HLH 100 Series
100 Watt Tube Amplification

TECH SPOTLIGHT: POINT-SOURCE and PHASE COHERENCY

A “point-source” effect is created when speaker drivers are concentrated in a location such that the listener experiences focused sound coming from a specific location. Phase-coherent sound allows for full sound to travel over greater distances and cover a larger area with less loss due to phase distortion or phase collision.

The HLH 312 speaker enclosure from 3RD POWER is designed to deliver point-source performance with outstanding phase coherency due to its' unique cabinet design and speaker arrangement. The result: a wide frequency range, full sound output throughout the entire listening area - without all the comb-filtering lobes or loud midrange frequency “beam” associated with typical 4x12 speaker enclosures.

The graphic above illustrates the 6 primary arrays that occur in typical 4x12 enclosures. These arrays often interact with each other such that significant phase distortion and array collisions occur degrading the radiated sound waves resulting in sound that dramatically changes in quality as you walk around.

With only 3 primary arrays, the HLH312 enclosure delivers a 50% improvement over the typical 4x12. Additionally, each driver is placed as close as possible to one another improving time alignment. Another contributor to the high performance of the HLH312 again has to do with it's unique design resulting in a major reduction in parallel internal surfaces (6 in a 4x12 and only 2 in the HLH312). This minimizes internal standing waves and allows the cabinet and the speakers to work together more efficiently.

The result is an amazingly rich, thick guitar tone that's smooth and even sounding throughout the entire performance area.



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