JBL 260 user manual Feedback Eliminator

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Section 4

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Detailed Parameters

 

 

 

 

 

Band 9 Frequency 20 to 20k (High Shelf)

Selects the frequency of the high shelf parametric EQ.

Slope 9 3-12dB/Octave

Sets the slope of the high shelf parametric EQ.

Level 9 -12 to 12 dB

Sets the overall gain of the high shelf parametric

4.2 Feedback Eliminator

The DriveRack 260 offers the exclusive patent pending AFS (Advanced Feedback Suppression) feedback elimination module. Feedback is caused when a microphonic signal such as a guitar pickup or microphone is reproduced with amplification and is repeatedly picked up in phase. The AFS uses Precision Frequency Detection and state-of-the-art processing to determine the exact portions of a given frequency of your feedback that need to be removed (instead of taking out large sections of your sound). The AFS module of the DriveRack 260 allows the user to optimize the elimination of feedback. In the past, graphic equalizers were used to eliminate feedback from a system. This was an acceptable method for eliminating feedback, but when this method was precision tested, the result clearly showed that a single 1/3 octave EQ slider was removing approximately half of the signal power. With AFS, the module removes the feedback automatically and the proprietary, precision AFS filters remove only a fraction of the frequency spectrum. The following diagram shows AFS as opposed to competing, competitive feedback eliminators and conventional graphic EQs:

AFS On/Off

Turns the AFS module on and off. If AFS is Off, the filters are bypassed, and the algorithm is halted (the filters are not updated). If AFS is On, the filters are active, and the they are updated according to the current selected mode (Fixed or Live).

Clear Live/All

This parameter clears the filters. If Clear Live is selected, then (if invoked) the live filters are reset. If Clear All is selected, then (if invoked) all of the filters are reset. When either Clear Live or Clear All is selected, the third parameter row displays “Clear w/ Data Wheel.” If the Clear field is blank, then nothing is displayed on this row. To clear filters move the cursor down to the ‘Clear w/ Data Wheel’ row, then turn the Data Wheel. ‘Clearing Filters...’ will appear in the display.

Mode - Live or Fixed

When the mode is set to Fixed, the algorithm updates only the fixed filters. When the mode is set to Live, the algorithm updates only the live filters. In FIXED mode, the system is forced into feedback by the user and filters are automatically assigned to a frequency which is

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Contents DriveRack Important Safety Information Electromagnetic Compatibility DriveRack Table of ContentsIntro Introduction DriveRack 260 FeaturesDefining the DriveRack 260 System DriveRackIntroduction Service Contact InfoIntroductionDriveRack Warranty Section Getting Started Rear Panel Connections Getting Started Front Panel Connections Getting Started Quick StartGetting Started Section DriveRack DriveRack DriveRack DriveRack DriveRack DriveRack Functions Effect Button Array Overview Editing Functions Basic Navigation ModesNavigating the Crossover Section Editing Functions Navigating the Pre-EQ -GEQ and PEQNavigating the Dynamics Section Editing Functions Navigating the Other SectionNavigating the Utility/Meters Section Editing Functions Navigating the Delay SectionNavigating the I/O Section Editing Functions Navigating the Wizard SectionFunctions Program Definition Configuration FunctionsNavigating Factory Programs Selecting ProgramsNavigation Modes Editing Factory ProgramsStore Program Replacing Configuration Functions Saving Factory Program ChangesSignal Path Configuration Functions Creating a User ConfigurationSelect Link/UnlinkSelect Route CompMono DLY 20 MS 810 ms Unused Select Link/Unlink Select Link/UnlinkRoute Name Output Ch2 Saving Configuration ChangesDetailed Pre-Crossover EQ 28 Band Graphic or 9-Band Parametric Detailed ParametersFeedback Eliminator Subharmonic Synthesizer Gate Detailed Parameters Automatic Gain Control AGC Crossover Detailed Parameters Notch FiltersPost-CROSSOVER PEQ Compressor/Limiter Ratio R 1.0 to Inf1 Threshold T -40 to +20dBuGain G -20 to +20 dB Auto On/OffAttack .01 to 200 m Sec per band or global Limiter On/OffHold 0 to 500 m Sec per band or global Release 360 to 5 dB / Sec per band or globalInput Routing Alignment DelayOutput Meters Utilities/Meters Utility LCD Contrast Auto EQ PlotLCD Contrast / Auto EQ Plot PUP Program/MuteZC Setup Panel Power Up Modes PUP Program Stored PUP Mute CurrentZC Setup Cut Panel ZC-2 BoostOutput Panel 1 ZC-3 Select a No ChangeSet Security Level Pre EQ Low Panel ZC-4 Switch 1 2 3 No ChangeSecurity Press Store to Change Password Edit High Password Edit Med PasswordSet 260 Device Level High Password Enter PasswordProgram List/Program Change Program List Prog Change Mode Program List Prog LockLIM 0+ INS a Comp o+Zone Controllers Panel Output Trims NetPage Control DriveWare PC Software GUI Remote ControlSection Basic Operation DriveRack Zone Controller Installation Remote Control ZC-Zone ControllersZC-1 & ZC-2 Zone Controller Wiring Section Diagram a Diagram B Diagram C Guide Mono 4-Way w/ Two Aux Zones Application GuideHardware SoftwareApplication Guide Stereo Tri-amp Application Guide Stereo w/ four Aux Zones Application Guide Stereo Bi-amp w/ Dual Delay Page DriveRackAppendix Power Up Quick Key Options Appendix Factory ResetAnalog Inputs Appendix SpecificationsAppendix Auto EQ Optimization Tips Adjust Crossover Output Gains gain structureLook out for Modes Appendix Crossover Diagrams Main Speakers Power Amplifiers Appendix Program List/ Speaker Tunings/ Power Amp TuningsProgram List DriveRackAppendix a Appendix Block DiagramAppendix Input and Output Diagrams Appendix Gain Level Jumpers System Setup and Gain StructureAppendix

260 specifications

The JBL 260 is a powerful and versatile loudspeaker that embodies the brand's renowned commitment to audio excellence. Known for its striking design and rich sound quality, the JBL 260 caters to both audiophiles and casual listeners alike, ensuring an immersive listening experience in any environment.

One of the standout features of the JBL 260 is its high-efficiency design, which allows it to deliver exceptional sound performance even in larger spaces. The speaker is equipped with a robust 6.5-inch woofer that provides deep, resonant bass, while a 1-inch soft dome tweeter ensures clear and detailed high frequencies. This combination results in a balanced sound signature that captures the subtle nuances of various music genres.

The JBL 260 employs advanced technologies such as Harman's proprietary Polished Surface Com Acoustic Design, which minimizes cabinet vibrations and resonances. This technology contributes to the overall clarity of the audio output, allowing for a more natural soundstage. Additionally, the Waveguide technology used in the speaker enhances the dispersion of sound throughout the room, ensuring that listeners can enjoy a consistent audio quality, regardless of their position.

Connectivity is another area where the JBL 260 excels. The speaker includes versatile connection options, such as Bluetooth, allowing users to stream music wirelessly from smartphones, tablets, or computers. This makes it incredibly easy to integrate the JBL 260 into modern home entertainment systems. With a range of inputs, including RCA and auxiliary ports, the speaker can accommodate various audio sources, making it a great choice for both casual listening and serious audio setups.

The design of the JBL 260 is both sleek and functional, with a modern aesthetic that fits seamlessly into any décor. Its sturdy construction not only contributes to its durability but also enhances sound quality by minimizing unwanted distortions. The speaker is available in various finishes, allowing users to choose a model that best suits their personal style.

In summary, the JBL 260 is a feature-rich loudspeaker that brings together advanced sound technologies, versatile connectivity options, and an attractive design. It stands out as an ideal choice for anyone seeking to elevate their audio experience, making it a solid investment for years to come.
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