SABINE FBX SOLO 620 SL-620 Operating Manual page 11

Select Phantom Power ON/OFF.
phantom power function disabled. If you wish to use phantom power, you may enable the
function by switching to "PHANTOM POWER - ON" on the back panel. The majority of low
impedance balanced non-phantom-powered mics are wired to ignore phantom power. Check
your microphone owner's manual for verification to avoid damage.
To initialize the SM-620:
Follow these steps to obtain the maximum gain before feedback without changing the tonal
quality of your program. Set up only one SOLO at a time. The following instructions are for
using the SOLO on the mains. For use with monitors, substitute monitor send and master
monitor control for input channel level fader and mixer master output. Be sure to turn off the
mains when initializing the SOLO in your monitor system.
1. Place the speakers and microphones in the positions where they will be used during the
program. Avoid placing microphones directly in front of speakers.
12. Set the mixer master output, all channel level faders, and the monitors to minimum.
13. Turn on the SOLO.
4. Turn on the mixer, any signal processing equipment, and finally the power amp. Press
the SOLO's RESET button until the LEDs stop flashing to clear out filters set previously.
15. If you are using a graphic EQ, adjust it only for the desired tonal qualities. DO NOT
NOTCH FOR FEEDBACK.
6. Be sure the SM-620 is in active mode. The "BY" LED will light green to indicate the SOLO
is in active mode and red if it is in bypass mode.
7. Turn the SOLO's clip level adjust to the two o'clock position.
8. Set the mixer master output to a nominal level, and lower all channel levels to minimum.
9. Slowly raise the channel level fader for the channel being set until feedback occurs. The
SM should quickly remove the feedback. The first FILTER LED will then blink to indicate
a filter has been set.
10. Keep raising the channel level fader slowly until all FIXED FILTERS and one dynamic
filter is set. Any uninitialized dynamic filters will be set later if feedback occurs during the
program.
11. Now lower the channel level fader slightly so that the system is not on the verge of
another feedback point. This is the maximum volume level the SM will be able to provide.
Higher levels will cause uncontrollable feedback.
12. Finally, during sound check, adjust the CLIP LEVEL ADJUST so that the red CLIP LED
blinks intermittently, as you would adjust the recording level of a tape recorder. The unit
will clip and distort the program if the CLIP LEVEL ADJUST is set too high. If it is set too
low, the signal-to-noise ratio will degrade and the system may hiss. The best adjustment
occurs when the clip levels of the SOLO and the final power amp are matched (when the
clip level indicators blink at the same time).
HOW TO USE THE "LOCK FIXED" FEATURE
In certain situations the FBX may mistake music for feedback and drive the fixed filters
deeper than necessary, like in a church with a pipe organ or during a performance with a
great deal of intentional sustained electric guitar feedback. You may prevent the fixed filters
from deepening beyond their initial depth by pressing the "LOCK FIXED" button on the front
panel AFTER setting the fixed filters as described previously. The "LOCK FIXED" LED will
light to indicate that the FBX is in "LOCK FIXED" mode. The fixed filters will stay locked until
you press the "LOCK FIXED" button again. The dynamic filters are not affected. In almost
every situation, it is best to lock the fixed filters right after the initial setup.
LIMITING THE TOTAL NUMBER OF ACTIVE FILTERS
You may choose to limit the total number of active filters for each application by using the
"LOCK FIXED" button. For example, if you wish to use only three fixed and one dynamic
filter, set the FBX so there are five fixed and one dynamic filter. Then during the setup
procedure, simply press the "LOCK FIXED" button after setting the first three fixed filters.
The remaining two fixed filters will be locked in their zero position.
SELECTING FILTER WIDTH
If the SOLO is to be used for a music application, 1/10-octave filters are most effective.
However, in spoken word applications, such as lectures or teleconferencing, the wider 1/5-
Your SM is delivered from the factory with the
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