18 Inch Subwoofer

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UXL-18 – The Next Level

We are confident the UXL-18 will meet your design criteria for the very bottom octaves.  Regardless of room size, it will deliver low distortion, intricate yet subtle bass tones for even the most devoted music listener.  For home theater, expect the UXL-18 to provide you with sub-sonic output into the single digits with the right setup.  Use a single UXL-18 in a sealed, Bass Reflex/EBS enclosure, or multiple units in an Infinite Baffle configuration.  Whichever method you decide to use, you will achieve bass so low you will literally be able to count the sound waves as they pass you!



The PS voice coil made exclusively by Mach 5, combines the very best technologies available.  It starts with a special non-metallic former, used because it does not generate eddy currents in the magnetic gap like metallic formers do.  This in turn reduces distortion significantly.  Heavy coated aluminum wire is CNC-spun using glues that have temperature ratings exceeding the magnet wire coating itself.  The adhesive is then heat bonded to ensure long lasting operation – a very time consuming and expensive process.

From our machine shop comes a CNC-turned magnet structure using quality North American steel parts, high energy ferrite magnets and strong adhesives.  Aluminum demodulating rings are applied to minimize distortion and a non-ferrous shield is placed within the motor to cut down on stray flux.  Like the PS voice coil, these modifications are something you may never see, but the sonic improvements will be nothing short of spectacular.

When dealing with the stress of very high excursions you need something that will maintain conformity.  We chose a dual layer craft pulp/carbon fiber diaphragm to achieve this goal as it provides both excellent damping effects and very high shear strength.  And let’s face it, the carbon fiber is pretty sexy too!

  • 76mm PS  series low distortion voice coil
  • Heavy Craft pulp/Carbon fiber cone
  • Extra wide heavy foam surround for high excursion
  • Conex spiders with double woven tinsel leads
  • Heavy cast aluminum basket
  • Large spring loaded connectors
  • 1200 watts RMS power handling
  • Excellent for home audio and home theater
  • 34mm Xmax excursion for maximum output
Fs (Hz) 18.6
Re (Ohms) 3.2
Qes 0.29
Qms 9.70
Qts 0.28
Cms (mm/N) 0.192
Rms (kg/s) 4.58
Mms (grams) 380.1
BL (Tm) 22.33
VAS (L) 285.5
Sd (cm^2) 1029.2
Lp (2.83v/1m) 94.1
  • Outside Diameter – 47cm
  • Mounting Diameter – 42.4cm
  • Mounting Depth – 24.1cm
  • Sealed –
  • Bass Reflex –
  • EBS –
  • Infinite Baffle – *


  1. | :

    I’m running two of these in Submaximus V3 enclosures. To say they’re impressive is an understatement. I toss a channel of an inuke6000 at each one and the Uxl soaks it up and continues to perform flawlessly.

    I also have a pair in 4cuft sealed enclosures and these things dig deep and give more clean undistorted bass than any sane individual would ever need.

    Also they’re the prettiest sub driver I’ve ever laid eyes on.

    Keep up the good work Mark.

  2. | :

    I have 2 of these in a dual sealed box. These things pressurize my basement. I push these with a Behringer NX3000 bridged at 3000 watts.

  3. | :

    I’m running four of these in “Full Marty” vented boxes powered by two inuke 6000DSPs.

    I’m fully satisfied with these subs and recommend them!

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