Troubleshooting Tips - SABINE FBX SOLO 620 SL-620 Operating Manual

TROUBLESHOOTING TIPS

Q. Can I patch the SOLO SL-620 after the mixer and before the power amp, just like other
FBX models?
A. Yes, but only in cases where just six feedback filters are needed, such as on the moni-
tors alone. Six FBX filters may not provide enough gain before feedback for your entire
mix.
Q. Sometimes I don't get enough gain before feedback. Why?
A. Gain before feedback is determined by the number of fixed filters you set; increasing the
number of fixed filters during setup increases the system's gain before feedback. Fixed
filters are set automatically during the initial setup and remain on the initially detected
feedback tone -- they do not move. You can reconfigure the filters from the factory
default setting (four fixed and two dynamic) to any combination of fixed and dynamic
filters. Review the procedure on page 9 ("UNDERSTANDING FIXED AND DYNAMIC
FILTERS") of this operating guide.
Q. The CLIP LEVEL LEDs do not light. The unit will not catch feedback. Why?
A. The unit is not in the signal path. Check the connections.
Q. Why does one of the FILTER ACTIVITY LEDs blink?
A. The last filter to be automatically updated blinks. During normal operation, the blinking
will move from filter to filter as the SOLO finds new feedback points. This gives the user
a visual confirmation that the unit is functioning properly.
Q. Why would the FBX cause a noticeable hum?
A. It may hum if the system is improperly grounded. Check for bad grounds.
Q. Why does my system sound thin and muffled?
A. Place the SOLO in BYPASS MODE. If the system still sounds thin, your problem is
probably with improper use of a graphic EQ. If the problem exists only with the SOLO in
ACTIVE mode, verify the clip level setting, reinitialize the system and lock the fixed
filters.
Q. With the SL-620 in the insert point, I hear no audio. Why?
A. Your insert point may be wired opposite to the SOLO. Try reversing the tip and ring (in
and out) of your Y-cord. If you are using a single TRS cable, you will have to reconfigure
one end of it to conform to your mixer insert point.
Q. Will the SOLO eliminate feedback in both mains and monitors?
A. Yes, but for maximum gain you should set as many fixed filters as possible on the
system with the most feedback problems. Choose which system is more likely to have
feedback, and follow the system initializing procedure for either mains or monitors.
During program, the dynamic filters will control feedback for both mains and monitors if
they are in use, but only on the input channel the SOLO is patched into.
Q. The channel I have the SOLO in seems noisy. What can I do?
A. If the noise floor is too high, you need to readjust the gain structure of that channel.
Follow the SOLO initialization instructions in this guide.
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