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Proline X PO 10-S DF GT2 sealed down fire enclosure, front panel on 1.75 inch feet, 30 by 6.4 inches.
Proline X PO 10-S DF GT2 sealed down fire enclosure, end panel with recessed terminal cup, 15 by 6.4 inches.

Performance Optimized · Datasheet

Performance Optimized Down Fire Sealed 10" Enclosure Audiomobile GT2 2010 · Single 10" Sealed enclosure

Net volume
0.80 cu ft after the brace and the driver displacement
Max mounting depth
4.25 in required, 1.42 in clearance above the motor
External dimensions
30.00 in W × 6.42 in in the down fire position H × 15.00 in D
Front baffle
1.5 in double baffle, outer layer machined as a flush recess
Buy at Audio IntensityFactory-direct, ships from Tullahoma
Audiomobile GT2Buy at Audio Intensity
  • Alignment: 0.80 cu ft net, Qtc 0.96, F3 34.6 Hz
  • Driver: Audiomobile GT2 2010 (3 ohm), 400 W RMS, 11.9 mm Xmax, 4.25 in mounting depth
  • Standoffs: Included, 1.75 in, shipped uninstalled. Installed height near 8.17 in
  • Cabinet: 30.00"W x 15.00"D x 6.42"H in down fire position, excludes standoffs, square corners

Spec of record

Technical specifications

SpecificationValue
SeriesProline X Performance Optimized Down Fire
Compatible DriverAudiomobile GT2 2010, quantity 1. Direct fit
ConfigurationSingle 10 inch, sealed down fire
Mounting PositionTrunk or cargo floor, baffle facing down on standoffs
Firing DirectionDownward. Feet ship uninstalled, so front or up firing is also possible
External Width30.00 in
External Depth15.00 in
External Height6.42 in in the down fire position, excludes standoffs
Installed Height8.17 in including the 1.75 in standoff
Internal Volume, Gross0.90 cu ft
Internal Volume, Net Acoustic0.80 cu ft after the brace and the driver displacement
Height Set ByAirspace; clearance alone would allow a lower cabinet
Driver Mounting Depth4.25 in required, 1.42 in clearance above the motor
Floor Slot0.94 times the cone area at the 1.75 in standoff
AlignmentQtc 0.958, fc 43.2 Hz, F3 34.6 Hz anechoic
Woofer Opening9.2 in
Frame Outer Diameter10.65 in
Bolt CircleNot printed by Audiomobile; threaded insert kit included
Driver Displacement0.088 cu ft, estimated; Audiomobile publishes none
Fs / Qts / Vas27.5 Hz / 0.61 / 33.2 L, Audiomobile spec (Qes 0.64, Qms 7.1)
Moving Mass187 g
Xmax11.9 mm one way
Driver Power Handling400 W RMS
Wiring OptionsThe GT2 2010 has a single 3 ohm coil (2.8 ohms DC), so one driver presents 3 ohms to a mono amplifier.
MaterialLangboard Elite MDF
ConstructionCNC cut, V-groove and dado joinery, square corners
Panel Thickness0.75 in
Front Baffle1.5 in double baffle, outer layer machined as a flush recess
Internal BracingWindowed brace, dadoed to the shell
Driver MountingThreaded insert kit included, NOT pre-installed: no published bolt circle
Terminal CupsOne Proline X ABS and carbon fiber composite, side mounted, pre wired 12 gauge OFC
StandoffsIncluded, 1.75 in, shipped uninstalled
DampingLight polyfill wall lining, does not alter acoustic volume
CarpetPlush black
Shipping Weight38 lb
Warranty1 Year Limited
Built InTullahoma, Tennessee

Modelled response

Performance in this enclosure

Net airspace
0.80
cu ft
System Qtc
0.96
sealed
Half power
34.6
Hz · F3
Xmax at
194
W RMS · no filter
With 25 Hz subsonic
218
W RMS · +12%
Amplifier
400
W RMS recommended
This enclosure holds 0.80 cu ft net . In it the Audiomobile GT2 2010 runs a system Qtc of 0.96 with half power at 34.6 Hz, and the cone reaches its 11.9 mm travel limit at 194 W, below the driver’s 400 W thermal rating, so travel is what stops you here, not heat. Run a subsonic filter at 25 Hz and that becomes 218 W — +24 W, or 12 percent more power for the same 11.9 mm of travel.

01Is it a sealed driver?

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

EBP = Fs ÷ Qes = 43.0
SEALED 0–50 TRANSITION 50–100 PORTED 100–150 0 50 100 150 3 ohm 43.0
3 ohm · EBP 43.0
EBP under 50 means a motor that wants a sealed load. The GT2 2010 sits at 43.0, inside that band, which is why this is a sealed build rather than a ported one.

02What the box does to it

0.80 cu ft against a 33.2 L Vas.

α = Vas ÷ Vb = 1.47  ·  Fc = Fs√(α+1) = 43 Hz  ·  Qtc = 0.96
20 30 50 70 100 150 200 +6 +0 -6 -12 -18 -24 FREQUENCY · Hz LEVEL · dB −3 dB
3 ohm · Qtc 0.96, Fc 43 Hz, F3 34.6 Hz
The box lifts resonance from 27.5 Hz free-air to 43 Hz and half power lands at 34.6 Hz, anechoic, before any cabin gain. Audiomobile recommends only a vented box for the GT2 2010 and publishes no displacement; 0.088 cubic feet is estimated. With a Qts of 0.61 no trunk-sized sealed box reaches maximally flat; 0.80 cubic feet per driver reads Qtc 0.96.

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 11.9 mm — and a bigger one once a subsonic filter stops it wasting travel below the passband.

PXmax = 194 W unfiltered  →  218 W with a 25 Hz subsonic
20 30 50 70 100 150 200 0 4 8 12 FREQUENCY · Hz CONE TRAVEL · mm PAST LINEAR TRAVEL · Xmax 11.9 mm 194 W reaches Xmax here
3 ohm · 194 W, no filter3 ohm · 218 W with subsonic at 25 Hz, 24 dB/octXmax 11.9 mm one-way
Every trace touches the limit and no further, because each is drawn at the exact power that puts that coil on 11.9 mm. Unfiltered that is 194 W, reached first at 29 Hz. It sits under the 400 W the driver can take thermally, so the enclosure sets the ceiling, not the voice coil. 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 218 W before hitting the same 11.9 mm. That is 12 percent more amplifier for the price of one filter setting.
ParamValueUnitNote
Fs27.50Hzfree-air resonance
Qts0.6103 ohm
Vas33.20Lequivalent compliance
Sd346.0cm²effective piston area
Xmax11.9mmone-way, 70% Bl, as Audiomobile publish it
Pe400Wcontinuous RMS
SPL82.2dB1 W / 1 m, derived from T/S

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

From the shop floor

Installer's take

0.80 cubic feet, Qtc 0.958, F3 34.6 Hz, the same airspace as the GT2 2010 wedge.

Measure the installed height, not the cabinet height: 6.42 tall on its own, 8.17 with the standoffs on the 30 by 15 footprint.

Floor slot is 0.94 times the cone area at the 1.75 standoff, a little under the 1.0 I like; taller feet fix it if the floor allows.

No published bolt circle, so the inserts ship in the kit: mark from the driver, drill, press. Sealed, so leave the polyfill as it is and run 280 to 400 watts.

Before you order

Questions

Does this fit the Audiomobile GT2 2010, and will any other 10 inch fit?

The GT2 2010, yes, in the 3 ohm version. The baffle is cut to 9.2 in, Audiomobile's published mounting hole, under the 10.65 in frame. The 4.25 inch motor clears the cabinet with 1.42 inch to spare.

Any other 10, no. The airspace is engineered around the GT2 2010's own Qts and Vas, and a different woofer that happened to drop into the hole would not see the alignment printed on this page.

Why 0.80 cubic feet, and what alignment does it target?

0.80 cubic feet net: the GT2 2010 reads Qtc 0.958 with resonance at 43.2 Hz and half power at 34.6 Hz. That is above maximally flat: a firm, punchy sealed box with a lift near resonance.

Cabinet gain in a vehicle lifts the bottom end further, so in the car this reads deeper than the anechoic figures.

What amplifier power should I run, and how should I wire it?

Audiomobile rates the GT2 2010 at 400 watts RMS, so target 280 to 400 watts RMS at the final load.

The GT2 2010 has a single 3 ohm coil (2.8 ohms DC), so one driver presents 3 ohms to a mono amplifier. Confirm your amplifier's minimum stable impedance first.

How tall is this once the standoffs are on?

The cabinet is 6.42 inches tall measured in the down fire position, and that figure excludes the standoffs. The standoffs hold 1.75 inches under the baffle, so plan your space around a finished stack of roughly 8.17 inches.

The footprint is the standard Performance Optimized down fire platform, 30.00 inches wide by 15.00 deep. Height is the only dimension solved to the driver.

Why is the front baffle double-layered?

The baffle is two bonded 3/4 inch sheets, 1.5 inches through. A single 3/4 inch panel flexes under the pressure a 10 inch woofer puts on it at 400 watts, which smears output and works the driver loose over time; the second layer stiffens the face and gives the mounting hardware twice the material to bite.

The outer layer is machined as a flush recess to Audiomobile's 10.65 inch frame, so the driver bolts to the inner layer.

What is the expected low-frequency extension?

Anechoic F3 is 34.6 Hz. Above Qtc 0.707 F3 sits below fc, so the response carries a small lift near resonance before it rolls off.

Those figures exclude cabin gain. In a car the cabin's transfer function adds real output below 50 Hz, so in-vehicle response runs deeper than the numbers above.

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 walks the alignment away from the 0.80 cubic feet this cabinet was built to.

Is the driver included, and are the threaded inserts installed?

No driver. This is an enclosure only. You receive the cabinet finished in plush black carpet, one side-mounted pre-wired terminal cup, the polyfill lining already in place, the standoffs, and a threaded insert kit with stainless machine screws.

The inserts ship loose on purpose: Audiomobile prints no bolt circle for the GT2 2010, so you set the driver in the recess, mark its holes, drill and press the inserts. The Audiomobile GT2 2010 is purchased separately, and the cabinet is cut direct fit to it, not a general purpose 10 inch box.

Same series, same size

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