MTX RFL15 picture


38cm 15" 3500W RMS 2Ω Subwoofer with Ø100mm 4" single voice coil, 14Kg 500OZ magnet structure, aluminum reinforced frame and 35mm thick front plate


The MTX RFL15 subwoofer is the worthy heir to a line of extreme subwoofers. In 2002, the RFL152 with multiple SPL records, in 2005 the Jackhammer22 (Pimp My Ride), the biggest and heaviest sub ever marketed (165Kg diameter 56cm), in 2005 the Jackhammer24 the largest square subwoofer ever marketed... The RFL12 surpasses all of its ancestors... It is the very best. Not one technology has been spared it. All the best materials are gathered around its cradle!
- Gigantic magnetic structure with more than 14Kg of strontium… Perhaps the largest on the market.
- Chassis in the purest MTX T8000 style, but ultra reinforced. The original T8000 chassis weighs 1200g. That of the RFL passes 3200g… All the hollow parts are filled, all the arms of the frame have doubled in volume, the contact with the upper circle is ultra reinforced.
- 35mm thick front plate (It measured 8mm on the older T9500s). This is what it takes to pass the enormous magnetic flux generated by the magnet and control the coil like no other subwoofer can.
- 35mm thick rear plate.
- 100mm 4" BASV voice coil support.
- 4-layer coil for extreme power handling.
- Flat wire to better fill the air gap and obtain better reactivity.
- Aluminum wire (for the weight), plated with copper (to pass the intensity) of the CCAR type.
- The varnish which insulates the wire from the spool supports 280 ° C.
- Double screwed Nomex spider for easier replacement and more precise assembly.
- Paper membrane with ultra rigid fiberglass dust cover.
- Suspension capable of handling over 90mm of travel.
- Membrane and suspension with double stitching of red thread.
- Single coil with 2Ω impedance easier to connect and configure.
- Symmetrical terminal blocks accepting 10mm2 cables.
- Cables terminal blocks-coils double is sewn on the spider to easily follow the deflections of the membrane.
The weight of the RFL12 reaches 36kg. It comes in a wooden crate because the cardboard would not be enough. You need a hand truck or a pallet truck to move it. Its parameters are optimized for use in bass-reflex boxes.
It is built to reproduce music at a very high sound level, with force, and a riot of sensations. The RFL12 has nothing to do with the toys found in the sandbox ... RFL stands for "Really Fu .... Loud"!
Welcome to the extreme world, for real ...


• Very high performances superwoofer
• Total weight: 36Kg
• Delivered in a wooden box
• 14Kg 500oz magnetic structure weight
• 3,2Kg super reinforced aluminum frame
• 4" BASV very high temperature black aluminum voice coil support
• 280°c CCAW flat wire voice coil (Copper Clad Aluminum Wire)
• Double spider screwed to the frame for extreme reliability
• 35mm front plate for an enormous magnetic gap
• 35mm rear plate
• Voice coil with dual cooling system
• Spare recone kits available


• 38cm 15" Subwoofer
• Peak power: 10500W
• RMS power: 3500W
• Sensitivity: 92.0dB/2.83v/1m
• Impedance: 2Ω (Single coil)
• Coil diameter: 4 “
• BL factor: 26.0
• Response: 26Hz - 500Hz
• Depth: 24.5cm
• Weight: 38kg


• Fs : 32 Hz
• Mms : 383 grams
• Re : 2 Ω
• Cms : 0,06 mm/N
• Z : 2 Ω
• Bl : 26 N/A
• Qms : 5,81
• Sd : cm2
• Qes : 0,44
• Vd : liter
• Qts : 0,41
• Xmax mechanical : 47,5mm
• Xmax : 15,0mm
• Vas : 59,7 liters
• SPL 2,83V/1m : 92,0 dB
• Prms : 3500 Watts

Recommended efficient associations

Recommended amplifier: MTX RFL4001D


• Must have: legendary MTX SLH15U unloaded enclosure
• Recommended enclosures: 50 liters sealed or 84 liters vented (5 recommended enclosures in the manual)
• Recommended amplifier for one RFL15: one RFL4001D
• Recommended amplifier for two RFL15: one RFL4001D
• For SPL competitions, it is possible to use two RFL4001D in bridge on one RFL15


MTX wants you to enjoy your hearing for a long time. Excessive exposure to loud volumes can damage your hearing. The United States Department of Labor recommends not exceeding the following recommendations:

  • 90db : maximum 8 hours / day
  • 92dB : maximum 6 hours / day
  • 95db : maximum 4 hours / day
  • 97db : maximum 3 hours / day
  • 100db : maximum 2 hours / day
  • 102db : maximum 90 minutes / day
  • 105db : maximum 60 minutes / day
  • 110db : maximum 30 minutes / day
  • 115db : maximum less than 15 minutes / day
  • 120db : immediate danger, 0 minutes / day



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On the Web Side...

Presentation RFL12 and RFL15 @CineNow