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Performance Optimized · Datasheet

Performance Optimized Down Fire Wide Sealed 12" Shallow Sub Enclosure Wavtech thinPRO12 · Single 12" Sealed enclosure

Net volume
0.613 cu ft after the brace and 0.042 cu ft displacement
Max mounting depth
3.0 Inches / 76.2mm (Wavtech Spec)
Cutout
11.125 Inches / 282mm (Wavtech Spec)
External dimensions
41 in W × 4.625 in in the down fire position H × 14 in D
Front baffle
1.5 in double baffle, outer layer machined as a flush recess
Buy at Audio IntensityFactory-direct, ships from Tullahoma
Wavtech thinPRO12Buy at Audio Intensity
  • Alignment: 0.613 cu ft net. thinPRO12-2: Qtc 0.906, Fc 46.2 Hz, F3 38.2 Hz; thinPRO12-4: Qtc 0.851, Fc 48.1 Hz, F3 41.3 Hz
  • Down Fire Wide: 41"W x 14"D x 4.625"H in down fire position, excludes standoffs, square corners
  • Versus the standard 30 x 15: 5.25 in tall and 0.60 cu ft net there, 4.625 in tall and 0.613 cu ft net here
  • Driver: Wavtech thinPRO12-2 or thinPRO12-4 (SVC), 750W RMS, 20mm Xmax, 3.0" mounting depth
  • Standoffs: Included, 1.75 in, shipped uninstalled. Installed height 6.375 in

Spec of record

Technical specifications

SeriesProline X Performance Optimized Down Fire Wide
Compatible DriverWavtech thinPRO12. Direct fit
Enclosure TypeSealed, down fire, floor coupled
Intended FitmentSpaces where height or depth is the limit and 41 in of run is available
Chamber ConfigurationSingle chamber, windowed U-brace, one side-mounted terminal cup
External Width41 in
External Depth14 in
External Height4.625 in in the down fire position, excludes standoffs
Installed Height6.375 in including the 1.75 in standoffs
Internal Volume, Gross0.66 cu ft
Internal Volume, Net0.613 cu ft after the brace and 0.042 cu ft displacement
Height Set ByAirspace; 0.875 in clearance above the motor
Alignment, thinPRO12-2Qtc 0.906, Fc 46.2 Hz, F3 38.2 Hz anechoic
Alignment, thinPRO12-4Qtc 0.851, Fc 48.1 Hz, F3 41.3 Hz anechoic
Comparison, Standard 30 x 155.25 in tall, 0.60 cu ft net. Wide format is 4.625 in tall with 0.613 cu ft net
Driver Fs25 Hz (-2) / 26 Hz (-4)
Driver Qts0.49 (-2) / 0.46 (-4)
Driver Qes / Qms0.55 / 5.02 (-2) | 0.51 / 4.16 (-4)
Driver Vas42 Liters Each
Driver Re1.85 Ohm (-2) / 3.3 Ohm (-4)
Driver Xmax (One-Way Linear)20mm / 0.79 in
Driver Xmech (Peak-to-Peak)54mm / 2.13 in
Driver Sd510.7 cm² / 79.16 sq in
Driver Displacement0.042 Cubic Feet / 1.2 L (Published by Wavtech)
Driver Sensitivity83 dB (-2) / 84 dB (-4)
Power Handling750 Watts RMS / 2250 Watts Peak
Recommended Power Range250 to 750 Watts RMS Per Driver (Wavtech Spec)
Driver Voice Coil5 in / 127mm | 4-Layer High-Temp | Vented Polyimide Composite Former
Driver ConeHoneycomb Nomex + Glass Fiber Composite
Driver SurroundHigh-Excursion Double-Roll NBR
Driver Spider SystemDual Internal Mirrored NBR Spiders
Driver MotorFEA-Optimized Dual-Gap, Double-Stacked Strontium Magnets
Driver FrameVented Cast Aluminum
Mounting Depth Required3.0 Inches / 76.2mm (Wavtech Spec)
Cutout Diameter11.125 Inches / 282mm (Wavtech Spec)
Driver Overall Diameter With Gasket13.0625 Inches / 331.5mm (Wavtech Spec)
Voice Coil ConfigurationSingle Voice Coil Per Driver, Impedance Set By Driver Model
MaterialLangboard Elite 3/4 in MDF
ConstructionShopSabre CNC, V-groove and dado joinery
Panel Thickness0.75 in
Front Baffle1.5 in double baffle, outer layer machined as a flush recess
Internal BracingWindowed U-brace, dadoed to the shell
Corner ProfileSquare, Down Fire series standard
Driver Mounting8/32 threaded inserts with stainless machine screws
Terminal CupOne 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
Bundle OptionsEnclosure only, bring your own Wavtech thinPRO12
Warranty1 Year Limited
Built InTullahoma, Tennessee

Modelled response

Performance in this enclosure

Net airspace
0.613
cu ft per chamber
System Qtc
0.85–0.91
sealed
Half power
38.2–41.3
Hz · F3
Xmax at
1524
W RMS · no filter
With 25 Hz subsonic
1691
W RMS · +11%
Amplifier
250–750
W RMS recommended
This enclosure holds 0.613 cu ft net per chamber. In it the Wavtech thinPRO12 runs a system Qtc of 0.85–0.91 with half power at 38.2–41.3 Hz, and the cone reaches its 20.0 mm travel limit at 1524 W, above the driver’s 750 W thermal rating, so heat stops you before travel does. Run a subsonic filter at 25 Hz and that becomes 1691 W — +167 W, or 11 percent more power for the same 20.0 mm of travel.

01Is it a sealed driver?

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

EBP = Fs ÷ Qes = 45.3–51.0
SEALED 0–50 TRANSITION 50–100 PORTED 100–150 0 50 100 150 -2 45.3 -4 51.0
-2 · EBP 45.3-4 · EBP 51.0
The thinPRO12 straddles the boundary at 45.3–51.0 depending on coil — part sealed-band, part transition. Either way it takes a sealed load happily; the coil you run shifts the alignment more than it shifts this verdict.

02What the box does to it

0.613 cu ft against a 42.0 L Vas.

α = Vas ÷ Vb = 2.42  ·  Fc = Fs√(α+1) = 46–48 Hz  ·  Qtc = 0.85–0.91
20 30 50 70 100 150 200 +6 +0 -6 -12 -18 -24 FREQUENCY · Hz LEVEL · dB −3 dB
-2 · Qtc 0.91, Fc 46 Hz, F3 38.2 Hz-4 · Qtc 0.85, Fc 48 Hz, F3 41.3 Hz
The box lifts resonance from 25.0–26.0 Hz free-air to 46–48 Hz and half power lands at 38.2–41.3 Hz, anechoic, before any cabin gain.

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

PXmax = 1524–1564 W unfiltered  →  1691–1760 W with a 25 Hz subsonic
20 30 50 70 100 150 200 0 8 16 24 FREQUENCY · Hz CONE TRAVEL · mm PAST LINEAR TRAVEL · Xmax 20.0 mm 1524 W reaches Xmax here
-2 · 1524 W, no filter-4 · 1564 W, no filter-2 · 1691 W with subsonic at 25 Hz, 24 dB/oct-4 · 1760 W with subsonic at 25 Hz, 24 dB/octXmax 20.0 mm one-way
Every trace touches the limit and no further, because each is drawn at the exact power that puts that coil on 20.0 mm. Unfiltered that is 1524 W, reached first at 29 Hz. It sits above the 750 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 1691 W before hitting the same 20.0 mm. That is 11 percent more amplifier for the price of one filter setting.
ParamValueUnitNote
Fs25.00 / 26.00Hzfree-air resonance
Qts0.490 / 0.460-2 / -4
Vas42.00 / 42.00Lequivalent compliance
Sd510.7cm²effective piston area
Xmax20mmone-way linear travel
Pe750Wcontinuous RMS
SPL82.6dB1 W / 1 m, derived from T/S

Driver parameters as published by Wavtech thinPRO12 specifications via store record; the -2 Qes is derived from its published Qts and the shared mechanical Qms. Curves computed against this enclosure’s actual net airspace.

From the shop floor

Installer's take

Same thinPRO12 as the standard 30 by 15 box, laid out 41 by 14. One inch shallower, 11 inches longer, and 4.625 inches tall against 5.25. Measure all three dimensions before choosing between them.

Airspace set the height here, 0.613 cubic feet net, with 0.875 inches clear above the motor.

Alignment: thinPRO12-2 at Qtc 0.906, F3 38.2 Hz; thinPRO12-4 at Qtc 0.851, F3 41.3 Hz.

Single voice coil on both variants, so impedance is fixed by the model. 2 ohms for the -2, 4 ohms for the -4. 83 to 84 dB sensitivity, so give them the power.

Before you order

Questions

Why is this cabinet 41 inches wide instead of 30?

Because it trades length for depth and height. The standard single Down Fire platform is 30 wide by 15 deep; this one is 14 deep, 1 inch shallower, and runs 41 inches long to put the airspace along the length instead.

That lets it stand 4.625 inches tall against 5.25 for the standard box. A 12 inch frame needs about 13 inches of baffle, so 14 is as shallow as a 12 can go. If you have 41 inches of run and height or depth is your limit, this is the shape that works.

How does this compare to the standard 30 x 15 thinPRO12 enclosure?

The standard box is 30 by 15 by 5.25 inches and holds 0.60 cubic feet net. This one is 41 by 14 by 4.625 inches and holds 0.613 cubic feet net.

Choose the standard box when length is limited. Choose this one when height or depth is the limit and you have 41 inches of run.

What alignment does this enclosure produce?

At 0.613 cubic feet net the result is thinPRO12-2: Qtc 0.906, Fc 46.2 Hz, F3 38.2 Hz; thinPRO12-4: Qtc 0.851, Fc 48.1 Hz, F3 41.3 Hz, calculated from the driver's own published Thiele-Small parameters.

That is above the 0.707 maximally flat reference, so there is real lift near the corner rather than a textbook flat curve. The figures are anechoic; in a car, cabin gain adds real output below 50 Hz, so in-vehicle response runs deeper.

How much power should I run, and how do I wire it?

Wāvtech rates the thinPRO12 at 750 watts RMS and 2250 peak, and recommends 250 to 750 watts. Aim for the upper half, since sensitivity is 83 dB on the -2 and 84 dB on the -4.

Both are single voice coil, so impedance is fixed by the model: 2 ohms for the -2, 4 ohms for the -4. Confirm the load against your amplifier's minimum stable impedance.

How tall is this once the standoffs are on?

The cabinet is 4.625 inches tall measured in the down fire position, excluding standoffs. The standoffs hold 1.75 inches under the baffle, so plan your space around 6.375 inches installed.

The standoffs ship uninstalled, so you can place them to suit your floor, or leave them off and run the cabinet front firing or up firing.

Where is the terminal cup located on a down fire enclosure?

Side mounted. Every Proline X Performance Optimized enclosure uses a side mounted terminal cup regardless of alignment, whether standard, wedge, or down fire. On this cabinet that keeps the connection accessible with the enclosure installed, since the baffle faces the floor. The cup is our Proline X ABS and carbon fiber composite unit with stainless hardware, copper ring terminals, and pre-wired 12 gauge OFC.

How is this enclosure built?

V-groove and dado joinery, CNC cut on ShopSabre routers from Langboard Elite MDF, with square corners as the Down Fire standard. Every panel joint is a machined interlocking groove that locks before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling.

The 1.5 inch double baffle has its outer layer machined as a flush recess so the driver bolts to the inner layer, and a windowed U-brace stiffens the long panels. Polyfill is installed as a light wall lining; do not add more, since packing a sealed box makes it act larger and moves the alignment. Assembled and inspected in Tullahoma, Tennessee.

Is the Wāvtech thinPRO12 included with this enclosure?

No. This listing is for the enclosure only. Bring your own Wāvtech thinPRO12-2 or thinPRO12-4. The cutout and cabinet height are cut direct fit for this driver.

Same series, same size

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