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Performance Optimized · Datasheet

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

Net volume
1.50 cu ft total, 0.75 per driver
Max mounting depth
7.598 in required
Cutout
9.646 in
External dimensions
28.35 in W × 15 in at the seat face H × 14.50 in at the base D
Front baffle
1.5 in, double baffle
Buy at Audio Intensity
  • 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

Technical specifications

SpecificationValue
SeriesProline X Performance Optimized Wedge
Compatible DriverImage Dynamics IDMAX10 V.4, quantity 2. Direct fit, either coil version
ConfigurationDual 10 inch, dual chamber sealed wedge
Mounting PositionTrunk or cargo area, tall face against the rear seat back
Firing DirectionRearward into the trunk. Not a down fire design, no feet included
External Width28.35 in
External Height15 in at the seat face
External Depth14.50 in at the base, tapering to 9.04 in at the top
Internal Volume, Gross1.77 cu ft total, 0.89 per chamber
Internal Volume, Net Acoustic1.50 cu ft total, 0.75 per driver
AlignmentQtc 1.012 (D2) / 1.095 (D4), fc 44.8 Hz, F3 34.0 to 35.0 Hz anechoic
Driver Cutout9.646 in
Driver Mounting Depth7.598 in required
Power Handling1000 watts RMS total across the pair
Impedance OptionsD2: 4 ohms series, 1 ohm parallel. D4: 8 ohms series, 2 ohms parallel
MaterialLangboard Elite MDF
ConstructionCNC cut, V-groove and dado joinery
Panel Thickness0.75 in
Front Baffle1.5 in, double baffle
Internal BracingFull chamber divider
Driver MountingThreaded inserts at every mounting location, stainless machine screws included
Terminal CupsOne Proline X ABS and carbon fiber composite, side mounted, pre wired 12 gauge OFC
DampingLight polyfill wall lining, does not alter acoustic volume
CarpetPlush black
Weight41.1 lb
Warranty1 Year Limited
Built InTullahoma, Tennessee

Performance in this enclosure

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
SEALED 0–50 TRANSITION 50–100 PORTED 100–150 0 50 100 150 D2 38.4 D4 35.1
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
20 30 50 70 100 150 200 +6 +0 -6 -12 -18 -24 FREQUENCY · Hz LEVEL · dB −3 dB
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.

PXmax = 654–668 W unfiltered  →  692–722 W with a 25 Hz subsonic
20 30 50 70 100 150 200 0 4 8 12 16 20 24 FREQUENCY · Hz CONE TRAVEL · mm PAST LINEAR TRAVEL · Xmax 19.0 mm 654 W reaches Xmax here
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.
ParamValueUnitNote
Fs27.00Hzfree-air resonance
Qts0.610 / 0.660D2 / D4
Vas37.20 / 37.20Lequivalent compliance
Sd380.0cm²effective piston area
Xmax19mmone-way linear travel, bolt-on field-replaceable basket
Pe500Wcontinuous RMS
SPL82.0dB1 W / 1 m, derived from T/S

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

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.

Questions

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.

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.

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.

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.

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.

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.

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.

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.

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