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Table of Contents
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Summary of Contents for dbx AFS 224
- Page 1 ® ™ ual Channel Advanced Feedback Suppression Processor User Manual...
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Page 2: Important Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS WARNING FOR YOUR PROTECTION C A U T I O N READ THESE INSTRUCTIONS: R I S K O F E L E C T R I C S H O C K D O N O T O P E N KEEP THESE INSTRUCTIONS A T T E N T I O N : R I S Q U E D E C H O C E L E C T R I Q U E - N E P A S O U V R I R... -
Page 3: Electromagnetic Compatibility
Directive 93/68/EEC. Vice-President of Engineering 8760 S. Sandy Parkway Sandy, Utah 84070, USA Date: June 9, 2003 European Contact: Your local dbx Sales and Service Office or Harman Music Group 8760 South Sandy Parkway Sandy, Utah 84070 USA Ph: (801) 566-8800... -
Page 4: Table Of Contents
AFS 224 Table of Contents Table of Contents Defining the AFS 224 ..........i Service Contact Info ..........ii Warranty ..............ii Installation Recommendations.......1 Basic Connections ..........1 Rear Panel Connections .........2 Front Panel Connections........2 User Setup...............3 Applications ............7 Block Diagram ............10 Specifications ............11 ®... - Page 5 AFS 224 AFS 224 Operation ®...
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Page 6: Defining The Afs 224
• XLR and TRS Electronically Balanced Input and Outputs The AFS 224 Advantage Key features that make the AFS 224 are its Fixed and Live modes of operation, as well as the units Filter Lift capabilities. The Live Mode of operation continuously updates filter placement which provides flexibility during a performance. -
Page 7: Service Contact Info
After expiration of the warranty, a reasonable charge will be made for parts, labor, and packing if you choose to use the factory service facility. In all cases, you are responsible for transportation charges to the factory. dbx will pay return shipping if the unit is still under war- ranty. -
Page 8: Installation Recommendations
In no event shall dbx or its dealers be liable for special or con- sequential damages or from any delay in the performance of this warranty due to causes beyond their control. -
Page 9: Rear Panel Connections
SPEECH type uses much wider notch filters allow- ing the AFS 224 to work faster. The Type, LED color and Frequency Q are listed below and a representative filter Q graph is shown on the next page. -
Page 10: User Setup
AFS 224 since the insert points on most mixers are pre output fader. This allows the proper signal level to be fed to the AFS 224 without the chan- nel or output fader affecting the level as the fader is moved up or down. Be sure to check the mixer’s manual for the nominal operating point for the insert jacks, and then select the +4dBu... - Page 11 B – Setup Mode The AFS 224 setup mode is used to set the Total Number of Filters and the Number of Fixed Filters in each channel. The number of Live filters is the difference between the Total Number of Filters and the Number of Fixed filters (Live filters = Total Filters-Fixed filters).
- Page 12 Live Mode allows feedback filters to be set and removed based on changes in the environment and is designed to be used during a performance. The AFS 224 can be put into Live Mode by pressing the <MODE> button until it lights red. Once in Live Mode, if feedback occurs a fil- ter will be set at the feedback frequency.
- Page 13 F- 1 Front Panel Lockout To lockout all access to the front panel of the AFS 224, press and hold the channel 1 <LIVE FILTER LIFT> button until all of the filter LEDs light from outside to inside. To unlock the front panel lockout, press and hold the channel 1 <LIVE FILTER LIFT>...
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Page 14: Applications
This application provides the user with individual channels of 24 filter of feed- back suppression per microphone. Connect the channel insert output from the mixer to the input of the AFS 224. 2. Connect the output of the AFS 224 to the insert return of the mixer. - Page 15 This application provides the user with dual channels of 24 filters of feedback suppres- sion per channel. Connect the stereo output inserts of the mixer to the inputs of the AFS 224. 2. Connect the outputs of the AFS 224 to the insert returns of the console.
- Page 16 This application provides the user with dual channels of 24 filter suppression per stereo channel of the mixing console subgroup. Connect the stereo output inserts of the mixer to the inputs of the AFS 224. 2. Connect the outputs of the AFS 224 to the insert returns of the console.
- Page 17 2. Connect the outputs of the AFS 224 to the power amps. 3. Apply power to the mixer and amplifiers. For maximum performance and proper operation, the input signal to the dbx 224 must cause the “0” dBu LED to light fairly consistently and the “+10” dBu LED to light occasionally.
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Page 18: Block Diagram
AFS 224 Operation Block Diagram Block diagram ® 386 User Manual AFS 224 User Manual... -
Page 19: Specifications
Balanced >120Ω, unbalanced >60Ω Max Output Level: +20dBu A/D Performance: Type: dbx Type IV™ conversion system Dynamic Range: >113 dB A-weighted, >110 dB unweighted, 22kHz BW Type IV™ dynamic range: >119 dB, A-weighted, 22kHz BW >117 dB, unweighted, 22kHz BW... - Page 20 ® A Harman International Company 8760 South Sandy Pkwy. Sandy, Utah 84070 Phone: (801) 568-7660 Fax: (801) 568-7662 Questions or comments E•mail us at: customer@dbxpro.com or visit our World Wide Web home page at: www.dbxpro.com 18-6398-A...