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The new in-line subwoofer calculator included in PAcalculate v1.3.2 allows for simulation of end-fire and gradient arrays.

RCF Presents PAcalculate App Update With Subwoofer Array Modeling

New version 1.3.2 of the Android and iOS app now offers both in-line and broadside subwoofer array calculators that join more than existing 30 calculators, reference info and utilities.

RCF has announced PAcalculate version 1.3.2, the latest update for the Android and iOS app for mobile phone or tablet offering more than 30 calculators, reference info, and utilities for sound reinforcement and lighting professionals that now offers both in-line and broadside subwoofer array calculators.

The in-line sub calculator allows for simulation of end-fire and gradient arrays, including an obscure four-element topology originally proposed by the very Harry Olson. The broadside sub calculator includes independent mechanical and electronic arcing and steering, with the possibility of adding a gradient line or several end-fire lines, a type of sub configuration that has become more widespread to achieve wider uniform coverage with reduced stage leakage.

Also included are frequency response graphs (front-to-back ratio as well as multi-angle responses), an isobar display, polar plots and coverage maps foster the analysis of design alternatives. Up to 96 elements (sound sources) can be simulated, 48+48 in L/R mode. A table is displayed with coordinates and settings (delay, polarity) that can be emailed for reference. A footer alerts the user if the specific configuration requires delay tuning on top of the results calculated (such as for gradient arrays).

The dedicated tool reportedly helps getting results quickly and easily. As an example, comparing between electronic and mechanical steering simply requires entering the angle in the rotation input field of the broadside array calculator to get results for the former and then clicking on a radio button to switch to results for the latter. The user interface also encourages “what if” experimentation such as trying different toe-out angles in left/right deployments. Settings can be combined such that the user could, for example, simulate a L/R arrangement with two broadside arrays that are arced electronically (using delay) but also steered mechanically and complemented with a gradient line.

Developer Joe Brusi of Brusi Acoustics, a consulting firm for electroacoustics and an independent laboratory for loudspeaker testing based in Valencia, Spain, states: “RCF and PAcalculate go back a long way, since they were the very first sponsor for the app, so I’s great to see such a respected logo on the most exciting update since it was first launched in 2014.”

PAcalculate can be downloaded for free at the Play Store (here) and the App Store (here). The app supports eight different languages, including English, Spanish, Italian and Chinese (the app’s largest user base).


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