Proline X PO 12-S W MF12S sealed wedge, front baffle with gloss black insert and pre-wired leads, 24.51 by 15 inches.Proline X PO 12-S W MF12S sealed wedge, side profile with recessed terminal cup, 13.19 inch base, 15 inches tall.

Performance Optimized · Datasheet

Performance Optimized Wedge Sealed 12" Enclosure | Deaf Bonce Machete MF-12S Single 12" Sealed enclosure

Net volume
1.19 cu ft
Max mounting depth
6.79 in available, 6.29 in required by the driver
Cutout
11.14 in
External dimensions
24.51 in W × 15 in at the seat face H × 13.19 in at the base D
Front baffle
1.5 in, double baffle
Buy at Audio Intensity
  • Best For: Deaf Bonce Machete MF-12S Trunk-Fit Builds
  • Net Volume: 1.19 cu ft (1.28 cu ft Gross)
  • Alignment: Qtc 0.707, fc 50.5 Hz, F3 50.5 Hz
  • Driver Match: Deaf Bonce Machete MF-12S (MF-12S D2)
  • Impedance: 4 ohm single coil
  • Construction: Rear-Firing Wedge | V-Groove/Dado | Double 1.5" Baffle | Threaded Inserts

Technical specifications

SpecificationValue
SeriesProline X Performance Optimized Wedge
Compatible DriverDeaf Bonce Machete MF-12S, quantity 1. Direct fit
ConfigurationSingle 12 inch, single chamber sealed wedge
Mounting PositionTrunk or cargo area, tall face against the rear seat back
Firing DirectionRearward into the trunk. Not a down fire design, no feet included
External Width24.51 in
External Height15 in at the seat face
External Depth13.19 in at the base, tapering to 7.73 in at the top
Internal Volume, Gross1.28 cu ft
Internal Volume, Net Acoustic1.19 cu ft
AlignmentQtc 0.707, fc 50.5 Hz, F3 50.5 Hz anechoic
Driver Cutout11.14 in
Driver Mounting Depth6.79 in available, 6.29 in required by the driver
Frame Outer Diameter12.64 in, bounded from the cutout (not published)
Driver Displacement (estimated)0.08 cu ft, not published by Deaf Bonce
Power Handling800 watts RMS
Impedance4 ohm single coil
Xmax14 mm one way
Sensitivity86 dB as published by Deaf Bonce
MaterialLangboard Elite MDF
ConstructionCNC cut, V-groove and dado joinery
Panel Thickness0.75 in
Front Baffle1.5 in, double baffle
Internal BracingInternal brace
Driver MountingThreaded inserts at every mounting location, stainless machine screws included
Terminal CupsOne Proline X ABS and carbon fiber composite, side mounted, pre wired 12 gauge OFC
DampingLight polyfill wall lining, does not alter acoustic volume
CarpetPlush black
Weight34.3 lb
Warranty1 Year Limited
Built InTullahoma, Tennessee

Installer's take

1.19 cubic feet net. That is the Butterworth volume for the MF-12S D2 coil, computed from Deaf Bonce's published Fs, Qts and Vas. Deaf Bonce publish no sealed recommendation for the MF-12S (their manual recommends a bass-reflex box), so this alignment is ours, chosen for damping and transient control rather than peak output. Half power lands at 50.5 Hz anechoic, before any cabin gain.

Qtc lands at 0.707, maximally flat, the reference musical alignment, with system resonance at 50.5 Hz.

Deaf Bonce print no frame diameter for the MF-12S, so the recess is bounded at the 11.14 in cutout plus 1.5 in, the widest flange overhang across the Machete drawings, and cannot land undersize. Deaf Bonce do not publish driver displacement; the 0.08 cu ft carried here is an estimate for a 12 inch motor, and only the gross figure depends on it.

Measure the base depth. This cabinet is 13.19 inches deep at the trunk floor, 7.73 at the top, and 24.51 wide.

Questions

Does the MF-12S come in more than one version?

No. Deaf Bonce sell the MF-12S as a single 4 ohm coil driver, and this cabinet is cut to its 11.14 in cutout and 6.29 in mounting depth.

Why 1.19 cubic feet net?

1.19 cubic feet net. That is the Butterworth volume for the MF-12S D2 coil, computed from Deaf Bonce's published Fs, Qts and Vas. Deaf Bonce publish no sealed recommendation for the MF-12S (their manual recommends a bass-reflex box), so this alignment is ours, chosen for damping and transient control rather than peak output. Qtc lands at 0.707, maximally flat, the reference musical alignment, with system resonance at 50.5 Hz. The box is 1.28 cu ft gross before the driver's displacement. Deaf Bonce do not publish driver displacement; the 0.08 cu ft carried here is an estimate for a 12 inch motor, and only the gross figure depends on it.

What amplifier power should I run, and what impedance?

Deaf Bonce rate the MF-12S at 800 watts RMS. The MF-12S is a single 4 ohm coil, so there is no wiring choice to make: one pair of leads to the cup, 4 ohms at the amplifier. Aim for roughly 560 to 800 watts at 4 ohms.

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.

Why a rear-firing wedge instead of a plain box?

A rectangular box of this volume wastes the triangle of space a leaning rear seat creates, and firing into the trunk lid rather than at the seat back gives the cabin a smoother path to the passengers. The wedge takes the same air volume and puts it where the car actually has room.

What is the expected low-frequency extension?

Half power lands at 50.5 Hz anechoic, before any cabin gain. Qtc is 0.707. These figures exclude cabin gain, which in most vehicles adds real output below 40 Hz. Deaf Bonce publish the MF-12S's free-air resonance at 35 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?

No. This is an enclosure only. You receive the cabinet finished in plush black carpet, with threaded inserts at the driver position, stainless machine screws, one side-mounted pre-wired terminal cup and the polyfill lining already installed.

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