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6.5 Using the Subwoofer Crossover
When the XOVR switch is engaged, the main speakers are high-passed at 125 Hz and the subwoofer
outputs are low-passed at 125 Hz (both using a Butterworth 24 dB per octave filter), forming a full
subwoofer crossover. When the XOVR switch is NOT engaged, the main speaker outputs and the
subwoofer outputs will all pass a full-range signal.
6.6 Setting Up AutoWarmth™ Method 1
To set up AutoWarmth™, begin by turning the AutoWarmth™ trim pot to the twelve o’clock position. Use
this as your “baseline” setting. Now turn up the source volume (located on the front panel) to a typical
operating level for that zone. Check the AutoWarmth™ indicator LED, on quieter passages the indicator
should flash green. If it does not, start turning the trim pot clockwise until it does. If the indicator is
constantly on, turn the trim pot counter-clockwise until it flashes only occasionally.
Then adjust the bass and treble tone controls for that zone. To check the adjustments, turn the volume
down to as low as its ever going to be used in that zone and make sure the tone sounds full enough.
If not, then turn the AutoWarmth™ trimmer further clockwise to increase its effect. Go back and forth
between typical level, low level, and high level. Adjust AutoWarmth™ for the best overall sound at all the
compared levels.
6.7 Setting Up AutoWarmth™ Method 2
An alternate method is to turn the AutoWarmth™ trimmer full counter-clockwise. Turn the Source volume
(located on the front panel) to the highest volume at which that zone will be operated. Adjust the
AutoWarmth™ trimmer clockwise until the green LED just starts to light on musical peaks. Then turn the
AutoWarmth™ trimmer back counter-clockwise until it does not light at all. Next turn the zone’s level down
to normal operating level and adjust the bass and treble controls for that zone, the AutoWarmth LED will
light.
With either of these setup methods, AutoWarmth™ should shut off when operating at higher volumes and
be lit at both normal and lower volumes.
