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AES: JBL VerTec V4

JBL Professional’s new V4 DSP preset data for all passive VerTec loudspeaker system models includes system drive files for all full-size, mid-size and compact line array elements, along with a wide variety of VERTEC subwoofer combinations.

The development of the V4 DSP preset data for VerTec systems included the use of new proprietary tools: JBL Engineering’s LDM™ (Loudspeaker Data Manager) software enabled the pre-modeling of crossover topologies, corrective section equalization and time alignment, passband interactions, beamwidth, directivity index, and normalized horizontal and vertical off-axis response. V4 DSP preset development included competitive-system benchmarking with critical listening and reference system measurements. Indoor and outdoor sessions were staged with all combinations of VerTec system models, using spatial-averaging system measurement techniques. Performance audio criteria was used to achieve optimum limiter settings.

An extended field-testing program with partners in Asia, Europe, Latin America and North America began with an initial trial during the globally telecast Live Earth concert event at Giants Stadium, and proceeded at other major concerts and special events. Upgrades to V4 are already underway and planned for VerTec systems installed at live performance venues such as the Gibson Amphitheater at Universal Citywalk, Houston’s Lakewood Church, Los Angeles’ new Nokia Theatre L.A. Live venue and Radio City Music Hall.

Support for a broad range of signal processing platforms is included with the new V4 DSP presets. The dbx 4800 loudspeaker-management system was used as a reference development platform due to its extensive filtering capabilities and 96kHz DSP engine. Available technical information to facilitate the use of V4 presets by VerTec system operators includes download and programming instructions, preset descriptions for each DSP platform,and I/O channel configuration worksheets.

For more information and access to JBL V4 DSP presets for VerTec, visit For additional SR news, visit The Briefing Room or