The ML15F, ML25F and ML25H PA loudspeakers are designed for use in harsh environments with high ambient noise levels and provide robust voice notification for fire alarm, emergency, and professional or commercial applications. All models feature IP66 and IP67 rated enclosures manufactured from high-impact, fire-retardant ABS, with dual cable entries and large termination areas including in and out terminals for convenient installation. Each unit is supplied with a 316 stainless steel ratchet-adjustable mounting bracket to allow optimum positioning. The loudspeakers are available in low impedance 8 or 16 Ohm versions and support line transformer options, and all models are UL and cUL approved for Fire Alarm & Emergency and Professional & Commercial use.

The main differences between the models relate to power rating, acoustic output and application coverage. The ML15F is a 15W loudspeaker producing a maximum SPL of 120dB(A), making it the lowest output model in the range and suitable for smaller areas or applications where moderate sound levels are required. The ML25F increases the output with a 25W power rating and 124dB(A) maximum SPL, providing higher sound pressure and wider coverage while maintaining strong intelligibility. The ML25H is the highest output model, also rated at 25W, but featuring a high-output flare horn design capable of producing up to 129dB(A) SPL, making it the most suitable option for large areas or extremely noisy environments requiring maximum sound projection and clarity. Additionally, while the ML15F and ML25F are available with 25, 70 and 100V line transformer options, the ML25H supports 25V and 70V line transformers only, reflecting its design focus on high-output wide-area notification.