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Behringer DSP1100P - page 1
1 E User´s Manual Bedienungsanleitung D Version 1.0 October 1998 FEEDBACKDESTROYER ® PRO DSP1100P www.behringer.de ...
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Behringer DSP1100P - page 2
2 acc. to the Directives 89/336/EWG and 73/23/EWG We, BEHRINGER INTERNA TIONAL GmbH Hanns-Martin-Schleyer-Straße 4 D - 47877 Willich Name and address of the manufacturer or the introducer of the product on the market who is established in the EC herewith take the sole responsibility to confirm that the product: FEEDBACKDESTROYERPRO DSP1 100P ...
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Behringer DSP1100P - page 3
3 E This symbol, wherever it appears, alerts you to the presence of uninsulated dangerous voltage inside the enclosure - voltage that may be sufficient to con- stitute a risk of shock. This symbol, wherever it appears, alerts you to important operating and mainte- nance instructions in the accompanying literature. Read the manual. SAFETY INSTRUCTIO ...
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Behringer DSP1100P - page 4
4 DSP1100P FEEDBACKDESTROYERPRO Ultra-high performance 2-channel digital Feedback Destroyer / Parametric EQ powered by a 24-bit high-speed DSP s 20-bit A/D and D/A converters with 64/128 times oversampling for ultra-high headroom and resolution s Automatically and intelligently searches out and destroys up to 12 frequencies per channel ...
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Behringer DSP1100P - page 5
5 E FOREWORD Dear Customer, Welcome to the team of FEEDBACKDESTROYERPRO users and thank you very much for expressing your confidence in BEHRINGER products by purchasing this unit. It is one of my most pleasant tasks to write this letter to you, because it is the culmination of many months of hard work delivered by our engineering team to reac ...
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Behringer DSP1100P - page 6
6 T ABLE OF CONTENT 1 . INTRODUCTION . .. . . . ............................................................................................................... 7 1. 1 The design concept .......................................................................................................... ............... 7 1. 2 Before you begin ................. ...
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Behringer DSP1100P - page 7
7 E 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 ...
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Behringer DSP1100P - page 8
8 Electrostatic charges might affect the operation of the FEEDBACKDESTROYERPRO! For further information on correct installation see chapter 5 Installation. As a standard the audio inputs and outputs on the BEHRINGER FEEDBACKDESTROYERPRO are fully balanced. If possible, connect the unit to other devices in a balanced configuration ...
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Behringer DSP1100P - page 9
9 E On start-up; all active filters (AU/SI) are indicated by flashing LEDs. When feedback has been detected and dealt with, the LED stops flashing. When all filters are set the oldest automatic filter starts flashing, indicating that it will be the next filter to handle new feedback. Parametric filters are also indicated by a non-flashing LED. In S ...
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Behringer DSP1100P - page 10
10 Fig. 1.3: Function keys and jog wheel 5 With the JOG WHEEL , a continuous rotary control, you can freely edit the selected parameters. Turn the wheel clockwise to increase the values, or counterclockwise to reduce them. + As long as none of the edit functions to the right of the jog wheel has been selected, you can use the wheel to select a prog ...
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Behringer DSP1100P - page 11
11 E + Press and keep the keys FILTERSELECT and STORE before powering up the FEEDBACK DESTROYER PRO. Then switch on the FEEDBACK DESTROYER PRO and keep the two keys pressed for about one second. The program numbers are counted up and reset to their original default settings. 16 Use the POWER switch to switch the FEEDBACKDESTROYERPRO on or ...
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Behringer DSP1100P - page 12
12 2.1 Activating/deactivating the filters In OF mode, the corresponding filter is deactivated and can be activated by selecting one of the modes described below. 2.2 Manual filters / parametric equalizer The FEEDBACK DESTROYER PRO allows you to freely process any music signals. To raise or lower specific frequencies in level, you can directl ...
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Behringer DSP1100P - page 13
13 E only after about one second, which is indicated by a dot in the lower right corner of the display. After loading the data, the FEEDBACK DESTROYER PRO enables the preset and the dot disappears. This brief interruption avoids the direct activation of every preset, as you scroll through the preset list with the jog wheel. Thus, the FEEDBACK DESTR ...
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Behringer DSP1100P - page 14
14 2.4.4 Storing programs Use the STORE key to store the program. Basically, all parameter changes in Parametric EQ mode can be saved. Filters working in Single-Shot or Auto mode will adjust and store the required parameters automatically. Example: s You recall a program for editing. Then you edit the preset as desired using the function keys and t ...
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Behringer DSP1100P - page 15
15 E via MIDI. Accordingly, the value 1 enables MIDI controller #18 so that you can modify or replace presets with a remote MIDI device or a sequencer. In this case the actual settings will be stored directly to the location that corresponds to the controller value. + Attention! Since the store enable mode allows you to access memory lo ...
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Behringer DSP1100P - page 16
16 3.1 Level setting Take care to set levels properly on the FEEDBACKDESTROYERPRO! Low levels deteriorate the dynamics of the music signal, which results in a poor, weak and noisy sound. On the other hand, excess levels overdriving the converters in the FEEDBACKDESTROYERPRO should also be avoided. Digital distortion is (unlike its analo ...
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Behringer DSP1100P - page 17
17 E situations. Before applying the FEEDBACK DESTROYER PRO, it is therefore advisable to remove the condition causing the feedback problems. For example, try different microphone positions! Use the FEEDBACKDESTROYERPRO in the monitor path and in single channels with critical signals. If there is no other way to eliminate feedback, you can in ...
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Behringer DSP1100P - page 18
18 3.4 Using the FEEDBACK DESTROYER PRO in single channels and sub-groups Master Out P .A. System Sub-Group Insert Channel Insert Fig. 3.3: Inserting the FEEDBACK DESTROYER PRO in single channels and sub-groups If you want to make sure that deliberately produced feedback signals, such as guitar feedback, are not eliminated, you should try ins ...
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Behringer DSP1100P - page 19
19 E 3.7 Special remarks 3.7 .1 Digital overflow When using the FEEDBACK DESTROYER PRO as a parametric equalizer (Parametric EQ mode) and applying extreme attenuation values in the low end range of the frequency spectrum (below 50Hz), you should perhaps set several filters to process the same frequency. Depending on the amount of attenuation app ...
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Behringer DSP1100P - page 20
20 The range of sound pressure levels or the dynamic range of human hearing encompasses a factor of 10,000,000. This enormous range of values is difficult to handle and additionally does not represent the subjective perception of sound, since human hearing tends to use a logarithmic curve. When an increase in loudness by the factor two is perceived ...
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Behringer DSP1100P - page 21
21 E 0 dB -2 dB -4 dB -6 dB -8 dB -10 dB -12 dB 1 kHz 5 kHz 200 Hz Bandwidth = 600 Hz Filter attenuated by 8 dB at 1kHz Center frequency = 1 kHz -3 dB Fig. 4.2: T ypical equalizer filter curve The filter bandwidth can also be expressed in octaves (as on the FEEDBACK DESTROYER PRO). The following table shows a list of decimal Q values vs. octaves: O ...
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Behringer DSP1100P - page 22
22 Microphone Mixing Console Power Amp Speaker Box Fig. 4.3: T ypical feedback loop Basically, any microphone signal passing through an amplifier is liable to generate feedback. Unfortunately, the feedback frequencies of P.A. systems differ, and even one single system can have varying feedback frequencies, as these depend largely on the room acoust ...
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Behringer DSP1100P - page 23
23 E Of course, you can use the FINE button to fine tune to frequencies between the standard ISO frequencies (in 1/60-octave steps) within a range of 1/3 octave. Hz 20 25 31, 5 40 50 63 80 100 125 160 2 00 250 315 400 500 630 800 kHz 1 1, 25 1, 6 2 2, 5 3, 15 4 5 6, 3 8 10 12, 5 16 20 T ab. 4.2: standard ISO frequencies 4. 3 Parametric equalizers P ...
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Behringer DSP1100P - page 24
24 s Quick filter settings can be realized by using standard ISO values for the allocation of frequency bands. Subsequently, you can fine tune the frequency of your choice. 4. 5 Digital audio processing In order to convert an analog signal - e.g. music - into a series of digital words, a so-called Analogue to Digital Converter or ADC is used. ...
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Behringer DSP1100P - page 25
25 E Quantization Steps U (V oltage) -8 -7 -6 -5 -4 -3 -2 Digital Words 1111 111 0 1 101 1 100 101 1 1010 1001 1000 0000 t (Time) 0001 0010 001 1 0100 0101 01 10 01 11 Conversation Rate 8 7 6 5 4 3 1 2 3 4 5 6 7 8 -1 -2 -3 -4 -5 -6 -7 -8 Quantization Errors (Noise) Continuous Analog Signal Fig. 4.4: T ransfer diagram for an ideal linear ADC (2 s ...
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Behringer DSP1100P - page 26
26 does not comply, then it is necessary to switch the operating voltage to the correct supply requirements BEFORE turning on the unit, otherwise the unit could be severely damaged. You will find this combined fuse holder/voltage selector at the back, adjacent to the IEC receptacle. IMPORTANT: This does not apply for general export models which are ...
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Behringer DSP1100P - page 27
27 E Unbalanced use of mono 1/4" jack plugs Ring Balanced use of stereo 1/4" jack plugs Balanced use with XLR connectors 1 2 3 2 1 3 Input Output Tip = Signal Tip = hot (+ve) Sleeve = Ground / Shield Sleeve = Ground / Shield Tip Ti p Sleeve Sleeve Strain relief clamp Strain relief clamp Ring = cold (-ve) For connection of balanced and unb ...
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Behringer DSP1100P - page 28
28 5.5 Operating level Switch To adapt the FEEDBACK DESTROYER PRO to the used operating level, the unit can be switched between homerecording level (-10dBV) and professional level (+4dBu). Use the LED bars on the frontpanel to deter- mine the optimal setting. The Level indicators should read somewhere between -10 and -6dB, while the clip L ...
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Behringer DSP1100P - page 29
29 E 6. 2 Preset table Preset Filter 1 Filte r 2 Filter 3 Filter 4 Filter 5 Filte r 6 Filter 7 Filter 8 Filter 9 Filte r 10 Filte r 11 Filte r 12 1 L SI SI SI SI SI SI SI SI SI AU AU AU R SI SI SI SI SI SI SI SI SI AU AU AU 2 L SI SI SI SI SI SI SI AU AU AU AU AU R SI SI SI SI SI SI SI AU AU AU AU AU 3 L AU AU AU AU AU AU AU AU AU AU AU AU R AU AU ...
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Behringer DSP1100P - page 30
30 6.3 MIDI implementation Parameter Nam e Display Range Midi Control Number Control Value Rang e LEDs Couple Left Right IN on IN off IN flashing Filter Select 1..12 10 0..11 Filter Mode OF, PA, A U, SI 11 0..3 Engine 12 0,1,2 0 1 2 Frequency 20 (Hz)..20 (kHz) 13 0..30 Fine (1/60 Oct) -9..+10 14 0..19 Bandwidth 1..120 15 0..119 Gain -48..+16 16 0.. ...
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Behringer DSP1100P - page 31
31 E 6. 4 Specifications Analog Inputs Connectors XLR and 1/4" jack Type R F filtered, servo balanced input Impedance 6 0 k O h m s balanced, 30 kOhms unbalanced Nominal Operating Level - 10dBV to +4dBu Max. Input Level +16 dBu at +4 dB nominal level, +2 dBV at -10 dBV nominal level Analog Outputs Connectors XLR and 1/4" jack Type E l ec ...
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Behringer DSP1100P - page 32
32 this modification/adaptation shall not be considered a defect in materials or workmanship. The warranty does not cover any such modification/adaptation, irrespective of whether it was carried out properly or not. Under the terms of this warranty, BEHRINGER INTERNATIONAL shall not be held responsible for any cost resulting from such a modificatio ...
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