dbx Pro 260 user manual Notch Filters, Crossover, Post-CROSSOVER PEQ

Page 41


DriveRack™	Detailed Parameters		Section 4

		4.6 Notch Filters

The notch filter is the perfect tool for dropping out undesirable frequencies that may appear in the input signal. Up to six Notch filters are available for all six outputs.

Notch On/Off

Turns the notch filters on and off.

Frequency (1 to 6) 20 to 20K

Selects the desired notch filter frequency of the selected notch filter.

Gain -36 to 6 dB

Sets the level of the selected notch filter. Set to +6dB to help find unwanted feedback, then set to -3dB to -36dB to remove.

Q 16 to 128

Selects the Q of the selected notch filter.

4.7 Crossover

The Crossover is used to divide the input signal into several frequency bands. This allows the user to drive the speaker in its optimum frequency range and send each output separately for more efficient use of amplifier power. The 260 DriveRack Crossover can be configured as a 2x3, 4, 5, or 6. Appendix A.5 illustrates each of the available crossovers. The High-Pass or Low-Pass filter being edited is indicated by the highlighted edge in the graphics area.

Frequency

Adjusts the frequency of the Low Pass filter from 20 to 20KHz.

Type

Selects the filter type. Selections are: BS 6, 12, 18, 24 Bessel type filter, BW 6,12,18,24 for Butterworth type filter with slope of 6, 12, 18 or 24 dB/Octave and LR12, 24 for Linkwitz- Riley type with slope of 12 or 24 dB/Octave.

Gain

Sets the level of the selected crossover band. Range is from Infinity to +20dB.

4.8 Post-CROSSOVER PEQ

In addition to the pre-crossover EQ options within the signal path, the 260 DriveRack also offers a 2 or 3-band parametric EQ after the crossover section. The parameters for the post-crossover EQ are as follows and are user adjustable.

PEQ On/Off

Turns the PEQ band on and off.

The following figure shows the constant Q parametric filter.

®

DriveRack™ User Manual	33

Image 41

Contents 260 Important Safety Instructions Electromagnetic Compatibility DriveRack Table of ContentsIntro Defining the 260 DriveRack System DriveRack featuresIntroductionDriveRack DriveRackIntroduction Service Contact InfoIntroductionDriveRack Warranty Section Front Panel Getting StartedRear Panel Connections Data Wheel LCD DisplayFunction Buttons Input MetersOutput Meters Quick StartDriveRack Stereo System SetupSub Speaker AFS Wizard Auto EQ WizardAFS Select total number of AFS filters Slowly Increase Mixer gain to Desired level DriveRack Section Effect Button Array Overview Editing FunctionsBasic Navigation Modes Navigating the Xover Section Navigating the EQ -GEQ and PEQNavigating the Dynamics Section Navigating the Other SectionNavigating the Utility/Meters Section Navigating the Delay SectionNavigating the I/O Section Navigating the Wizard SectionFunctions Program Definition Configuring the DriveRackNavigating Factory Programs Selecting ProgramsNavigation Modes Editing Factory ProgramsSaving Factory Programs Changes Store Program ReplacingSignal Path Creating a User ConfigurationSelect Link/UnlinkSelect Route Select Link/UnlinkMono DLY 1.3 10 ms Unused Select Link/Unlink Route Name Output Ch2 Mono DLY 20 MS 810 ms Unused Select Link/UnlinkName Rock Venue Saving Configuration ChangesDetailed Pre-Crossover EQ Detailed ParametersFeedback Eliminator Subharmonic Synthesizer Gate Automatic Gain Control AGC Post-CROSSOVER PEQ Notch FiltersCrossover Compressor/Limiter Ratio R 1.0 to Inf1 Threshold T -40 to +20dBuGain G -20 to +20 dB Auto On/OffHold 0 to 500 m Sec per band or global Attack .01 to 200 m Sec per band or globalRelease 360 to 5 dB / Sec per band or global Peakstop+ On/OffInput Routing Alignment DelayOutput Phase 0 toNoise Level -10 to 10 Mixer and Router Shift On/OffMeters Utility LCD Contrast Auto EQ Plot Power Up Modes PUP Program Stored PUP Mute CurrentUtilities/Meters 1 LCD Contrast / Auto EQ Plot3 ZC Setup ZC Setup Panel NonePanel ZC-2 Boost 0dB Cut Output Panel 1 ZC-4 Switch 1 2 3 No ChangePanel 1 ZC-3 Select a No Change 4 -6 SecuritySet 260 Device Level High Set Security Level Pre EQ LowPassword Enter Password Password Edit High Password Edit Med Password7-8 Program List/Program Change Prog Change Mode Program List Prog LockProgram List List Size List Index 8 Output Jumper Switches Output Jumpers SettingLIM 0+ Insa Comp o+Zone Controllers Panel MetersOutput Trims Net Remote Control PC GUI Installation Remote ControlSection GUI Recommended Cable Specifications ZC-Zone Controllers DriveRack Diagram a Diagram B Zone Controller WiringDriveRack DriveWare Functions Page Guide Mono Four-Way w/ Two Aux Zones Application GuideHardware SoftwareStereo Tri-amp DriveRackStereo with Four Aux Zones DriveRack Stereo Bi-amp w/ Dual DelayDriveRack DriveRackAppendix Power Up Quick Key Options Factory ResetAppendix a SpecificationsLook out for Modes Auto EQ Optimization TipsCrossover Diagrams Program List/ Speaker Tunings/ Power Amp Tunings Block Diagram Input and Output Diagrams Gain Level Jumpers System Setup and Gain StructureDriveRack Harman International Company