Peavey VSX II Manual page 10

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( ( 4 4 1 1 ) ) C C h h a a n n n n e e l l 2 2 H H i i g g h h O O u u t t p p u u t t
Channel 2 high-pass frequency band output in stereo MODE. In mono MODE this output is the unit's only HIGH
frequency band.
O O p p e e r r a a t t i i o o n n N N o o t t e e
When a standard two conductor phone plug is inserted into a TRS jack, the system becomes unbalanced.
Such connection should be made only when the associated equipment is in close proximity to the VSXII.
The XLR input and 1/4" input are in parallel. If a two-conductor phone plug is used in the 1/4" jack, both
inputs become unbalanced. If a three-conductor phone plug is used to patch to associated equipment
which is unbalanced, the entire channel becomes unbalanced.
S S e e t t u u p p P P r r o o c c e e d d u u r r e e s s
To achieve proper system set up and to provide good system performance and reliability, all the system
component (loudspeakers') efficiency rating and crossover frequency values must be determined and used
according to the procedure described bellow. Special attention should be paid in mono, single-channel 3-way
MODE, so that the LOW-TO-MID crossover frequency control (8) will not be set higher than the MID-TO-HIGH
crossover frequency control (25).
Step 1:
The efficiency rating of the low frequency enclosure becomes the "reference efficiency" for the entire
system. The level control associated with this band-pass should always be set at 0 dB. Example: A
system's low frequency component has an efficiency rating of 100 dB at 1 W, 1 M, 100 dB is the "reference
efficiency" for setup.
Step 2:
For 3-way systems, the MID band level (Channel 2 low) setting will be the difference in efficiency rating
between the low and mid components. Example: The system's mid frequency component efficiency is 99 dB at
1 W, 1 M, 100–99 = +1 dB. The MID band level setting (Channel 2 low) should be +1 dB.
Step 3:
The HIGH band level setting will be the difference in efficiency rating between the low and high components.
Example: The system's high frequency component efficiency is 106 dB at 1 W, 1 M, 100–106 = -6 dB. The HIGH
band level setting should be -6 dB.
Step 4:
The crossover frequency adjustment must be correct for the various components in the system. These values
are usually, but not necessarily, the cut-off frequencies of the associated loudspeakers. Crossover frequencies
are sometimes selected to improve the "power sharing" for a given sound system application. These selections
should never be below the cut-off frequency values.
Step 5:
For 2-way or 3-way system, the 40 Hz filter may be activated if desired. This feature protects subwoofers from
operating below their cut-off frequencies and preserves headroom.
Step 6:
Adjust the gain control as described in the gain section.
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