what is this: http://www.parts-express.com/pe/showdetl.cfm?Partnumber=299-850

And how the hell do i use one?

I had replied to this last night.....but;

http://tymphany.com/categories/tymphany-lat

How it Works

In a dramatic departure from conventional cone transducers that displace air across a single diaphragm, the Tymphany LAT displaces air using a linear array of multiple smaller diaphragms. The result is a more efficient transducer geometry for a given SPL. The balanced drive design is comprised of a series of coupled diaphragms that are driven by opposing end motors. One motor drives half of the diaphragms, while the other motor drives the other half in opposition. Sound radiates through multiple flow ports along the side of the housing. The transducer can be mounted either horizontally or vertically into much shallower and narrower boxes than conventional drivers.

Efficient Form Factor - The revolutionary Tymphany LAT brings bass where it could never go before as a result of its breakthrough design and sleek profile. For example, the Tymphany LAT 250 is equivalent to an 8" woofer, the Tymphany LAT 500 packs the power of two 10" subwoofers into a thin tube-shaped transducer only 5" wide, and the Tymphany LAT 700 offers the equivalent of two 12" subwoofers in a streamlined 7" width.

In plain english;

It is a subwoofer. Inside of the "tube" are multiple smaller diameter cones, all connected together to motors at each end of the structure. There are holes on both the front and rear of the tube, which allows the sound pressure to enter the listening space and creates the "frontwave" and "backwave". The purpose in the unique design was to allow for more cone area in a smaller package, ideally taking up less overall room than a standard speaker.

The other models are also available at Madisound;

http://www.madisound.com/catalog/index.php?manufacturers_id=175