Harman JBL CSM-21, User Manual

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6.5 Using 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 with a slope of 24 dB per octave), forming a full subwoofer
crossover. When the XOVR switch is NOT engaged, the main speaker outputs and the subwoofer out-
puts are full-range.
6.6 Setting Up AutoWarmth™ Method 1
To set up AutoWarmth™ begin by turning the AutoWarmth™ trimmer to the twelve o’clock position. Use
this as your “baseline” setting. Now turn up the source volume (on 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 (on front panel) to the highest volume at which that zone will be operated. Adjust the Auto-
Warmth™ 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.