Image Dynamics IDMAX 12 Loaded Subwoofer Enclosure (Sealed)
Image Dynamics IDMAX 12 Loaded Subwoofer Enclosure (Sealed)Image Dynamics IDMAX 12 Loaded Subwoofer Enclosure (Sealed)Image Dynamics IDMAX 12 Loaded Subwoofer Enclosure (Sealed)

Loaded Series · Datasheet

Proline-X Sealed 12" Enclosure – Loaded with Image Dynamics IDMAX 12 Single 12" Sealed enclosure

Net volume
1.1 ft³ Net
Tuning
N/A: Sealed
Max mounting depth
~8.25"
Buy at Audio IntensityFactory-direct, ships from Tullahoma
  • Best For: High output builds that still have to sound right
  • Configuration: Single 12" Sealed: loaded
  • Volume: 1.1 ft³ Net
  • Tuning: N/A, Sealed
  • Sonic Character: Controlled at volume, SPL capable, SQ intent

Spec of record

Technical specifications

EnclosureProline X sealed, loaded
DriverImage Dynamics IDMAX12 V4, pre-installed
Voice CoilDual 2 ohm or Dual 4 ohm
Enclosure TypeSealed
Net Internal Volume1.1 ft³ Net
Tuning FrequencyN/A: Sealed
MaterialLangboard Elite MDF, 3/4" (18mm)
Driver Mounting Depth~8.25"
Terminal CupProline X ABS/Carbon Fiber, recessed mount, stainless hardware, copper ring terminals
WiringPre-wired 12g OFC speaker wire
PolyfillInstalled
BuiltTullahoma, Tennessee

Modelled response

Performance in this enclosure

Net airspace
1.10
cu ft per chamber
System Qtc
1.14–1.31
sealed
Half power
32.4–35.4
Hz · F3
Xmax at
805
W RMS · no filter
With 25 Hz subsonic
831
W RMS · +3%
Amplifier
500
W RMS recommended
This enclosure holds 1.10 cu ft net per chamber. In it the Image Dynamics IDMAX12 V4 runs a system Qtc of 1.14–1.31 with half power at 32.4–35.4 Hz, and the cone reaches its 19.0 mm travel limit at 805 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 831 W — +25 W, or 3 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 = 29.2–35.7
SEALED 0–50 TRANSITION 50–100 PORTED 100–150 0 50 100 150 D2 35.7 D4 29.2
D2 · EBP 35.7D4 · EBP 29.2
EBP under 50 means a motor that wants a sealed load. The IDMAX12 V4 sits at 29.2–35.7, inside that band, which is why this is a sealed build rather than a ported one.

02What the box does to it

1.10 cu ft against a 71.9 L Vas.

α = Vas ÷ Vb = 2.31  ·  Fc = Fs√(α+1) = 45–47 Hz  ·  Qtc = 1.14–1.31
20 30 50 70 100 150 200 +6 +0 -6 -12 -18 -24 FREQUENCY · Hz LEVEL · dB −3 dB
D2 · Qtc 1.14, Fc 47 Hz, F3 35.4 HzD4 · Qtc 1.31, Fc 45 Hz, F3 32.4 Hz
The box lifts resonance from 26.0 Hz free-air to 45–47 Hz and half power lands at 32.4–35.4 Hz, anechoic, before any cabin gain. This system is offered in both coil variants, so both are plotted. They do not load the same box the same way.

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 = 805–872 W unfiltered  →  831–903 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 805 W reaches Xmax here
D2 · 872 W, no filterD4 · 805 W, no filterD2 · 903 W with subsonic at 25 Hz, 24 dB/octD4 · 831 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 805 W, reached first at 38 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 831 W before hitting the same 19.0 mm. That is 3 percent more amplifier for the price of one filter setting.
ParamValueUnitNote
Fs26.00Hzfree-air resonance
Qts0.626 / 0.758D2 / D4
Vas71.89 / 62.44Lequivalent compliance
Sd547.4cm²effective piston area
Xmax19mmone-way linear travel
Pe500Wcontinuous RMS
SPL84.2dB1 W / 1 m, derived from T/S

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

From the shop floor

Installer's take

Check your depth. The IDMAX12 needs roughly 8.25 inches of mounting depth, which rules out most behind seat and under seat locations before you start. This is a trunk or cargo area driver. If the space is depth limited you want a shallow mount 12 such as the Wavtech thinPRO 12 instead, and you should decide that before ordering rather than after.

Give it real power. Image Dynamics recommend 200 to 1000 watts and the driver comes alive in the upper half of that range. A small amplifier driven into clipping will sound worse and be harder on the voice coil than a larger amplifier running comfortably. This is one of the few drivers where the usual advice about not overpowering matters less than the advice about not underpowering.

The field replaceable cone assembly is worth knowing about before you ever need it. Sixteen screws and alignment shims, no glue and no press. A damaged cone means a rebuild rather than a replacement driver, which is unusual at any price and is a large part of why the IDMAX holds its value.

How it's built

Construction

Image Dynamics IDMAX12 V4 12 inch Subwoofer

Image Dynamics IDMAX12 V4 12 inch Subwoofer

<table style="width:100%; border-collapse:collapse; text-align:left;"> <thead> <tr> <th style="border:1px solid #ccc; padding:8px;">Model</th> <th style="border:1px solid #ccc; padding:8px;">IDMAX12D2</th> <th style="border:1px solid #ccc; padding:8px;">IDMAX12D4</th> </tr> </thead> <tbody> <tr> <td style="border:1px solid #ccc; padding:8px;">VC Impedance (ohms)</td> <td style="border:1px solid #ccc; padding:8px;">2Ω + 2Ω</td> <td style="border:1px solid #ccc; padding:8px;">4Ω + 4Ω</td> </tr> </tbody> </table>

Professional Series Enclosure | Image Dynamics IDMAX 12

Professional Series Enclosure | Image Dynamics IDMAX 12

Technical Details

  • Subwoofer Compatibility: Image Dynamics IDMAX 12"
  • Design Type: Sealed enclosure for tight, accurate bass response
  • Material: Premium 3/4" Medium-Density Fiberboard (MDF)
  • Internal Volume: 1.1 cubic feet, optimized for the IDMAX 12"
  • Dimensions: 24” W x 12” H x 10” D
  • Weight: 48 lbs
  • Finish: Automotive-grade plush black carpet for durability and a professional look
  • Resonance Control: Designed to minimize vibrations and distortions
  • Terminal Cup: Pre-installed heavy-duty push terminals for secure wiring connections
  • Mounting Depth: 8 inches
  • Portability: Compact and easy to install, with universal fit for most vehicles
Acoustic Precision and Sound Isolation

Acoustic Precision and Sound Isolation

Tight, Focused Sound

The sealed enclosure design keeps the bass response tight and controlled. Unlike vented designs, this approach avoids excessive air movement that can muddy sound clarity. The result is a balanced bass output that integrates seamlessly with the rest of the audio system. This ensures users experience a cohesive and immersive soundstage.

Professional Appearance

Professional Appearance

Sleek Design

The enclosure’s clean lines and carpet finish offer a professional, polished look. This aesthetic complements most vehicle interiors, adding a touch of sophistication to any setup. It’s designed to appeal to users who value both form and function. The appearance reflects the high-quality construction and engineering.

Before you order

Questions

What comes in this system?

A Proline X sealed enclosure at 1.1 cubic feet net, with the Image Dynamics IDMAX12 V4 already mounted, gasketed and sealed against the baffle. Prewired with 12 gauge OFC to a recessed Proline X terminal cup, polyfill installed. An amplifier, power wire and RCA cables are not included.

How much amplifier power does the IDMAX12 need?

Target 600 to 1000 watts RMS at your final impedance. Image Dynamics recommend 200 to 1000 watts and rate the driver conservatively. Underpowering is the more common mistake here than overpowering. A small amplifier driven into clipping sounds worse and is harder on the voice coil than a larger amplifier running comfortably below its limit.

How does a 1000 watt driver work in a 1.1 cubic foot box?

Because in a sealed cabinet the air spring restricts cone travel, so the driver reaches its thermal limit before it reaches mechanical Xmax at rated power. The enclosure is doing the limiting rather than the motor. High power handling and moderate sealed volume are not in tension the way people assume, and you can see it for yourself by running the numbers through our Xmax calculator.

Will this fit behind a seat?

No. The IDMAX12 needs roughly 8.25 inches of mounting depth, which rules out behind seat and under seat locations. This is a trunk or cargo area driver. If your space is depth limited you want a shallow mount 12 such as the Wavtech thinPRO 12, which fits in 3 inches of mounting depth.

IDMAX10 or IDMAX12?

Same motor, same Xmax, same power rating. The difference is cone area: 547 square centimetres on the 12 against 394 on the 10, which is nearly 40 percent more air moved at the same excursion. If you have the space, the 12 is the more capable driver. The 10 exists for builds where the 12 will not physically fit or where the smaller cabinet matters more than the extra output.

Sealed or ported for an IDMAX?

Sealed is what the IDMAX was designed around. The whole point of the driver is high output that stays composed, and a sealed box is what keeps it composed. Ported will give you more output near the tuning frequency if raw SPL is the goal, and the IDMAX performs well ported, but you trade away the control that is the reason to choose this driver over a dedicated SPL sub.

What does field replaceable cone assembly mean?

Sixteen screws and a set of alignment shims, no glue and no press. If you damage a cone the driver is rebuildable rather than scrap. That is unusual at any price point and is a large part of why the IDMAX holds its value on the used market.

What is the warranty on this system?

The enclosure carries a limited warranty on craftsmanship and materials from Audio Intensity. The Image Dynamics IDMAX12 V4 carries its own 1 year manufacturer warranty separately, handled through Image Dynamics.

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