Subbass Use (Optional); General Recommendations; Accessories - Nexo PS Série Manuel D'utilisation

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SubBass Use (optional)

General Recommendations

The SubBass section of the TDcontroller is monophonic (the Left and Right channels are summed at the
input of the Controller). In a Stereo SubBass installation using 2 TDcontrollers, bear in mind that when
only one Controller input is used, this will lower the gain of the Sub Output by -6 dB (as the nominal level
is calculated for a 2 input use). You can either increase the gain setting of the LSub with the front panel
level control or use a Y adapter to feed both inputs of the controller with the same signal. A switch inside
the Analogue TDcontroller allows this setting to be made internally. (See "Sub jumper" page 21 )
For best results the LSubs should be positioned as close as possible to the PS loudspeakers and aligned
with respect to the audience. This helps to avoid interference near the crossover point.
Although sometimes in conflict with the above recommendation, LSubs' low frequency performance is
enhanced if multiple subs are grouped together. This also applies to Stereo installations using mono
LSub output where left and right Subs can be grouped together in the center for best effect.
The nominal efficiency data for LS400, LS500 and LS1200 and the standard Sub level settings on the
TDcontroller are for LSubs positioned on the floor (half-space). For other system configurations, and
particularly for « flying » subs, the low frequency sound pressure can be -3 to -6 dB lower. This can be
compensated for by a higher setting on the LSub output level control and/or by adding more SubBass
units.

Accessories

SAFETY recommendation for all accessories
Always inspect all components for damage before assembly. If you suspect that any of the
components are defective DO NOT USE THE AFFECTED PARTS.
Carefully read the assembly instructions shipped with each accessory.
Secondary safety steels must be installed once the system has been flown to operating height.
Secondary steels must be fitted irrespective of the local safety standards applicable to the territory.
When deploying the flying accessories, always wear protective headwear, footwear and eye
protection.
Do not allow inexperienced persons to handle flying systems. Installation personnel should be
PS SERIES MANUAL REV3 10/10/05
LOUDSPEAKERS