8
SELECTING THE CROSSOVER MODES
The Reference705 incorporates a sophisticated, fully adjustable electronic crossover for each of its
two pairs of channels and subwoofer channel. The Reference705 can drive a full system without
need of an outboard electronic crossover.
Before installing the amplifier, make certain the switches on the bottom are set to the correct
positions. After setting the switches, be sure to install the hole plugs included with the amplifier.
LOW PASS
The subwoofer channel is designed to operate in low pass or full range. The low pass is a continuously
variable 24 dB/octave electronic crossover with a range of 30 - 120 Hz.
2-WAY
HIGH PASS
The high pass crossover is used for sending only midrange and high frequency information to particular
speakers. Activate the high pass crossover to drive satellite or coaxial speakers in the system along with
subwoofers. You can later adjust the exact frequency from the front of the amplifier. The high pass
frequency can be adjusted separately for either pair of channels of the amplifier.
REAR FILL DE-EMPHASIS
The Reference705 features an innovative rear fill de-emphasis circuit which places more emphasis on the
front stage when used in the five channel mode. The circuit removes frequencies above 7,000 Hz at the
rate of 6 dB/octave. By removing upper frequency information from the rear fill, a more natural sounding
rear fill effect is created.
3-WAY
MIDBASS/MIDRANGE BAND PASS
The Reference705 can be operated in midrange or midbass “band pass” configuration. In the 3-way
mode, you can tri-amplify with “active” midbass or midrange to maximize control over individual drivers.
The bandpass includes a low pass and a high pass filter, which work independent of one another, to drive
the midrange or midbass speakers. In 3-way crossover mode, channels 1 & 2 become HIGH PASS, and
channels 3 & 4 become BANDPASS. (NOTE: In 3-way mode, channels 3 & 4 inputs are not used.)
INSTALLATION STEP 2
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