User manual SABINE FBX-2020

[. . . ] OPERA TING GUIDE V2 QUICK-START OPERATION DECLARATION OF CONFORMITY 1 2 FBX-2020 CONTROLS 4 APPLICATION OF COUNCIL DIRECTIVE 2 ABOUT THE FBX-2020 3 FIFTH OCTAVE FILTER STAGE ACTIVITY POWER SWITCH FUSE APPLICATION DIAGRAMS 4 4 4 4 5 FREQUENCY RESPONSE WORLD'S BEST FEEDBACK CONTROLLER WHO NEEDS FBX?ACTIVE/BYPASS SWITCH SIGNAL LEVEL RESET SET TOTAL NUMBER OF FILTERS SET FIXED LOCK FIXED FILTERS A/C POWER INPUT AUDIO INPUTS & OUTPUTS 3 3 3 3 3 4 4 4 4 4 4 4 4 FBX SETUP FOR MONITORS FBX SETUP FOR ENTIRE MIX FBX SETUP FOR SINGLE INSERT POINT FBX SETUP FOR INSERT SEND & RETURN FBX-2020 OPERATING INSTRUCTIONS 5 5 6 6 6 6 6 CLIPGUARDTM TURBO MODE GUIDE HOW TO OPERATE THE FBX-2020 HOW TO USE THE FBX-2020 FEATURES USING THE LOCK FIXED FEATURE SELECTING FILTER WIDTH IMPORTANT OPERATING CONSIDERATIONS MEMORY BYPASS MODE RESETTING THE FILTERS TURBO MODE SETUP DEFEATING TURBO MODE MOBILE VS. STATIONARY MICROPHONES FREQUENTLY ASKED QUESTIONS INDEX CAUTIONS & WARNINGS LIMITED WARRANTY 6 7 8 8 8 8 8 8 8 8 8 8 9 9 11 12 WHERE THE FBX FITS IN YOUR SOUND SYSTEM A NOTE ABOUT GRAPHIC EQUALIZERS UNDERSTANDING FIXED & DYNAMIC FILTERS CLIPGUARDTM ADAPTIVE CLIP LEVEL CONTROL 6 6 6 6 FBX-2020 ENGINEERING SPECIFICATIONS 10 QUICK-START OPERATION For best results, read all operating instructions before using the FBX-2020. If you're already familiar with the FBX or just want a basic overview of FBX operation, this simple quick-start procedure is for you. [. . . ] WARNING: TURBO Mode will cause distortion in your audio program -- it is for setup only. You must follow the setup procedure outlined in the previous section, and do not play program during TURBO setup mode. Otherwise the 2020 will clip, and filters may be set improperly. (Clip level is set to the lowest level so the feedback clips quickly; therefore, your program will also be clipped in TURBO mode. Be sure a dynamic filter is set, and if one isn't, press the LOCK FIXED button before your program begins. ) You'll know the 2020 is in TURBO mode if the red CLIP LED flashes when no other signal level LEDs are lit. Defeating Turbo Mode You can manually override TURBO mode if necessary: Press LOCK FIXED (the LOCK FIXED light will turn on), then press it again. (LOCK FIXED light will go out). Important Operating Considerations Memory The FBX stores the positions and depths of the filters in nonvolatile internal memory when the unit is turned off or during a power failure. The unit will return all filters to their previous frequencies and depths when it is turned back on. Mobile vs. Stationary Microphones One significant advantage offered by the Sabine family of FBX feedback eliminator products is their ability to adapt to changing acoustical relationships involving sound system components and various user applications. One major source of potential feedback problems arises in situations with wireless microphones, when the user of the wireless mic is moving around the stage/auditorium. As a microphone moves in a sound space, with varying degrees of proximity to the speakers and varying acoustic responses, feedback frequencies may shift. In such a situation, feedback-free mobility may be more important a concern than maximum system gain. One method of setting FBX filters with mobile microphones is to turn a microphone on and walk around to the various possible microphone locations. At the same time, raise the system gain and set the FBX filters one at a time. In some situations, raising the number of dynamic filters (versus fixed FBX filters) may allow a second layer of defense against new feedback from new locations. However, in many mobile microphone set ups, fixed FBX filters will protect against feedback across the range of microphone mobility. Bypass Mode The FBX has a true power-off bypass. The signal is unaffected in BYPASS MODE even if the unit is turned off. Please note that if a combination of BALANCED and UNBALANCED inputs and outputs is used, the signal may be disconnected in BYPASS MODE. Resetting the filters The user must reset the FBX if the microphones or speakers are moved significantly. To reset the unit, place the PA system's master volume to minimum and then press the RESET button until the LEDs flash about 4 seconds -- and the FILTER LEDs stop flashing. Then follow the system initialization procedure explained previously. TURBO Mode Setup The FBX-2020 incorporates TURBO mode setup, which is indicated by a flashing red "CLIP" LED. This lightning-quick 8 FREQUENTLY ASKED QUESTIONS Q. Can I place the FBX in the mixer's EQ loop?Can I place the unit in the mixer effects loop? [. . . ] If the DEALER is unable to provide the necessary warranty service, you will be directed to the nearest other SABINE AUTHORIZED DEALER which can provide such service. Ship the defective item, prepaid, to: SABINE, INC. 13301 HIGHWAY 441 ALACHUA, FL 32615-8544 Include therewith a complete, detailed description of the problem, together with a legible copy of the original PROOF OF PURCHASE and a complete return address. Upon Sabine's receipt of these items: If the defect is remedial under the limited warranties and the other terms and conditions expressed have been complied with, Sabine will provide the necessary warranty service to repair or replace the product and will return it, FREIGHT COLLECT, to you, the purchaser. [. . . ]