Performance Optimized · Datasheet
Performance Optimized Wedge Sealed 12" Enclosure DD Audio 712f · Single 12" Sealed enclosure
- Net volume
- 0.82 cu ft
- Max mounting depth
- 9.500 in available, 9.000 in required
- Cutout
- 11.375 in
- External dimensions
- 15.12 in W × 15 in at the seat face H × 15.90 in at the base D
- Front baffle
- 1.5 in, double baffle
- Best For: DD Audio 712f Trunk-Fit Builds
- Net Volume: 0.82 cu ft (1.00 cu ft Gross)
- Alignment: Qtc 0.679, fc 45.9 Hz, F3 47.9 Hz
- Driver Match: DD Audio 712f (D2 or D4)
- Construction: Rear-Firing Wedge | V-Groove/Dado | Double 1.5" Baffle | Threaded Insert Kit included
Spec of record
Technical specifications
| Specification | Value |
|---|---|
| Series | Proline X Performance Optimized Wedge |
| Compatible Driver | DD Audio 712f, D2 or D4, quantity 1. Direct fit |
| Configuration | Single 12 inch, single chamber sealed wedge |
| Mounting Position | Trunk or cargo area, tall face against the rear seat back |
| Firing Direction | Rearward into the trunk. Not a down fire design, no feet included |
| External Width | 15.12 in |
| External Height | 15 in at the seat face |
| External Depth | 15.90 in at the base, tapering to 10.44 in at the top |
| Internal Volume, Gross | 1.00 cu ft |
| Internal Volume, Net Acoustic | 0.82 cu ft |
| Alignment | Qtc 0.679, fc 45.9 Hz, F3 47.9 Hz anechoic |
| Driver Cutout | 11.375 in |
| Driver Mounting Depth | 9.500 in available, 9.000 in required |
| Frame Outer Diameter | 12.625 in, as published by DD Audio |
| Driver Displacement | 0.170 cu ft, as published by DD Audio |
| Cone Area (derived) | 532.4 cm2, from DD's published piston diameter; DD publish no Sd |
| Power Handling | 1500 watts RMS |
| Impedance | D2: 4 ohms in series or 1 ohm in parallel; D4: 8 ohms in series or 2 ohms in parallel |
| Xmax | 22 mm one way |
| Material | Langboard Elite MDF |
| Construction | CNC cut, V-groove and dado joinery |
| Panel Thickness | 0.75 in |
| Front Baffle | 1.5 in, double baffle |
| Internal Bracing | Internal brace |
| Driver Mounting | Threaded insert kit included, NOT pre-installed: DD publish no mounting hole locations |
| Terminal Cups | One Proline X ABS and carbon fiber composite, side mounted, pre wired 12 gauge OFC |
| Damping | Light polyfill wall lining, does not alter acoustic volume |
| Carpet | Plush black |
| Weight | 23.2 lb |
| Warranty | 1 Year Limited |
| Built In | Tullahoma, Tennessee |
From the shop floor
Installer's take
0.82 cubic feet net, the Butterworth volume for this driver computed from DD's published Fs, Qts and Vas. In it the 712f lands at Qtc 0.679, maximally flat, the reference musical alignment, with system resonance at 45.9 Hz. Half power lands at 47.9 Hz anechoic, before any cabin gain.
DD publishes no Sd for any of its drivers. The 532.4 square centimetre figure behind this alignment is derived from DD's own published piston diameter, which they define as measured halfway across the surround, the convention Sd itself is defined from. DD publishes no Mms, Cms or DC resistance either.
DD publishes no mounting hole locations, so the inserts are not in the baffle when the box arrives. The insert kit is in the box: set them where the woofer's own holes fall, with the drill bit and screws in the kit, and lay the gasket tape before the woofer goes down.
DD sells the 712f in D2 and D4. the D2 is two 2 ohm coils, 4 ohms in series or 1 ohm in parallel; the D4 is two 4 ohm coils, 8 ohms in series or 2 ohms in parallel. DD publishes one set of Thiele-Small parameters for the model rather than a set per coil, so this cabinet is the same either way. A parallel load at or under 1 ohm needs an amplifier rated for it.
Measure the base depth. This cabinet is 15.90 inches deep at the trunk floor, 10.44 at the top, and 15.12 wide. It is deeper at the base than it is tall, because the 712f carries a 9.000 in motor and the cabinet has to clear it.
Before you order
Questions
Will this enclosure fit both coil versions of the 712f?
Yes. DD sells the 712f in D2 and D4 and publishes one set of Thiele-Small parameters for the model rather than a set per coil, so the cabinet is the same either way. The cutout is 11.375 in and the mounting depth allowance is 9.500 in.
Why 0.82 cubic feet net?
0.82 cubic feet net, the Butterworth volume for this driver computed from DD's published Fs, Qts and Vas. In it the 712f lands at Qtc 0.679, maximally flat, the reference musical alignment, with system resonance at 45.9 Hz. The box is 1.00 cu ft gross before the driver's displacement of 0.170 cu ft, which is DD's own figure.
What amplifier power should I run, and what impedance?
DD rate the 712f at 1500 watts RMS. DD sells the 712f in D2 and D4. the D2 is two 2 ohm coils, 4 ohms in series or 1 ohm in parallel; the D4 is two 4 ohm coils, 8 ohms in series or 2 ohms in parallel. DD publishes one set of Thiele-Small parameters for the model rather than a set per coil, so this cabinet is the same either way. A parallel load at or under 1 ohm needs an amplifier rated for it. Aim for roughly 1050 to 1500 watts at the impedance you wire.
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.
Where does the cone area figure come from?
DD publishes no Sd for any of its drivers. The 532.4 square centimetre figure behind this alignment is derived from DD's own published piston diameter, which they define as measured halfway across the surround, the convention Sd itself is defined from. DD publishes no Mms, Cms or DC resistance either.
What is the expected low-frequency extension?
Half power lands at 47.9 Hz anechoic, before any cabin gain. Qtc is 0.679. These figures exclude cabin gain, which in most vehicles adds real output below 40 Hz. DD publish the 712f's free-air resonance at 32.13 Hz.
Do I need to add polyfill or damping?
No. Polyfill is already installed as a light wall lining and the quantity is chosen so it does not change the acoustic volume. Do not add more.
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 and the polyfill lining installed. DD Audio publishes no mounting hole locations for this driver, so the threaded inserts are not pressed before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, allen-head screws, an allen key and woofer gasket tape. You set them when the woofer goes in.
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