Proline X

Performance Optimized Wedge Sealed Dual 10" Enclosure | Image Dynamics IDMAX10 V.4

Q: Will this enclosure fit both the IDMAX10 V.4 D2 and D4?

Yes. Both coil versions share the same frame, the same 9.646 in cutout and the same 7.598 in mounting depth, so the baffle is cut once and fits either. Acoustically they differ more than usual on this driver: Qtc 1.012 on the D2 against 1.095 on the D4, because Image Dynamics publishes a different Vas for each coil.

Q: Why 0.75 cubic feet net per driver?

That is Image Dynamics' published Universal sealed airspace for the IDMAX10 V.4. Gross is 0.89 cu ft per chamber before the driver's 0.1098 cu ft displacement. It produces Qtc 1.012 to 1.095, a high-Q sealed alignment rather than a flat one, which is what this driver's own Qts of 0.61 to 0.66 allows.

Q: What amplifier power should I run, and what impedance?

The IDMAX10 V.4 is rated 500 watts RMS each, so 1000 across the pair. On impedance: a D2 gives 4 ohms series, 1 ohm parallel and a D4 gives 8 ohms series, 2 ohms parallel. With two drivers the parallel combinations get very low, 0.5 ohms on a D2 pair, so series wiring is usually the answer. Aim for roughly 700 to 1000 watts at the final wired impedance.

Q: How does a wedge enclosure improve the sound in a trunk installation?

The angled seat-side face matches the roughly 20 degree lean of a factory rear seat, so the cabinet sits flat against it instead of leaving a wasted triangle. The vertical trunk-lid-side face carries the driver, firing rearward into the trunk cavity, which acts as an acoustic extension and smooths the presentation into the cabin.

Q: Why is the front baffle double-layered?

The baffle is two bonded 3/4 inch sheets, 1.5 inches through. A subwoofer pushes as hard against its mounting surface as it does against the air, and a single 3/4 inch panel flexes under that load. With 19 mm of one-way travel and 1000 watts on tap, that matters here more than it does on a shallow driver.

Q: What is the expected low-frequency extension?

Anechoic F3 lands between 34.0 and 35.0 Hz depending on coil, at Qtc 1.012 to 1.095. That is a peaked alignment, not a flat one: there is a rise around 45 Hz before the rolloff. Those figures exclude cabin gain, which in most vehicles adds meaningful output below 40 Hz.

Q: Do I need to add polyfill or damping?

No. Polyfill is already installed as a light wall lining to control internal reflections, and the quantity is chosen so it does not change the acoustic volume. Do not add more. Packing a sealed box with fill makes it behave as though it were larger, which on this driver would push Qtc the wrong way for no gain in extension.

Q: Are the drivers included?

No. This is an enclosure only. You receive the cabinet finished in plush black carpet, with threaded inserts at both driver positions, stainless machine screws, one side-mounted pre-wired terminal cup and the polyfill lining already installed.

SKU: PO 10D-S W IDMAX BB

QUICK SPECS

Best For: Dual Image Dynamics IDMAX10 V.4 Trunk-Fit Builds
Net Volume: 0.75 cu ft per driver (0.89 cu ft Gross)
Alignment: Qtc 1.01 (D2) / 1.09 (D4), F3 34.0 to 35.0 Hz
Driver Match: IDMAX10 V.4 (D2 or D4)
Watch the impedance: a D2 pair parallels to 0.5 ohms
Construction: Dual Chamber | Rear-Firing Wedge | V-Groove/Dado | Double 1.5" Baffle | Threaded Inserts

Shipping Included No freight charges at checkout. What you see is what you pay.

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.

$ 329.99

Acrylic Insert Color

In Stock and Ready to Ship

Financing available. Choose Shop Pay Installments at checkout.

Performance Optimized Wedge Sealed Dual 10" Enclosure | Image Dynamics IDMAX10 V.4

Enclosure Type Sealed

External Dimensions 28.35" W x 15" H x 14.50" D at base tapering to 9.04" D at top

Net Volume 1.50cu ft

Tuning Frequency N/A (Sealed)

Cutout Diameter Direct Fit

Front Panel Thickness 1.5"

Max Mounting Depth Direct Fit

INSTALLER'S TAKE

Read the alignment before you read anything else. This is a high-Q sealed box: Qtc 1.01 on the D2 and 1.09 on the D4. That is Image Dynamics' own recommended airspace doing what it does, not a compromise we made. The IDMAX publishes a high Qts, 0.61 and 0.66 on the two coils, and a sealed system Q can never go below the driver's own Qts no matter how big you build.

What that buys you is a rise around 45 Hz and a half power point of 34.0 to 35.0 Hz anechoic, which is lower than a flatter box this size would reach. In a vehicle the cabin does the rest below that. If you want a damped, dry alignment out of an IDMAX, no cabinet that fits a trunk will give it to you.

Check the impedance before you buy the amplifier. A D2 pair parallels to 0.5 ohms and a D4 pair to 1 ohm. Series is usually the answer here.

Measure the base depth. This cabinet is 14.50 inches deep at the trunk floor, 9.04 at the top, and 28.35 wide. The floor dimension is what decides whether it goes in.

Product Details

Performance Optimized Wedge | Image Dynamics IDMAX10 V.4

Dual 10" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design

0.75 ft3 Net Per Driver0.89 ft3 Gross Per ChamberQtc 1.01 to 1.09Rear-Firing Wedge28.35" x 15" x 9.04/14.50"Built in Tennessee

The Image Dynamics IDMAX10 V.4 in a Dual-Driver Sealed Wedge

A 3 inch dual voice coil on a bolt-on field-replaceable basket, 19 mm of one-way travel and a 500 watt RMS rating. The alignment below follows from Image Dynamics' own published Thiele-Small parameters, which they give separately for each coil version.

0.75 cubic feet net per driver is Image Dynamics' published Universal sealed airspace for the IDMAX10 V.4, and this cabinet is cut to it exactly.

Two Fully Separate Chambers

A full divider runs floor to ceiling and front to back, giving each IDMAX10 V.4 its own sealed chamber of 0.89 cu ft gross. Neither cone loads against the other, so the pair stays predictable under hard excursion instead of modulating each other's air load.

Trunk-Load Wedge Design Explained

The IDMAX10 V.4 mounts on the vertical trunk-lid-side face and fires rearward into the trunk cavity.

Seat-Side Face Matches Seat Lean

Angled face matches the roughly 20 degree factory seat lean.

Trunk-Lid-Side Face Fires the Woofer

Vertical baffle, cone firing rearward into the trunk cavity.

Trunk Cavity Loading

The trunk acts as an acoustic extension for a smoother presentation.

Preserves Trunk Cargo Space

The wedge tucks against the seat back and the space in front stays usable.

Engineered for the Image Dynamics IDMAX10 V.4

0.75 cubic feet net per driver is Image Dynamics' published Universal sealed airspace for the IDMAX10 V.4, and this cabinet is cut to it exactly.

That airspace produces a high-Q sealed alignment, Qtc 1.01 to 1.09 depending on coil. It is not a Butterworth box and it is not trying to be. Reaching Qtc 0.707 on the D2 coil would take about 3.8 cubic feet, roughly 5 times this cabinet, and the extension gained would be under two hertz. What the higher Q buys is a rise around 45 Hz and a half-power point of 34.0 to 35.0 Hz anechoic, which is lower than a flatter alignment of the same size would reach. In a vehicle, cabin gain works on everything below that.

Alignment Numbers

D2 Qtc 1.012 · D4 Qtc 1.095 · fc 44.8 Hz · F3 34.0 to 35.0 Hz anechoic

Mounting Geometry

Vertical baffle CNC cut to 9.646 in. Driver mounting depth 7.598 in. Threaded inserts pressed into the baffle backside at every mounting location.

Performance Series Construction, Driver-Specific Tuning

Langboard Elite MDF

Premium 3/4 in MDF throughout.

V-Groove and Dado Joinery

CNC cut V-grooves at every panel intersection, sides and divider seated in dados.

Double-Layer 1.5" Front Baffle

Two bonded 3/4 in MDF sheets at the driver face.

Pre-Wired Terminal Cup

Proline X ABS and carbon fiber composite, 12 gauge OFC pre-wired to both driver positions.

Wiring the Image Dynamics IDMAX10 V.4 Pair to Your Amplifier

The IDMAX10 V.4 ships as a D2 or a D4. A pair of D2 coils gives 0.5 ohms with all four in parallel, which almost nothing is stable into, and a pair of D4 gives 1 ohm. Sensible targets are 1 or 2 ohms on a D2 pair and 2 or 4 ohms on a D4 pair. Work the wiring out before you buy the amplifier, not after.

Power handling is 1000 watts RMS total across the pair. Aim for roughly 700 to 1000 watts at the final wired impedance.

Built in Tennessee, Backed by Audio Intensity

Cut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet. 1 year limited warranty. Enclosure only, the Image Dynamics IDMAX10 V.4 drivers are purchased separately. Call or text 931-563-5151.

Image Dynamics IDMAX10 V.4 Dual: Built to Image Dynamics' Own Airspace

0.75 cubic feet net per driver at Qtc 1.01 to 1.09, cut direct fit and built to order in Tennessee.

Specifications

Specification	Value
Series	Proline X Performance Optimized Wedge
Compatible Driver	Image Dynamics IDMAX10 V.4, quantity 2. Direct fit, either coil version
Configuration	Dual 10 inch, dual chamber sealed wedge
Mounting Position	Trunk or cargo area, tall face against the rear seat back
Firing Direction	Rearward into the trunk. Not a down fire design, no feet included
External Width	28.35 in
External Height	15 in at the seat face
External Depth	14.50 in at the base, tapering to 9.04 in at the top
Internal Volume, Gross	1.77 cu ft total, 0.89 per chamber
Internal Volume, Net Acoustic	1.50 cu ft total, 0.75 per driver
Alignment	Qtc 1.012 (D2) / 1.095 (D4), fc 44.8 Hz, F3 34.0 to 35.0 Hz anechoic
Driver Cutout	9.646 in
Driver Mounting Depth	7.598 in required
Power Handling	1000 watts RMS total across the pair
Impedance Options	D2: 4 ohms series, 1 ohm parallel. D4: 8 ohms series, 2 ohms parallel
Material	Langboard Elite MDF
Construction	CNC cut, V-groove and dado joinery
Panel Thickness	0.75 in
Front Baffle	1.5 in, double baffle
Internal Bracing	Full chamber divider
Driver Mounting	Threaded inserts at every mounting location, stainless machine screws included
Terminal Cups	One Proline X ABS and carbon fiber composite, side mounted, pre wired 12 gauge OFC
Damping	Light polyfill wall lining, does not alter acoustic volume
Carpet	Plush black
Weight	41.1 lb
Warranty	1 Year Limited
Built In	Tullahoma, Tennessee

Performance Graphs

Net airspace

0.75

cu ft per chamber

System Qtc

1.01–1.09

sealed

Half power

34.0–35.0

Hz · F3

Xmax at

654

W RMS · no filter

With 25 Hz subsonic

692

W RMS · +6%

Amplifier

500

W RMS recommended

This enclosure holds 0.75 cu ft net per chamber. In it the Image Dynamics IDMAX10 V.4 runs a system Qtc of 1.01–1.09 with half power at 34.0–35.0 Hz, and the cone reaches its 19.0 mm travel limit at 654 W, above the driver’s 500 W thermal rating, so heat stops you before travel does. Run a subsonic filter at 25 Hz and that becomes 692 W — +38 W, or 6 percent more power for the same 19.0 mm of travel.

01Is it a sealed driver?

Efficiency bandwidth product places the motor before anything else is decided.

EBP = Fs ÷ Qes = 35.1–38.4

D2 · EBP 38.4D4 · EBP 35.1

EBP under 50 means a motor that wants a sealed load. The IDMAX10 sits at 35.1–38.4, inside that band, which is why this is a sealed build rather than a ported one.

02What the box does to it

0.75 cu ft against a 37.2 L Vas.

α = Vas ÷ Vb = 1.75 · Fc = Fs√(α+1) = 45 Hz · Qtc = 1.01–1.09

D2 · Qtc 1.01, Fc 45 Hz, F3 35.0 HzD4 · Qtc 1.09, Fc 45 Hz, F3 34.0 Hz

The box lifts resonance from 27.0 Hz free-air to 45 Hz and half power lands at 34.0–35.0 Hz, anechoic, before any cabin gain. Image Dynamics publishes a different Vas for the D2 and the D4. A cone and suspension are shared across coil variants, so both cannot be right. The figure here is the row whose moving mass reproduces its own free-air resonance, applied to both coils.

03The watts that reach Xmax (in this enclosure)

Travel scales with the square root of power, so there is one wattage that puts the cone exactly on 19.0 mm — and a bigger one once a subsonic filter stops it wasting travel below the passband.

P_Xmax = 654–668 W unfiltered → 692–722 W with a 25 Hz subsonic

D2 · 668 W, no filterD4 · 654 W, no filterD2 · 722 W with subsonic at 25 Hz, 24 dB/octD4 · 692 W with subsonic at 25 Hz, 24 dB/octXmax 19.0 mm one-way

Every trace touches the limit and no further, because each is drawn at the exact power that puts that coil on 19.0 mm. Unfiltered that is 654 W, reached first at 34 Hz. It sits above the 500 W the driver can take thermally, so the voice coil gives up before the suspension does. The dashed traces are the same driver behind a subsonic filter at 25 Hz, 24 dB/oct: stopping the cone wasting travel below the passband lets it take 692 W before hitting the same 19.0 mm. That is 6 percent more amplifier for the price of one filter setting.

Param	Value	Unit	Note
Fs	27.00	Hz	free-air resonance
Qts	0.610 / 0.660		D2 / D4
Vas	37.20 / 37.20	L	equivalent compliance
Sd	380.0	cm²	effective piston area
Xmax	19	mm	one-way linear travel, bolt-on field-replaceable basket
Pe	500	W	continuous RMS
SPL	82.0	dB	1 W / 1 m, derived from T/S

Driver parameters as published by loudspeakerdatabase.com. Curves computed against this enclosure’s actual net airspace.

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, 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 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.