Home JBL Professional User Forum JBL Pro Live Portable Products

JBL EON ONE MK2 - Avoiding Comb Filtering

Hi, I'm going to link up my pair of Eon One Compacts to the pass through on the Eon One MK2 Line array to reinforce the sound in larger rooms.
Is there any way to adjust the JBL Eon One MK2 to allow for the potential delay caused by the pass through?


  • Options

    Howdy! Are you meaning delay in the Eon One MK2's processing? This, fortunately, should not occur, BUT there is Delay Compensation for Time-Aligning the speakers you are adding to the setup by utilizing the Pass-Thru, if distance from your array deems it necessary (as well as delaying the array itself, if the speakers you add are further back. eg. added subwoofer near stage, with array a few feet in front). I have included a section from the User Manual about these functions-

    7. Pass Thru and Time Align - Thru XLR output can be set to assist in feeding the mix to additional speakers. This 
         section includes presets and settings based on the type of speaker the Pass Thru will be feeding and how it is 
         positioned in comparison to this speaker and the audience. 
              a. “Pass Thru” On/Off” enables or disables the Pass Thru XLR output feed.
              b. “Presets” enables selection of three types of speakers combinations using the Pass Thru XLR output. 
              c. “Full Range” is designed for feeding another full range speaker. This feeds both this and the Pass Thru 
                   XLR out to another speaker with the same full frequency range mix.
              d. “Sub” preset automatically configures the below settings for isolating low frequencies and only feeding 
                   them to Pass Thru XLR out for a subwoofer speaker. Selecting “Sub” automatically sets the internal amp/
                   speaker feed to HPF (“high pass filter”) only signal at above 80Hz and the Pass Thru XLR output to only 
                   pass the mix signal below 80Hz. 
              e. “Custom” allows the user to set the lower settings manually. 
              f. “HPF on this Speaker” can be used to remove signal below a selected frequency to the built-in amp/
                   speaker and tweeter bar. 
              g. “LPF on Pass Thru Out”can be used to set the low pass filter on the Thru Out XLR output feed.
    8. Time Align
              a. Signal delays are used when multiple speakers are in use but speakers are at different distances from the 
              b. Examples:
                        i. A subwoofer in front of the stage, while this full-range speaker is on the stage. In this configuration, 
                             the Pass Thru XLR to subwoofer will need to be slightly delayed to make up for its closer position to 
                             the audience.
                        ii. The Array bar extender option is used to mount the speaker bar in a off-speaker location at a slightly 
                             different distance to the audience. In this case, delay the device closest to the audience to align with 
                             the device farthest from the audience. 
                        iii. The Pass Thru XLR out is feeding an additional full-range speaker placed half-way back in the 
                             audience to give additional listening distance. In this case, delay the back fill speaker in the audience 
                             to compensate correct time alignment. 
              c. Time Alignment Basics: 
                        i. To compensate for different distances’, determine the speaker farthest from the audience and delay 
                             other speakers with the same signal to “time align” with the speaker farthest away from the audience. 
                        ii. Sound travels through air at average humidity and room temperature at about 1.1 feet per ms (3ms 
                             per 1m). Measure the difference in distance of each speaker feeding the audience. Feed the speaker 
                             farthest from the audience with no time alignment delay. Set delays for the other closer speakers 
                             based on their distance ahead of the farthest back speaker. Measure the distance difference and 
                             enter 1 ms per 1.1 feet that each speaker is ahead of the farthest back speaker in your configuration. 
                             Time alignment is not perfect as not all audience positions measure the same speaker distance 
                        iii. “Delay Pass Thru Out” Using this delay will place speaker delay on the PASS THRU Output. 
                        iv. “Delay This Speaker” Using this delay will place the delay on the INPUT of the mixer of the current 
Sign In or Register to comment.