DBX goRack [14/31] Option application type description

PERFORMANCE PROCESSOR

Available Anti-Feedback Options

The Anti-Feedback options available in the goRack allow you to adjust the width of the notch filters. A description of each of

these options is provided in the following table.

Anti-Feedback Width Options

Option Application Type Description

MUSIC

(NARROW)

This setting has a constant bandwidth of 8 Hz below 927 Hz and a

constant Q of 116 at or above 927 Hz. This option is optimized for live

music sound reinforcement and offers the highest level of sonic quality.

When this option is selected, the AFS algorithm will zero in on the

offending feedback frequency, while leaving the surrounding frequencies

unscathed. With this option selected, the AFS filters will take slightly

longer to set than when using the MUSIC/SPEECH setting, although the

difference in time will be quite negligible.

MUSIC/SPEECH

(MEDIUM)

This setting has a constant bandwidth of 9 Hz below 260 Hz and a

constant Q of 29 at or above 260 Hz. This option is optimized for live

music or speech sound reinforcement and provides the best all-around

protection. It will provide the best combination of fast feedback

suppression and precision, using filters slightly narrower and less audible

than the SPEECH setting, but slightly faster than the MUSIC setting. If

you’re not sure which setting to use or the system is being used for music

and speech sound reinforcement, select this option.

SPEECH

(WIDE)

This setting has a constant bandwidth of 11 Hz below 76 Hz and a

constant Q of 7 at or above 76 Hz. This option is optimized for speech

sound reinforcement, where wider notch filters are less noticeable. Select

this option when using the sound reinforcement system for speech only.

With this option selected, notch filters will be wider, but will provide the

fastest, most solid protection against feedback.

WARNING! If AFS is turned on and filters are set (in use), be careful when turning AFS off, as all filters will be

immediately removed from the signal path and sudden feedback could occur. It is recommended that you lower your mixer

output volume or the goRack’s output volume before turning AFS off.

NOTE: When all the AFS filters have been set, they will begin to round robin – meaning that if all filters have been set

and new feedback occurs, the first filter set will be released then re-set at the new feedback frequency location.