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FEEDBACK DESTROYER PRO DSP1124P

FOREWORD

Dear Customer,
Welcome to the team of FEEDBACK DESTROYER PRO users and thank you very much for expressing your

confidence in BEHRINGER products by purchasing the DSP1124P. 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 reach a very ambitious goal: making an outstanding and extremely flexible device for studios and P.A.

rental companies better still.
The task to design our new FEEDBACK DESTROYER PRO certainly meant a great deal of responsibility,

which we assumed by focusing on you, the discerning user and musician. It also meant a lot of work and night

shifts to accomplish this goal. But it was fun, too. Developing a product usually brings a lot of people together,

and what a great feeling it is when everybody who participated in such a project can be proud of what we’ve

achieved.
It is our philosophy to share our joy with you, because you are the most important member of the BEHRINGER

family. With your highly competent suggestions for new products you’ve greatly contributed to shaping our

company and making it successful. In return, we guarantee you uncompromising quality (manufactured under

ISO9000 certified management system) as well as excellent technical and audio properties at an extremely

favorable price. All of this will enable you to fully unfold your creativity without being hampered by budget

constraints.
We are often asked how we can make it to produce such high-grade devices at such unbelievably low prices.

The answer is quite simple: it’s you, our customers! Many satisfied customers means large sales volumes

enabling us to get better conditions of purchase for components, etc. Isn’t it only fair to pass this benefit back

to you? Because we know that your success is our success, too!
I would like to thank all people whose help on “Project FEEDBACK DESTROYER PRO” has made it all

possible. Everybody has made very personal contributions, starting from the designers of the unit via the many

staff members in our company to you, the user of BEHRINGER products.

My friends, it’s been worth the trouble!

Thank you very much,

Uli Behringer

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Summary of Contents for FEEDBACK DESTROYER PRO DSP1124P

Page 1: ...User s Manual Version 1 0 February 2001 www behringer com FEEDBACK DESTROYER PRO DSP1124P ENGLISH Downloaded from www g7syw com www g7syw com...

Page 2: ...hrough the ventilation openings Heat The appliance should be situated away from heat sources such as radiators heat registers stoves or other appliance including amplifiers that produce heat Power Sou...

Page 3: ...ber of the BEHRINGER family With your highly competent suggestions for new products you ve greatly contributed to shaping our company and making it successful In return we guarantee you uncompromising...

Page 4: ...ode allows for setting up to 2 x 12 fully parametric filters including frequency bandwidth and gain s Single Shot Auto and Manual modes are assignable for each filter s Free FEEDBACK DESTROYER design...

Page 5: ...CTURE PRESETS FILTERS OPERATING MODES 13 5 1 Priming the DSP1124P for P A and monitor applications 13 6 OPERATING MODES OF THE DSP1124P 14 6 1 Off mode OF 14 6 2 Manual filters PA parametric equalizer...

Page 6: ...itches and further selected components The FEEDBACK DESTROYER PRO employs SMD technology Surface Mounted Device These subminiature components known from aerospace technology allow for an extreme packi...

Page 7: ...o produce feedback the first section is the so called front of house mix FOH i e the public address mix which is reproduced by one or several amplifiers plus several loudspeakers directed at the audie...

Page 8: ...d a so called splitter to route the single microphone signals both to the FOH console and to the monitor mixer When using the FOH console for the monitor mix the stage microphones are connected direct...

Page 9: ...pre compressor in this way the signal is taken at the insert jack passes the DSP1124P then the compressor and is finally routed back to the insert jack Ideally your mixer has sub groups with dedicate...

Page 10: ...nitor paths is being used this procedure must be done separately for each path Repeat for each susceptible mic channel s Using the DSP1124P on channel sub group inserts Deliberately induce feedback by...

Page 11: ...mode SI and Auto mode AU Please read chapter 6 OPERATING MODES OF THE DSP1124P Pressing the FILTER MODE and GAIN keys simultaneously allows you to adjust the sensitivity of the feedback suppression t...

Page 12: ...elements 17 Use the OPERATING LEVEL switch to change from home recording level 10 dBV to studio level 4 dBu and vice versa The level meters are adapted automatically to the selected nominal level so...

Page 13: ...0 be unlocked so as to be able to detect new feedback frequencies Basically all active filters both in AU or SI mode are represented by flashing LEDs in the STATUS INDICATOR When feedback has been det...

Page 14: ...plications Example During a pure speech transmission the feedback sensitivity can be lowered to 9 dB In this way the algorithm would recognize and suppress feedback even faster On the other hand a hig...

Page 15: ...each preset as you scroll through the preset list with the JOG WHEEL Thus the DSP1124P makes sure that no unwanted programs are loaded unintentionally Additionally you can rotate the JOG WHEEL at hig...

Page 16: ...cal proportion between the displayed value and the absolute frequency as well as a guide to find the desired frequency quickly are listed in the appendix chapter 11 1 frequency chart The bandwidth of...

Page 17: ...small c channel The JOG WHEEL adjusts a channel from 1 through 16 To switch off the MIDI function simply select 0 displayed as On the second page you can select MIDI Omni mode i e the unit transmits r...

Page 18: ...ou press the IN OUT key again on the sixth page the FEEDBACK DESTROYER PRO quits MIDI mode You can also use any other key to leave the MIDI setup menu The full featured MIDI implementation of the FEED...

Page 19: ...ease ensure that only qualified persons install and operate the FEEDBACK DESTROYER PRO During installation and operation the user must have sufficient electrical contact to earth Electrostatic charges...

Page 20: ...192 196 200 205 210 215 220 225 20 kHz 25 kHz 228 230 235 240 245 250 257 263 270 276 283 25 kHz 32 kHz 286 289 296 302 309 315 324 332 341 349 358 32 kHz 40 kHz 362 366 375 383 392 400 410 420 430 44...

Page 21: ...I SI SI SI SI SI PA def PA def PA def PA def 8 Couple PA PA PA d PA d SI SI SI SI SI SI SI SI 40 Hz 80 Hz 1 Oct 1 Oct 8 dB 4 dB 9 L R SI SI SI SI SI SI SI AU AU PA PA PA SI SI SI SI SI SI SI AU AU PA...

Page 22: ...Time Clock Commands X X X X Aux Messages Local ON OFF All notes OFF Active Sense Reset X X X X X X X X Notes O YES X NO Mode 1 OMNI ON POLY Mode 2 OMNI ON MONO Mode 3 OMNI OFF POLY Mode 4 OMNI OFF MO...

Page 23: ...et IN OUT THRU DIGITAL PROCESSING Converters 24 bit Sigma Delta 64 128 times Oversampling Sampling Rate 46 875 kHz DISPLAY Type 2 digit numeric LED Display POWER SUPPLY Mains Voltages USA Canada 120 V...

Page 24: ...eipt of the product at BEHRINGER 2 If the product needs to be modified or adapted in order to comply with applicable technical or safety standards on a na tional or local level in any country which is...

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