The Tweaker is a tool designed to provide a visual guide for the high frequency dispersion of a point source system component enabling the user to optimise the focus on the fly prior to the system being fully instated or in the absence of a CAD system design. The inspiration for the product is derived from my practical experience of PA design and installation whilst working in the UK theatre industry.
The product features a 200mW Class 3B laser module and crosshair lens, bright enough to be visible in most auditoria*, with shutters to control the dispersion from the product aperture allowing the replication of both symmetric and asymmetric horns. The casing contains 5° increments with a 90° x 60° source, for example, able to replicated by adjusting the horizontal shutters to ±45° and vertical shutters to ±30°. The product is USB-C rechargeable with a 250mAh battery providing a maximum of 5 hours continuous use and a casing D-loop, latching switch and 11kg pull magnet on the rear of the device are included to enable the product to be secured to a speaker grille hands free**. The initial prototype of the device was able to support its own weight on a JBL Control 1 grille which was used as the benchmark for minimum grille thickness.
The Tweaker is used by referring to manufacturer's instructions to identify the HF dispersion of an acoustic source, placing the device in front of the Tweeter component and activating the laser to display the HF coverage. By using with the other products developed by Augment The Event; the Star Spangled Panner and Incline To Degree, the chosen speaker focus can quickly be replicated in symmetrical setups.
The Class 3B laser module included in the device, whilst diffuse, is capable of eye injury (https://www.lasersafetyfacts.com/3B/) and should only be used by a responsible person. This product should not be used by a minor.
The magnet included in the device is powerful enough to affect pacemaker operation and as such should not be used by or around a person with one fitted. The magnet is capable of erasing data / damaging older magnetic IDE hard-drives and credit cards. Not all speaker grilles are made of ferrous material.
*depending on the size of the auditorium and brightness of the venue house lights.
** a tool lanyard should be affixed to the D-loop and used in conjunction with the magnet especially when at height.