The A200 is a high
performance three-way loudspeaker system designed for optimum reproduction of
music under actual home listening condition. Its design takes particular
advantage of recent research about the colorations which can be caused by
off-axis sound radiation when it reflects off parts of the speaker, is
diffracted at cabinet edges, and is strongly reflected off floor and wall
surfaces near the speaker.
These reflections
have been controlled in the A200 by the shape of the cabinet and careful
attention to the placement of the drivers, yielding a speaker system which
exhibits a remarkably uniform and accurate tonal balance, exceptionally good
stereo imaging, and relatively high efficiency.
The 10" woofer
is mounted near the floor and the shallow cabinet permits convenient placement
near a wall behind it. Consequently the woofer behaves acoustically as if it
were flush-mounted at the floor-wall intersection, radiating uniformly into the
90-degree solid angle formed by that intersection with all reflections
remaining in-phase with the woofer's direct output, preserving its smooth
response and raising its efficiency.
The 4-1/2"
midrange and 1" soft dome tweeter are positioned near ear level for realistic musical imaging. They
are flush-mounted in an unusually large and smooth front-panel area, so that
the nearest cabinet edge or reflecting object is more than a half-wavelength
away at any frequency in their operating range.
Consequently the drivers radiate essentially a hemispheric wave front,
and the control of early reflections permits their smooth response to be heard
to full advantage.
The infinite plane
enclosure
The A200's enclosure
design isn't a cosmetic "sales feature". It is calculated
specifically to restrict the amount of sound than can reach the rear wall and
floor, especially at the crucial midrange frequencies that determine a
speaker's tonal character and imaging capability.
The A200's unusually
large and smooth front panel makes the midrange and high frequency drivers
behave as if they are mounted into an infinitely large plane extending beyond
the baffle. As a result, they acoustically "see" only the hemispheric
space in front of the cabinet, eliminating the early reflections that can color
their sound and blur the stereo imaging.
Dealing with bass
frequencies and their very long wavelengths required a different solution. By
mounting the woofer close to the floor, floor reflections remain in phase,
reinforcing the woofer's output and preserving its smooth response.
Another benefit of
the A200's tall, slim cabinet is the opportunity to mount the midrange and
tweeter near ear level to enhance the sonic perspective. Mid and high frequency
information emanates at the proper height in space, eliminating the
"highs-at-knee-level" phenomenon of typical cabinet shapes.
Specifications:
Drivers:
Low-frequencies :
10" (250 mm) acoustic suspension woofer
Mid-frequencies
: 4-1/2" (120 mm) midrange with
ferrofluid
High-frequencies
; 1" (25 mm) soft dome tweeter with
ferrofluid
Crossover
Frequencies: 450 Hz and 3000 Hz
Sensitivity: 1 watt produces 90 dB at 1 meter
Impedance: 8 Ω nominal
Low Frequency
Response " -3 dB at 36 Hz
Driver Fuses:
Tweeter : 1,5 A
Midrange : 2 A
Dimensions (H x W x
D): 1040 x 530 x 160 mm (41" x
21" x 6-3/8")
Weight: 27 kg (58 lbs)
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