A 20mW point source far field fixed focus coaxial laser module. During loudspeaker array rigging, precise angular alignment is critical, directly impacting sound coverage uniformity and Sound Pressure Level distribution. Traditional visual estimation or basic measuring tools fail to meet the micron level accuracy requirements, compromising both efficiency and safety during aerial operations.

The Laser Alignment Protractor addresses these challenges by delivering real time visual angle verification through a high accuracy laser projection system. The Horizontal Laser Level Goniometer features three externally mounted high precision laser modules with ultra strong neodymium magnets, projecting ultra flat high intensity green laser beams. With 0° to 180° adjustable angles, users can swiftly set the laser projection angle to match the loudspeaker's designed coverage requirements.

This device can be placed on level ground or securely attached to the speaker hanger. Users simply adjust the chain hoist or speaker until the rigging aligns precisely with the laser reference lines. The Horizontal Laser Level Goniometer was developed to simply and quickly solve the problem of angle positioning for speaker hoisting.