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A rear firing 1” titanium dome ambience driver (defeatable via switch 4) is
used to enhance treble distortion. This driver allows the sound staging and
“air” of a dipolar response without the ragged midrange anomalies and
cancellation effects. An additional advantage of the rear tweeter is the
preservation of depth. An inherent limitation of the stereo process dictates
that depth is largely determined by amplitude differences; i.e. the louder
the source, the closer it can appear. This can cause a saxophone player,
for example, to jump forward every time he emphasizes a note. This
occasionally makes even accurate speakers feel aggressive.
The rear tweeter helps to stabilize the soundstage by establishing a
balance between the front and rear output, resulting in more uniform
power distribution.