Page 2 - TABLE OF CONTENTS; *Trademark Notifications; Main Menu
1 TABLE OF CONTENTS INTRODUCTION 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Features 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 3 - Features
2 INTRODUCTION The Shure Model DFR11EQ is a single channel signal processor that combines a feedback reducer and graphic equalizer in a single, half-rack enclosure. The DFR11EQ isdesigned to be placed in a sound reinforcement signal path to automatically detect andcontrol acoustical feedback and equ...
Page 4 - Overview; Front Panel
3 THE DFR11EQ Overview Front Panel BYPASS Button and LED. Press this button tosuspend feedback reducer operation and removefilters from the audio path. Does not affect thegraphic equalizer. When the LED illuminates, thefeedback reducer is bypassed. SIGNAL LED. Illuminates when input signal ispresent...
Page 6 - DFR11EQ Theory; Feedback and DFR11EQ Operation; DFR11EQ Limitations
5 DFR11EQ Theory Feedback and DFR11EQ Operation When acoustical feedback occurs in a sound system, it is because the gain of the system is too high. Since no sound system (microphones, loudspeakers, room acoustics, etc.) hasan absolutely flat frequency response, feedback will occur at specific frequ...
Page 7 - Fixed and Dynamic Notch Filters; High Q vs. Low Q Filters; Filter Locking
6 Fixed and Dynamic Notch Filters The DFR11EQ can control the notch filters as either dynamic or fixed. The DFR11EQ’s 10 notch filters are factory preset as 5 fixed and 5 dynamic filters. There is no differencebetween dynamic and fixed filters until all 10 filters have been set. After all 10 notch f...
Page 8 - Setup for Feedback Control; Setup
7 Setup for Feedback Control The DFR11EQ will operate stand-alone as a feedback reducer. However, when connected to a personal computer running the supplied DFR11EQ software, additionaloptions are available. See Computer Interface for details. There are two basic ways in which to set-up the DFR11EQ:...
Page 9 - Connecting the DFR11EQ in a Sound System; Between the Mixer Main Output and the Power Amplifier; At a Subgroup Insert
8 Connecting the DFR11EQ in a Sound System The DFR11EQ should be placed where an equalizer would be in a signal path — it should be the final piece of equipment a sound signal passes through before going to a poweramplifier. Other signal processors (for example, delay or reverb effects devices) shou...
Page 11 - COMPUTER INTERFACE; Minimum Computer Requirements; Connecting the DFR11EQ to a Computer via the RS-232 (COM) Port
10 COMPUTER INTERFACE Overview This section describes the Windows based computer interface software which allows you to utilize the full features of the Shure DFR11EQ. By connecting the DFR11EQ to yourcomputer, you can access additional control features to customize the operatingcharacteristics of t...
Page 12 - Networking Multiple DFR11EQs via the Shure Link Interface; Software Installation; The Shure DFR11EQ Program Group
11 Networking Multiple DFR11EQs via the Shure Link Interface Up to 16 DFR11EQ’s can be linked together and controlled from a single computer. Each unit comes supplied with one 5-pin DIN cable for linking. Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ ÑÑ Ñ Ñ Ñ Ñ ÑÑ Ñ ÑÑ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ ...
Page 13 - Software Functions
12 Software Functions Main Menu Bar. Through the main menu bar, youcan configure the computer connection to theDFR11EQ, and access other windows forconfiguring the DFR11EQ, setting filters, and savingscenes. Feedback Reducer Panel. The Feedback ReducerPanel contains many of the same controls availab...
Page 14 - Using the Feedback Reducer Panel
13 Using the Feedback Reducer Panel Feedback Reducer (DFR) Bypass Button and LED Pressing the DFR bypass button suspends the feedback reducer operation and removes its filters from the audio path. It does not affect the graphic equalizer. When theLED illuminates, the feedback reducer is bypassed. Th...
Page 15 - Using the Graphic Equalizer; Adjusting Bands
14 Using the Graphic Equalizer Adjusting Bands The DFR11EQ graphic equalizer looks and functions just like aconventional graphic equalizer. Each slider controls a 1 / 3 -octave band centered around the frequency indicated above each slider. When a slideris selected, the center of the slider turns gr...
Page 16 - Viewing Response Curves; DFR Response Curves; EQ Response Curves; Exiting the DFR11EQ Application; To Exit
15 Viewing Response Curves DFR Response Curves Clicking on the DFR button displays the feedback filter frequency response curve on the graph. This curve shows the response of all deployed feedback filters. Here you can check the frequency and depth of each filter. EQ Response Curves Clicking on the ...
Page 17 - Accessing Connected DFR11EQs; Configuring the Computer Serial Port
16 Accessing Connected DFR11EQs Configuring the Computer Serial Port 1. Launch the DFR11EQ software. 2. Click on Setup in the main menu bar. 3. Click on the COM port option of the drop-down menu. 4. In the DFR11EQ Serial Port window, select an available COM port on the computer. 5. Click on the OK b...
Page 18 - DFR11EQ Settings; DIP Switch Override and Disable
17 DFR11EQ Settings The DFR11EQ Settings window contains options for controlling the DIP switches and setting fixed and dynamic filters. To access the DFR11EQ Settings window: 1. Click on Options in the main menu bar. 2. Select the DFR11EQ Settings... option of the drop-down menu. DIP Switch Overrid...
Page 19 - Scenes; To Store a Scene in the DFR11EQ
18 Scenes Once a DFR11EQ has been set up with a desired combination of settings, they can be stored on disk as a Scene. Although the DFR11EQ automatically saves the current scene ininternal memory, other scenes can be saved to disk. Scenes are useful for reducing setuptime when multiple units requir...
Page 20 - APPENDICES; Appendix A. Specifications
19 APPENDICES Appendix A. Specifications Frequency Response 20 to 20k Hz ± 1.0 dB re 1 kHz Dynamic Range 104 dB minimum, A-weighted, 20 Hz to 20 kHz Sampling Rate 48 kHz Digital-to-Analog, Analog-to-Digital Conversion 20 bit resolution Voltage Gain –1 dB ± 1dB (power off) 0 dB ± 2 dB (equal input an...
Page 21 - Appendix B. Rack Mounting the DFR11EQ; Single Unit
20 Appendix B. Rack Mounting the DFR11EQ The DFR11EQ comes in a 1 / 2 -rack chassis specially designed for sturdiness. The sagging and bending found in most 1 / 2 -rack designs is eliminated — the brackets and straddle bars are designed to ensure that the units will be installed securely. WARNING: D...
Page 22 - Appendix C. Connectors and Cables; Audio Connectors
21 Appendix C. Connectors and Cables NOTE: Except for the Shure Link cable, none of the cables shown come supplied with theDFR11EQ. Audio Connectors DFR11EQ Audio Input Connector: (XLR and 1/4-inch combined) XLR (female) 1/4-inch phone plug (female) Configuration: active balanced active balanced Act...
Page 24 - RCA to
23 XLR (female) to 1 / 4 -in. Balanced TYPICAL APPLICA TIONS Mixer Line Out to DFR11EQ Input DFR11EQ Output to Amplifier Input DFR11EQ Output to Mixer Sub Return Mixer Send to DFR11EQ Input Mixer Sub Send to DFR11EQ Input DFR11EQ Output to Mixer Sub Return PIN 1 PIN 2 + PIN 3 – SLEEVE TIP + RING – X...
Page 25 - Digital Connectors and Cables
24 Digital Connectors and Cables Computer Interface — 9-Pin to 9-Pin RS-232 Cable FUNCTION — RX TX DTR GND DSR RTSCTS — PIN # 123456789 9-PIN FEMALE TO COMPUTER 9-PIN MALE TO DFR11EQ DFR11EQ RS-232 CONNECTOR FEMALE COMPUTER 9-PIN RS-232 CONNECTOR MALE 5 4 3 2 1 9 8 7 6 9 8 7 6 5 4 3 2 1 9 8 7 6 9 8 ...
Page 26 - Appendix D. Warranty; Warranty
25 Appendix D. Warranty Warranty Shure Brothers Inc. (“Shure”) hereby warrants that these products will be free from defects in material and workmanship for a period of one year from the date of purchase. At itsoption, Shure will repair or replace the defective product and promptly return it to you,...
Page 27 - Notes
