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1. INTRODUCTION
With the FEEDBACK DESTROYER PRO you have purchased a highly useful device for the control of sound
reinforcement systems, which will enable you to focus your attention on what is essential: your music. The
fully featured FEEDBACK DESTROYER PRO not only suppresses feedback but also incorporates a wealth of
additional functions in one single unit. Its 24 separate filters can be edited in all parameters and automatically
detect and suppress feedback frequencies. With its pro-level internal signal processing circuitry, the unit can
also be used as a high-end equalizer for stage and studio applications. The MIDI interface allows for integrating
the FEEDBACK DESTROYER PRO into any MIDI system, and the open system architecture enables you to
update the system software whenever you want. In short: the BEHRINGER FEEDBACK DESTROYER PRO
was built for the next millennium.
+ The following operational manual will introduce you to the BEHRINGER
FEEDBACKDESTROYERPRO and its various functions. After reading the manual carefully,
make sure it is always on hand for future reference.
1.1 The design concept
Despite extensive computing work which is done in the DSP1100P by a dual-engine 24-bit processor, the
FEEDBACKDESTROYERPRO can be operated easily and conveniently. All parameter edits are performed
with the jog wheel (rotary control). 10 presets are available to store user-defined programs.
The philosophy behind BEHRINGER products guarantees a no-compromise circuit design and employs the
best choice of components. Top-quality 20-bit AD/DA converters which belong to the best components avail-
able owing to its outstanding specifications and excellent sonic characteristics. Two 24-bit DSPs are used as
the heart of the FEEDBACKDESTROYERPRO. These perform the precise calculations needed for the pro-
cessing of the complex algorithms. Additionally, the FEEDBACKDESTROYERPRO uses high quality resis-
tors and capacitors with very tight tolerances, high-grade switches, low-noise operational amplifiers (type
4580) as well other selected components.
The FEEDBACKDESTROYERPRO DSP1100P uses SMD technology (Surface Mounted Device). These
subminiature components known from aerospace technology allow for an extreme packing density, improving
the units reliability even further. Additionally, the unit is manufactured in compliance with a ISO9000 certified
management system.
1.2 Before you begin
Your BEHRINGER FEEDBACKDESTROYERPRO was carefully packed in the factory and the packaging
was designed to protect the unit from rough handling. Nevertheless, we recommend that you carefully examine
the packaging and its contents for any signs of physical damage, which may have occurred in transit.
+ If the unit is damaged, please do not return it to us, but notify your dealer and the shipping
company immediately, otherwise claims for damage or replacement may not be granted.
Shipping claims must be made by the consignee.
The BEHRINGER FEEDBACKDESTROYERPRO fits into one standard 19" rack unit of space (1 3/4"). Please
allow at least an additional 4" depth for the connectors on the back panel.
Be sure that there is enough space around the unit for cooling and please do not place the
FEEDBACKDESTROYERPRO on high temperature devices such as power amplifiers etc. to avoid overheat-
ing.
+ Before you connect your FEEDBACKDESTROYERPRO to the mains, please make sure that
your local voltage matches the voltage required by the unit! (see chapter 5 for details)
The mains connection of the FEEDBACKDESTROYERPRO is made by using a mains cable and a standard
IEC receptacle. It meets all of the international safety certification requirements. Please make sure that all
units have a proper ground connection.
+ Please ensure that only qualified persons install and operate the FEEDBACKDESTROYERPRO.
During installation and operation the user must have sufficient electrical contact to earth.
1. INTRODUCTION