Check the listing for details. Wheelock SPB-80/4 SAFEPATH Supervised Audio Power Booster. Condition: Used. Listed at 581.99 USD. The Wheelock SPB-80/4 SAFEPATH Supervised Audio Power Booster is a high-performance audio power booster designed to enhance the effectiveness of mass notification and emergency communication systems. It is part of Wheelock's SAFEPATH series, offering supervised amplification for audio systems in commercial, industrial, and public safety applications. The SPB-80/4 provides 80 watts of audio power, ensuring clear and loud audio delivery throughout large spaces or complex facilities. This booster works in conjunction with SAFEPATH audio distribution systems to improve the clarity and reach of voice evacuation, paging, and emergency notification messages. The unit features a supervised design, ensuring continuous monitoring of the audio output, which provides a level of reliability critical in.