Loudspeaker Components -3
Cabinet
Functionally, any loudspeaker enclosure provides a mechanical placement of
each transducer, a method for suppressing acoustical radiations, and a resonant
chamber to extend low frequency performance. The P-39F is an artistic blend of
beauty and functional performance. Its industrial design was guided by the
global consultancy of BMW Group DesignworksUSA.
Enclosure resonances can be suppressed through the geometry of the
enclosure and mass of the panels. The P-
39F enclosure contains nonparallel wall
structures and thick, high mass walls.
Nonparallel wall structures significantly
decrease standing waves. Cabinet wall
thicknesses are a minimum of 1” thick with
an even thicker front baffle. Custom inner and outer laminated panels sandwich
a middle layer of dissimilar material designed with a different mechanical
impedance to ensure the cabinet does not color the sound.
To further increase enclosure stiffness four “H” braces are strategically positioned
in the enclosure to reinforce the structure, control resonance and minimize
modal standing waves. The massive front baffle design allows all woofers and
the mid/high horn structure to mount flush to the exterior edge. The width of
the front baffle has also been minimized to decrease the total area. A smaller
front baffle directly correlates into improved off-axis performance. The overall
enclosure was designed to extend the low frequency response of the three
woofers to 39Hz (-3dB). This fourth-order vented enclosure contains three
custom flared, tuned ports cleverly blended into the rear of the curved
enclosure. Just below the ports a high mass aluminum and steel base is
integrated into the bottom of the enclosure. The base contains four adjustable
floor anchors which decouple the cabinet from the floor by supporting the
cabinet at just four points.
Tractrix® Horn Design
Horn-loaded technology is the driving force behind the remarkably
accurate Klipsch sound. Horns offer high efficiency, low distortion,
controlled directivity and flat frequency response, allowing them to
more closely reproduce the quality and tonal characteristics of live
sound. In the P-39F, the high and mid-frequency drivers both use the
latest evolution of our Tractrix® horn design featuring a 90° x 60°
coverage pattern and a lofted throat design for exemplary on-axis
response. These horns have been molded as a single unit using a
proprietary, acoustically inert, carbon-infused thermoset composite
material. The high and mid-frequency drivers are connected to the
horns via chamber-dampened phase plugs that result in a 4:1 compression ratio delivering remarkable efficiency
with astonishingly low distortion. This arrangement allows the P-39F to provide a unique combination of precision,
clarity and effortless power.
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