Interesting theories, however, a radar jammer is considerably smaller and wouldn't need liquid cooling.

1) Environmentally sealed mil-spec data port. Only used for adjustments and uploading settings. Power is fed by 7000 watt peak modified sinewave inverter. Power connections are not visible in this picture.

2) Coolant lines are low pressure UL 94 VO Rated ultra high purity perflouroalkoxy tubing with stainless steel quick disconnect bayonet fittings. Pressure tested up to 60 PSI at 300 degrees F. Maximum operating temp on unit is 190 degrees. PVC tubing is rated to 140 degrees max. PFA tubing is tested to -350°F to 500°F.

3) The unit is not powered up in this picture. For safety reasons, it is never operated while the vehicle is stationary or when people are in front of it. The bubbles are due to the fact that the unit is removed regularly for cleaning and adjustments. The air bubbles are bled off and cleared when the coolant pump begins to operate.

4) The liquid is tinted green and is low conductivity (0.36 micro Siemens). It is not anti-freeze. It is non-toxic and UV reactive.

5) On this point you are partly correct. This unit is not available to the public. It is not United States military technology and therefore does not fall under any military classification...yet.

I will neither deny nor confirm your conclusion in any public forum.

hmMmmm, i have a theory, based off these assumption (i konw, i know)

mounted in the front - offensive
infrasonic - << 15hz
7000W peak - LOTS of energy and not very efficient/directed, thus the coolant lines
not used when stationary and/or harmful to humans

so:
well, i figure since its infrasonic, and is driven by a huge power supply, it must affect the area directly in front of it. since the aperture (that we can see) is tiny, i assumed that dispersion takes place and spreads out and apparently at great distances b/c it uses infrasonic waves, this would mean that the emitted waves have the ability to defract sharply around bends in the roads, hills, ect. that AC supply suggests something powerful too, wires would melt @ 7000W if supplied by DC, too much resistance. besides, itd be quite stupid to convert DC to AC back to DC if it was powered off some kinda battery/capacitor.

i think its a radar/laser jammer; not an electronic kind, instead a physical kind. since sound waves are compressions and expansions of the medium that they travel through, i would imagine this device has the power to change the index of refraction of the air either directly infront of it (or if its tied into the chassis) the air around the car with infrasonic waves. this would mean that incoming photons (laser, radar) would have "zig zag" through the different indicates of refraction as they are traveling to, and bouncing away, from the car, slightly increasing the distance they have to travel and/or curving them (literally) away from the car. heh, kinda like a force field.
what does this mean? a radar/laser gun assumes that the speed of light in the detecting medium is constant...and it is, assuming constant density. this device might change the density of that medium (air) oh so slightly so that it throws range finders/speed detectors out of whack by varying that constant. *think* heat shimmer on the roof of a car on a sunny day, hot air immediately over searing metal is less dense than the cooler air far from it, so the light gets messed up (meaning bent) as it passes through that area en route to your eye. this device does something similar, changing the density of the air with sound wave *think* bomb blast shock wave or LOUD sub woofer* instead of heating it, or, it might heat it too. so in a nutshell i think its a ultra ultra low frequency sub woofer jacked up on 'roids.

my .02

all this is theoretically possible w/ enough energy, you could detonate concussion bombs infront of a car with the same effect, this just might be a simpler way to do so.