Behringer FEEDBACK DESTROYER PRO DSP1100P User Manual

1User´s ManualFEEDBACK DESTROYERDSP1100English Version 1.1 May 1998The information contained in this manual is subject to change without notice. N

10s The microphones used are not operated in accordance with their directivity (e.g. cardioid/super-cardioid).s The acoustic properties of the room ar

11you will also fade out many music signals which you’d actually wish to keep. Additionally, cutting thesemidrange frequencies also means that your P.

122. THE CONCEPT2.1 The quality of components and circuitBehringer’s philosophy guarantees both perfect circuit design and no-compromise selection of

133. INSTALLATIONThe FEEDBACK DESTROYER was carefully packed in the factory and the packaging was designed toprotect the unit from rough handling. Nev

143.4 Selecting the operating levelWith the „Operating Level“ switch on the rear of the Behringer FEEDBACK DESTROYER you can adjust theinternal operat

154. CONTROL ELEMENTSFig. 4.1: Front panel controls elementsThe Behringer FEEDBACK DESTROYER is equipped with ten parameters keys, one jog wheel (rota

16+ Please, use the Total-Bypass function only with utmost caution because by deactivation, theFEEDBACK DESTROYER possibly unlocks suppressed feedback

174.3 Rear control elements17 18192021Fig. 4.4: Connectors and control elements on the rear of the FEEDBACK DESTROYER17Use the Operating Level switch

185. OPERATIONThe Behringer FEEDBACK DESTROYER can operate in four different modes. To meet more complex re-quirements with regard to flexible signal

195.4.1 Recalling programsAfter power-up, the FEEDBACK DESTROYERs display reads the number of the preset last used. The jogwheel allows you to conveni

2acc. to the Directives89/336/EWG and 73/23/EWGWe, BEHRINGER INTERNATIONAL GmbHHanns-Martin-Schleyer-Straße 4D - 47877 WillichName and address of the

20In Single-Shot and Auto mode it is not possible to change the filter parameters. In these modes you only areallowed to call up the parameters. Howev

21The fifth page of the MIDI menu shows the “store enable“ flag represented by a capital „S“ in the display. Thevalue “0” disables the reception of co

22sampling rate. The sampling rate determines the effective audio frequency range. The sampling rate mustalways be more than twice the value of the hi

23Take the following simple example using a sine wave. If an analog signal starts to overload, it results in theamplitude of the signal reaching a max

246. APPLICATIONSThe Behringer FEEDBACK DESTROYER features a high level of flexibility not only in the field of feedbackelimination. The following cha

25the monitor path and in single channels with critical signals. If there is no other way to eliminate feedback, youcan insert the FEEDBACK DESTROYER

26Master OutP.A. SystemSub-GroupInsertChannelInsertFig. 6.2: Inserting the FEEDBACK DESTROYER in single channels and sub-groups6.4 Using the FEEDBACK

276.6.2 Digital overflowWhen using the FEEDBACK DESTROYER as a parametric equalizer (Parametric EQ mode) and applyingextreme attenuation values in the

287. FREQUENCY CHARTIn order to maintain a better survey only every second value is registered in the table. The adjustable values donot exactly fit i

298. MIDI IMPLEMENTATIONFunction Transmitted Recognized RemarksBasic ChannelDefaultChangedOFF, 1 - 16OFF, 1 - 16OFF, 1 - 16OFF, 1 - 16memorizedModeDef

3SAFETY INSTRUCTIONSCAUTION: To reduce the risk of electrical shock, do not removethe cover (or back). No user serviceable parts in-side; refer servic

309. SPECIFICATIONSAnalog InputsType 1/4” (6.3 mm) TRS unbalancedImpedance 100 kOhmsNominal Operating Level -10dBV to +4dBuMax. Input Level +16 dBuAna

3110. WARRANTY§ 1 WARRANTY CARDTo be protected by this warranty, the buyer must complete and return the enclosed warranty card (signed/stamped by reta

32the buyer of any such circumstance. If the buyer fails to submit a written repair order within 4 weeks afternotification, BEHRINGER INTERNATIONAL wi

4The FEEDBACK DESTROYERs 2-channel Digital Feedback Destroyer / Parametric EQ powered by a 24-bit high-speed DSPs 20-bit A/D and D/A converters with 6

5FOREWORDDear Customer,Welcome to the team of FEEDBACK DESTROYER users and thank you very much for expressing yourconfidence in BEHRINGER products by

6TABLE OF CONTENT1. INTRODUCTION ...

71. INTRODUCTIONWith the FEEDBACK DESTROYER you purchased a highly useful device for the control of sound reinforce-ment systems, which will enable yo

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9The filter bandwidth can also be expressed in octaves (as on the FEEDBACK DESTROYER). The followingtable shows a list of decimal Q values vs. octaves