffle High SPL
Micro Series
Compact Sealed - Small Footprint Efficiency
Down Fire Series
Under Seat - Cargo Safe Down-Firing
Vehicle Specific Series
OEM Fitment - Stealth Truck & SUV Solutions
Loaded Series
Plug & Play - Subwoofer + Box Bundles
