The Legacy Whisper XD design radically increases piston
area in the forward plane extending bandwidth, sensitivity, and frequency
range. Because the design is open air, the system is virtually free of
enclosure resonance and room limitations. Flaunting the latest in ribbon and
cone technology, the elegant monoliths look just as dramatic as they sound.
The Whisper XD differential alignment is analogous to a dual
element microphone. Signals from the two baffles are combined acoustically
with time compensation to steer the low frequency wave-launch forward, while
creating a progressively reduced acoustic output to the sides until reaching
a null at 90 degree off axis. This eliminates boundary interactions from
sidewalls, ceiling and floor. The gradient acoustic pressure reaching the
listener at each ear contains far less room noise, allowing the brain to
lock in on the natural ambience in the recording.
The sweet spot is much wider with the Whisper XD design,
allowing the listener to move outside the left speaker and still hear a
balance with the right speaker, and vice-versa. The manual recommends a
strong toe-in, to cast the strongest acoustic shadow across the face. It
explains that the imprint of the shadow of the nose into the opposite ear is
the other portion of the stereo signal that is usually washed out by
excessive room reflections with conventional speakers.
The nearly six foot towers host dual 15” woofers on each
of the two baffles, which are spaced less than four inches apart. The
woofers pumped in the same direction, so the pressure change between the two
is virtually zero (reminiscent of the magnetic caterpillar drive from the
Red October submarine). The midrange is covered by a carefully positioned
array of four cast frame drivers with a silver-graphite/rohacell diaphragm.
Highs shimmer from the neodymium ribbon tweeter and pleated ribbon super
tweeter. The ‘plug and play’ 24-bit Whisper system allows adjustment of
channel separation, low frequency contour and proximity via the proprietary
algorithms included in the Wave-launch processor. For the tube lovers, the
upper portion of the highly sensitive speaker can be driven by the user’s
choice of amplification. Most refreshing is the cost of the high end system;
a down to earth $19,995 in standard finish.