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JBL Software Tools

JBL Software Tools

JBL Professional offers a suite of convenient and intelligent software tools to assist you to precisely design and model your system. These tools support the optimisation of model selection, system performance, coverage, and cross sectional sound whilst also reducing design time.

Or the Technical Sales Support Team at MadisonAV can provide you with system design and EASE modelling, request our assistance here.

CBT Calculator


JBL’s CBT Calculator software is a precision engineering tool allowing audio professionals to design JBL’s CBT Constant Beamwidth Technology line array column loudspeakers into a wide variety of venues.

CBT Calculator shows the vertical coverage of CBT models in venues via a cross-sectional sound level coverage display. The program allows the use of up to 3 CBT speakers and virtual adjustment of their various adjustable settings for vertical coverage (narrow or broad) and voicing (speech or music/flat), in a space with up to 4 independent listening planes.

In addition to the SPL vertical coverage mapping of a proposed design, the CBT Calculator also shows the frequency response for up to 6 listener locations as well as an SPL summary of the listener locations over user-defined frequency bands.

It helps designers to determine the best CBT model selection, the proper vertical coverage and voicing settings, mounting height and the down-angle, allowing audio professionals to design CBT column line array speakers into many venue-application types.

Ceiling Speaker Configurator (CSC) and Distributed System Design (DSD) Software

CSC is a general sales estimation tool for basic projects. It comes up with a few ideas about which ceiling speaker could be used and approximately how many. This free utility program helps select the most economical JBL ceiling speaker to use based on various characteristics of the project, based on desired music level (for music systems) or background noise level (for paging systems).

The intention is that the use will then model the project more completely in the DSD Distributed System Design software to determine how/whether the various possibilities from CSC might work for the project. DSD allows the user to change the design for “what if” scenarios:
  • What will happen if we change the design to a different loudspeaker model, to a different tap setting, to a different density factor, etc?
  • What happens if we trim the pendant speakers at a different height?
  • What impact would different changes have on the number of speakers required, the layout distance between speakers, the resulting sound level, the level variation throughout the space, the required amplification, etc?

VLA-C Calculator

The free VLA-C Calculator is simulation software for designing and predicting JBL VLA-C Series systems.

The Acoustical Mapping tab allows for 2D sectional-view modeling of VLA-C arrays on up to four seating planes. Included are both patterns of the VLA-C full-range boxes  (VLA-C265 and VLA-C2100) and the subwoofer (VLA-C125S). Mixed arrays may be modeled.

The Array Configuration tab describes the array and provides information about weight factors and centre of gravity (CG), along with mechanical validation of the array. The array weight design factor is selectable between 5:1, 7:1, and 10:1.

Frame options are selectable. If the array configuration falls outside the load limits of either the speaker cabinets, the speaker interconnect system, or the suspension system, this will be indicated via an error indication. Array statistics like total weight, attach point span, and array height and depth are also calculated.

DDA (Digital Directivity Analysis)

DDA is a powerful yet intuitive Windows application for accurately predicting the electro-acoustic performance of loudspeaker systems in (semi) open or closed spaces.

It includes 3D room acoustic modelling, direct sound simulation as well as statistical prediction of various acoustic parameters. DDA supports all JBL point source loudspeakers with CLF data and all JBL Intellivox products. Intellivox makes use of JBL’s advanced beam shaping (DDS) technologies.

From DDA the radiation pattern of JBL Intellivox loudspeaker arrays can be controlled precisely and tailored to the shape and the acoustics of the space. In addition, DDA offers various design tools which reduce design time and help the sound designer to optimise the system performance.

For installation and commissioning purposes DDA also generates FIR output filters which can be uploaded to supported DDS-controlled loudspeaker arrays using the JBL WinControl software.

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