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To facilitate proper set-up of your speakers in a variety of room situations,
we have included several heavy duty toggle switches on the terminal plate,
located on the back of the loudspeaker. All switches in the “up” position
represent the “anechoic flat” position.
Switch 1: can be used in the “down” position to provide a warmer sound
by shelving information above the 400 Hz by 2 dB. This can be helpful in
restoring system balance with closely miked program material or near field
listening positions. Switch 2: can be used in the “down” position to reduce
edginess in the lower treble region due to room flutter or bright program
material. Switch 3: is a low frequency impedance contour when using
amplifiers with high current capability. It is recommended that switch 3 be
left in the up position which converts the Classic from a traditional B4
alignment to a more sophisticated sixth-order Butterworth alignment, thus
reducing distortion in the octave above system resonance. Switch 4: can
be used in the “down” position to defeat the rear-firing ambience tweeter.
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