

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
- 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
| Series | Proline X Performance Optimized Down Fire Wide |
|---|---|
| Compatible Driver | Wavtech thinPRO12. Direct fit |
| Enclosure Type | Sealed, down fire, floor coupled |
| Intended Fitment | Spaces where height or depth is the limit and 41 in of run is available |
| Chamber Configuration | Single chamber, windowed U-brace, one side-mounted terminal cup |
| External Width | 41 in |
| External Depth | 14 in |
| External Height | 4.625 in in the down fire position, excludes standoffs |
| Installed Height | 6.375 in including the 1.75 in standoffs |
| Internal Volume, Gross | 0.66 cu ft |
| Internal Volume, Net | 0.613 cu ft after the brace and 0.042 cu ft displacement |
| Height Set By | Airspace; 0.875 in clearance above the motor |
| Alignment, thinPRO12-2 | Qtc 0.906, Fc 46.2 Hz, F3 38.2 Hz anechoic |
| Alignment, thinPRO12-4 | Qtc 0.851, Fc 48.1 Hz, F3 41.3 Hz anechoic |
| Comparison, Standard 30 x 15 | 5.25 in tall, 0.60 cu ft net. Wide format is 4.625 in tall with 0.613 cu ft net |
| Driver Fs | 25 Hz (-2) / 26 Hz (-4) |
| Driver Qts | 0.49 (-2) / 0.46 (-4) |
| Driver Qes / Qms | 0.55 / 5.02 (-2) | 0.51 / 4.16 (-4) |
| Driver Vas | 42 Liters Each |
| Driver Re | 1.85 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 Sd | 510.7 cm² / 79.16 sq in |
| Driver Displacement | 0.042 Cubic Feet / 1.2 L (Published by Wavtech) |
| Driver Sensitivity | 83 dB (-2) / 84 dB (-4) |
| Power Handling | 750 Watts RMS / 2250 Watts Peak |
| Recommended Power Range | 250 to 750 Watts RMS Per Driver (Wavtech Spec) |
| Driver Voice Coil | 5 in / 127mm | 4-Layer High-Temp | Vented Polyimide Composite Former |
| Driver Cone | Honeycomb Nomex + Glass Fiber Composite |
| Driver Surround | High-Excursion Double-Roll NBR |
| Driver Spider System | Dual Internal Mirrored NBR Spiders |
| Driver Motor | FEA-Optimized Dual-Gap, Double-Stacked Strontium Magnets |
| Driver Frame | Vented Cast Aluminum |
| Mounting Depth Required | 3.0 Inches / 76.2mm (Wavtech Spec) |
| Cutout Diameter | 11.125 Inches / 282mm (Wavtech Spec) |
| Driver Overall Diameter With Gasket | 13.0625 Inches / 331.5mm (Wavtech Spec) |
| Voice Coil Configuration | Single Voice Coil Per Driver, Impedance Set By Driver Model |
| Material | Langboard Elite 3/4 in MDF |
| Construction | ShopSabre CNC, V-groove and dado joinery |
| Panel Thickness | 0.75 in |
| Front Baffle | 1.5 in double baffle, outer layer machined as a flush recess |
| Internal Bracing | Windowed U-brace, dadoed to the shell |
| Corner Profile | Square, Down Fire series standard |
| Driver Mounting | 8/32 threaded inserts with stainless machine screws |
| Terminal Cup | One Proline X ABS and carbon fiber composite, side mounted, pre-wired 12 gauge OFC |
| Standoffs | Included, 1.75 in, shipped uninstalled |
| Damping | Light polyfill wall lining, does not alter acoustic volume |
| Carpet | Plush Black |
| Bundle Options | Enclosure only, bring your own Wavtech thinPRO12 |
| Warranty | 1 Year Limited |
| Built In | Tullahoma, Tennessee |
Modelled response
Performance in this enclosure
01Is it a sealed driver?
Efficiency bandwidth product places the motor before anything else is decided.
02What the box does to it
0.613 cu ft against a 42.0 L Vas.
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.
| Param | Value | Unit | Note |
|---|---|---|---|
| Fs | 25.00 / 26.00 | Hz | free-air resonance |
| Qts | 0.490 / 0.460 | -2 / -4 | |
| Vas | 42.00 / 42.00 | L | equivalent compliance |
| Sd | 510.7 | cm² | effective piston area |
| Xmax | 20 | mm | one-way linear travel |
| Pe | 750 | W | continuous RMS |
| SPL | 82.6 | dB | 1 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.
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