Genesis Advanced Technologies 1.1 The Technology, 4.1Design Philosophy Dipolar Line Source

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4 The Technology

The Genesis 1.1 comprises four columns: two midrange/tweeter “wings” and two bass towers. Each module is 7 ½ feet tall (228cm), and covered in fine rare-wood veneers or high-gloss painted finishes.

The dipole midrange/tweeter column houses a 6-foot line source ribbon midrange, and twenty-six ribbon tweeters in a line-source array. Each bass tower houses six 12” aluminum cone woofers, each woofer servo-controlled with its own 500 watt bass amplifier housed in a six- channel amplifier chassis.

The complete Genesis 1.1 system, consisting of the six separate elements, weighs over 2,640 lbs (1,200kg).

4.1Design Philosophy: Dipolar Line Source

Nothing has changed in theoretical acoustics since Lord Rayleigh’s original book on acoustics published in 1877. There are still only two proper ways for a loudspeaker to propagate sound in a room: a point source and a line source. Anything else, or everything in between, is a compromise.

In order for all frequencies of sound from the loudspeaker to reach the listener at exactly the same time, a coherent wave front is important - not just “time-alignment” of drivers. The ideal is either an infinitely small pulsating point or a pulsating line with a size on the order of the room dimension.

Obviously, an ideal line-source is much easier to mechanize than the ideal point source. The line-source (if large enough), can approach the

John William Strutt Lord Rayleigh (1842 – 1919) ideal, and in doing so, provide sufficient radiating area for

dynamically and spatially realistic sound reproduction.

The Genesis 1.1 is a near perfect line-source that is 7.5 feet tall (nearly the room’s entire height). A line source has no vertical dispersion at any frequency. Hence there is no sound bouncing from either the floor or the ceiling. No deleterious interference from these surfaces is created (as in virtually all other kinds of speakers).

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