Crossfire BMF1228

12" Dual 4 Ohm BMF Series Car Subwoofer

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12" Dual 4 Ohm BMF Series Car Subwoofer • 1000W Max • 500W RMS • Co-polymer Cone Material • Stitched Rubber Surround • Flexible Impedance Technology • Chrome Cast Aluminum Frame • Dual Stacked 85 oz Magnet Structure

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This item has been discontinued

Product Highlights

12" Dual 4 Ohm BMF Series Car Subwoofer • 1000W Max • 500W RMS • Co-polymer Cone Material • Stitched Rubber Surround • Flexible Impedance Technology • Chrome Cast Aluminum Frame • Dual Stacked 85 oz Magnet Structure


Premium Bass with Crossfire

Sonic Electronix is excited to introduce the BMF Subwoofer Series from Crossfire. Available in 10" 12" and 15" models, these subwoofers feature a co-polymer cone and stitched rubber surround, increasing the rigidity and optimum performance of the subwoofers. Ranging from 400-600 watts RMS, the subwoofers will produce deep,clean hitting bass in any vehicle. The "FIT" dual voice coil impedance selector will allow for instant series or parallel voice-coil configuration when wiring dual voice coils. This will allow quick and easy wiring installation when dealing with either the dual 2 or dual 4 ohm versions. Spring loaded compression input terminals will create a secure and reliable connection each and every single time. Designed to work in either sealed or ported enclosures, perfect for those seeking sound quality or sound pressure level. These high-end, high-quality BMF series subwoofers function like a premium subwoofer at an affordable price.

  • 12" Dual 4 Ohm BMF Series Car Subwoofer
  • Power Handling:
    • Peak: 1000 watts
    • RMS: 500 watts
  • Impedance: 4 Ohms
  • Co-polymer cone material
  • Stitched rubber surround
  • Proprietary chrome aluminum cast frame
  • Flexible Impedance Technology (FIT)
  • Dual Voice Coil (DVC) impedance selector
  • Chromed signature etched back plate
  • Chrome plated extended/vented back plate
  • Compression nickel-plated sprig loaded input terminals
  • Designed for both vented and sealed enclosures
  • 2-1/2" 4 Layer Dual 4 Ohm Kapton voice coil
  • Dual 85 oz. ceramic stacked magnet structure
  • Frequency response: 20-250 Hz
  • Sensitivity: 84.6 dB
  • Xmax: 14mmm
  • Mounting depth: 6-3/8"
  • Cutout dimensions: 11-1/8"
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Subwoofer Wiring Guide

Wiring Guide to Wire 1 Crossfire BMF1228 Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 Crossfire BMF1228 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

Wiring Guide to Wire 3 Crossfire BMF1228 Subwoofers

Mono Amp

4 Channel Amp

Wiring Guide to Wire 4 Crossfire BMF1228 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Specifications & Details

Subwoofer Specifications
BMF Series
Subwoofer Size
Peak Power Handling
1000 watts
RMS Power Handling
500 watts
Voice Coil(s)
Impedance (Per Voice Coil)
4 ohms
Voice Coil Material
Voice Coil Diameter
Frequency Response
20 - 250 Hz
84.6 dB
Xmax (millimeters)
14 mm
Subwoofer Design
Round / Circle
Main Cone Color
Woofer Composition
Woofer Surround
Magnet Structure
Magnet weight
Magnet Type
Subwoofer Grille
Re-Cone Kit Available
CTA-2031 Compliant
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Minimum Sealed Box Volume
0.8 cubic feet
Optimum Sealed Box Volume
Maximum Sealed Box Volume
1.8 cubic feet
Minimum Ported Box Volume
1.5 cubic feet
Optimum Ported Box Volume
Maximum Ported Box Volume
2.75 cubic feet
Top-Mount Depth (Mounting Depth)
Cutout Diameter
Shallow Mount Installation
Electromechanical Parameters
Free-Air Resonance (Fs)
Equivalent Compliance (Vas)
Total Speaker Q Value (Qts)
Electrical Q Value (Qes)
Electrical Resistance of Voice Coil (Re)
Mechanical Q Value (Qms)
Efficiency Bandwidth Product (EBP)
What is in the box?
WITB: Subwoofers
Other Accessory #1
Other Accessory #2
Other Accessory #3
Other Accessory #4
Other Accessory #5
Other Accessory #6
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Item Details


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Crossfire BMF1228

Decent sub that is versitile due to the dual 4ohm voice coils. Paired with the right amount of power this sub offers great sound for the money and is sure to please a wide audience of listeners. I have it in a custom ported box, and the bass is tight and accurate without being overly boomy. Wish the xmax was a lil more as it would move a good deal more air from peak to peak, but again, you wont be disappointed with the end results.

By Lawrence on January 4, 2015


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